1
FEATURES APPLICATIONS
DESCRIPTION
1
6
2
3
7
VI
Inhibit
GND GND
VO
1%,0.05W
(Required)
PTN78060
(TopView)
STANDARD APPLICATION
RSET#
4 5 VOSense
L
O
A
D
C *
Ceramic
(Required)
IC *
100 Fm
(Required)
O
*Seethe sectionforcapacitorrecommendations.Theminimuminputcapacitance
is PTN78060W,and PTN78060H.
ApplicationInformation
2.2 Ffor 14.1 F(3x4.7 F)form m m
#R oltage.Seethe sectionforValues.
SET ApplicationInformationisrequiredtoadjusttheoutputv
PTN78060W , PTN78060H
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................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
3-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR
•General-Purpose, Industrial Controls,•3-A Output Current
HVAC Systems•Wide-Input Voltage
•Test and Measurement,(7 V to 36 V) / (15 V to 36 V)
Medical Instrumentation•Wide-Output Voltage Adjust
•AC/DC Adaptors, Vehicles,(2.5 V to 12.6 V) / (11.85 V to 22 V)
Marine, and Avionics•High Efficiency (Up to 96%)•On/Off Inhibit•Under-Voltage Lockout•Output Current Limit•Overtemperature Shutdown•Operating Temperature: -40 ° C to 85 ° C•Surface Mount Package Available
The PTN78060 is a series of high-efficiency, step-down integrated switching regulators (ISR), that represent thethird generation in the evolution of the popular (PT)78ST200, 78ST300, (PT)78HT200, and 78HT300 series ofproducts. In new designs, the PTN78060 series may also be considered in place of the PT6200, PT6210, andPT6300 series of single in-line pin (SIP) products. In all cases, the PTN78060 has either similar or improvedelectrical performance characteristics. The caseless, double-sided package has excellent thermal characteristics,and is compatible with TI ' s roadmap for RoHS and lead-free compliance.
Operating from a wide-input voltage range, the PTN78060 provides high-efficiency, step-down voltageconversion for loads of up to 3 A. The output voltage can be set to any value over a wide adjustment range usinga single external resistor. The PTN78060W may be set to any value within the range, 2.5 V to 12.6 V, and thePTN78060H from 11.85 V to 22 V. The output voltage of the PTN78060W can be as little as 2 V lower than theinput, allowing operation down to 7 V, with an output voltage of 5 V. The output voltage of the PTN78060H canbe as little as 3 V lower than the input, allowing operation down to 15 V, with an output voltage of 12 V.
The PTN78060 has undervoltage lockout, an integral on/off inhibit, and includes an output current limit andovertemperature protection. It is well suited to a wide variety of general-purpose applications that operate off12-V, 24-V, or 28-V DC power.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004 – 2009, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
ABSOLUTE MAXIMUM RATINGS
(1)
RECOMMENDED OPERATING CONDITIONS
PACKAGE SPECIFICATIONS
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foamduring storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or seethe TI website at www.ti.com.
over operating free-air temperature range unless otherwise notedall voltages with respect to GND
UNIT
T
A
Operating free-air temperature Over V
I
range – 40 ° C to 85 ° CSurface temperature of module body or 260 ° CWave solder temperature Horizontal TH (suffix AH)pins (5 seconds)
Surface temperature of module body or Horizontal SMD (suffix AS) 235 ° CSolder reflow temperature
pins
Horizontal SMD (suffix AZ) 260 ° CT
stg
Storage temperature – 55 ° C to 125 ° CV
I
Input surge voltage, 10 ms maximum 38 VV
(Inhibit)
Inhibit (pin 3) input voltage – 0.3 V to 5 VP
O
Output power V
O
≥15 V 45 W
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated under recommended operatingconditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
MIN MAX UNIT
PTN78060W 7 36V
I
Input voltage VPTN78060H 15 36T
A
Operating free-air temperature – 40 85 ° C
PTN78060x (Suffix AH, AS, and AZ)
Weight 3.9 gramsFlammability Meets UL 94 V-OPer Mil-STD-883D, Method 2002.3, 1 ms, 1/2 sine,Mechanical shock 500 G
(1)mounted
Horizontal T/H (suffix AH) 20 G
(1)Mechanical vibration Mil-STD-883D, Method 2007.2, 20-2000 Hz
Horizontal SMD (suffix AS and AZ) 20 G
(1)
(1) Qualification limit.
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ELECTRICAL CHARACTERISTICS
PTN78060W , PTN78060H
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................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
operating at 25 ° C free-air temperature, V
I
= 20 V, V
O
= 5 V, I
O
= I
O
(max), C
I
= 2.2 µ F, C
O
= 100 µ F (unless otherwise noted)
PTN78060WPARAMETER TEST CONDITIONS
MIN TYP MAX UNIT
I
O
Output current T
A
= 85 ° C, natural convection airflow 0 3 A
V
I
Input voltage range Over I
O
range 7
(1)
36
(2)
V
Set-point voltage tolerance T
A
= 25 ° C ± 2%
(3)
Temperature variation – 40 ° C to +85 ° C ± 0.5%
Line regulation Over V
I
range ± 10 mVV
O
Load regulation Over I
O
range ± 10 mV
Includes set point, line, loadTotal output voltage variation ± 3%
(3)– 40 < T
A
< 85 ° C
V
I
< 12 V 2.5 V
I
– 2
12 V ≤V
I
≤15.1 V 2.5 V
I
– 2.5V
O
(adj) Output voltage adjust range V15.1 V < V
I
≤25 V 2.5 12.6
V
I
> 25 V 0.1 × V
I
12.6
V
I
= 24 V, I
O
= 3 A
R
SET
= 732 Ω, V
O
= 12 V 94%ηEfficiency
R
SET
= 21 k Ω, V
O
= 5 V 86%
R
SET
= 78.7 k Ω, V
O
= 3.3 V 82%
Output voltage ripple 20-MHz bandwidth 1% V
O
V
(PP)
I
O (LIM)
Current limit threshold ΔV
O
= – 50 mV 5.5 A
1-A/ µ s load step from 50% to 100% I
O
max
Transient response Recovery time 100 µ s
V
O
over/undershoot 5 %V
O
Input high voltage (V
IH
) 1 Open
(4)
VInhibit control (pin 3) Input low voltage (V
IL
) – 0.1 0.3
Input low current (I
IL
) 0.25 mA
I
I(stby)
Input standby current Pin 3 connected to GND 17 mA
F
S
Switching frequency Over V
I
and I
O
ranges 440 550 660 kHz
C
I
External input capacitance 2.2
(5)
µ F
Ceramic or nonceramic 100
(6)
Ceramic 200 µ FC
O
External output capacitance
Nonceramic 2,000
Equivalent series resistance (nonceramic) 10
(7)
mΩ
Per Telcordia SR-332, 50% stress,MTBF Calculated reliability 8.9
10
6
HrT
A
= 40 ° C, ground benign
(1) For output voltages less than 10 V, the minimum input voltage is 7 V or (V
O
+ 2) V, whichever is greater. For output voltages of 10 Vand higher, the minimum input voltage is (V
O
+ 2.5) V. See the Application Information section for further guidance.(2) For output voltages less than 3.6 V, the maximum input voltage is 10 × V
O
. See the Application Information section for further guidance.(3) The set-point voltage tolerance is affected by the tolerance and stability of R
SET
. The stated limit is unconditionally met if R
SET
has atolerance of 1% with 100 ppm/ ° C or better temperature stability.(4) This control pin has an internal pullup, and if left open-circuit, the module operates when input power is applied. The open-circuit voltageis typically 1.5 V. A small, low-leakage ( < 100 nA) MOSFET is recommended for control. An external pull-up resistor should not be used.See the Application Information for further guidance.(5) An external 2.2- µ F ceramic capacitor is required across the input (V
I
and GND) for proper operation. Locate the capacitor close to themodule.
(6) 100 µ F of output capacitance is required for proper operation. See the Application Information section for further guidance.(7) This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 17 m Ωas the minimum when using max-ESR values tocalculate.
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Product Folder Link(s): PTN78060W PTN78060H
ELECTRICAL CHARACTERISTICS
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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operating at 25 ° C free-air temperature, V
I
= 24 V, V
O
= 12 V, I
O
= I
O
(max), C
I
= 3 × 4.7 µ F, C
O
= 100 µ F (unless otherwisenoted)
PTN78060HPARAMETER TEST CONDITIONS
MIN TYP MAX UNIT
V
O
= 12 V 0 3
(1)
T
A
= 85 ° C, natural convectionI
O
Output current V
O
= 15 V 0 3
(1)
Aairflow
V
O
= 22 V 0 2
(1)
V
I
Input voltage range Over I
O
range 15
(2)
36 V
Set-point voltage tolerance T
A
= 25 ° C ± 2%
(3)
Temperature variation – 40 ° C to +85 ° C ± 0.5%
Line regulation Over V
I
range ± 10 mVV
O
Load regulation Over I
O
range ± 10 mV
Includes set point, line, loadTotal output voltage variation ± 3%
(3)– 40 < T
A
< 85 ° C
V
I
< 19 V 11.85 V
I
– 3
19 V ≤V
I
≤25 V 11.85 V
I
– 4V
O
(adj) Output voltage adjust range V
V
I
≥26 V 11.85 22
V
I
= 24 V, R
SET
= 383 k Ω, V
O
= 12 V 93%
ηEfficiency V
I
= 24 V, R
SET
= 15 k Ω, V
O
= 15 V 95%
I
O
= 2 A, V
I
= 32 V, R
SET
= 95.3 Ω, V
O
= 22 V, 96%
Output voltage ripple 20-MHz bandwidth 1.2% V
O
V
(PP)
I
O (LIM)
Current limit threshold ΔV
O
= – 50 mV 5.5 A
1-A/ µ s load step from 50% to 100% I
O
max
Transient response Recovery time 100 µ s
V
O
over/undershoot 5 %V
O
Input high voltage (V
IH
) 1 Open
(4)
VInhibit control (pin 3) Input low voltage (V
IL
) – 0.1 0.3
Input low current (I
IL
) 0.25 mA
I
I(stby)
Input standby current Pin 3 connected to GND 17 mA
F
S
Switching frequency Over V
I
and I
O
ranges 440 550 660 kHz
C
I
External input capacitance Ceramic or nonceramic 14.1
(5)
µ F
Ceramic 0 200
µ FC
O
External output capacitance Nonceramic 100
(6)
2,000
Equivalent series resistance (nonceramic) 10
(7)
mΩ
Per Telcordia SR-332, 50% stress,MTBF Calculated reliability 8.9
10
6
HrT
A
= 40 ° C, ground benign
(1) The maximum output current is 3 amps or a maximum output power of 45 W, whichever is less. See the Application Information sectionfor further guidance.(2) For output voltages less than 19 V, the minimum input voltage is 15 V or (V
O
+ 3) V, whichever is greater. For output voltages of 19 Vand higher, the minimum input voltage is (V
O
+ 4) V. See the Application Information for further guidance.(3) The set-point voltage tolerance is affected by the tolerance and stability of R
SET
. The stated limit is unconditionally met if R
SET
has atolerance of 1% with 100 ppm/ ° C or better temperature stability.(4) This control pin has an internal pullup, and if left open-circuit, the module operates when input power is applied. The open-circuit voltageis typically 1.5 V. A small, low-leakage ( < 100 nA) MOSFET is recommended for control. See the Application Information section forfurther guidance.(5) Three external 4.7- µ F ceramic capacitors are required across the input (V
I
and GND) for proper operation. Locate the capacitor close tothe module.(6) 100 µ F of output capacitance is required for proper operation. See the Application Information section for further guidance.(7) This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 17 m Ωas the minimum when using max-ESR values tocalculate.
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Product Folder Link(s): PTN78060W PTN78060H
PIN ASSIGNMENT
PTN78060
(TopView)
1
2
7
6
543
PTN78060W , PTN78060H
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................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTIONNAME NO.
This is the common ground connection for the V
I
and V
O
power connections. It is also the 0-VDCGND 1, 7
reference for the Inhibit and V
O
Adjust control inputs.V
I
2 I The positive input voltage power node to the module, which is referenced to common GND.The Inhibit pin is an open-collector/drain active-low input that is referenced to GND. Applying a low-levelground signal to this input disables the module ' s output and turns off the output voltage. When the InhibitInhibit 3 I
control is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is leftopen-circuit, the module produces an output whenever a valid input source is applied.A 1% resistor must be connected between this pin and GND (pin 7) to set the output voltage. If leftopen-circuit, the output voltage is set to a default value. The temperature stability of the resistor should beV
O
Adjust 4 I
100 ppm/ ° C (or better). The standard resistor value for a number of common output voltages is providedin the application information.The sense input allows the regulation circuit to compensate for voltage drop between the module and theV
O
Sense 5 I load. For optimum voltage accuracy, V
O
Sense should be connected to V
O
. If the sense feature is notused, this pin may be left disconnected.V
O
6 O The regulated positive power output with respect to the GND node.
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 5
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TYPICAL CHARACTERISTICS (7-V INPUT)
(1) (2)
0 0.5 1 1.5 2 2.5 3
50
60
70
80
90
100
VO = 3.3 V
VO = 2.5 V
VO = 5 V
Efficiency − %
IO − Output Current − A
0
10
20
30
40
50
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
− Output Voltage Ripple − mV
VOPP
VO = 3.3 V
VO = 2.5 V
VO = 5 V
0
0.4
0.8
1.2
1.6
2
0 0.5 1 1.5 2 2.5 3
− Power Dissipation − W
PD
IO − Output Current − A
VO = 3.3 V
VO = 2.5 V
VO = 5 V
20
30
40
50
60
70
80
90
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
200 LFM
Ambient Temperature −
5C
100 LFM
Nat conv
VO = 3.3 V
20
30
40
50
60
70
80
90
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
200 LFM
Ambient Temperature −
5C
100 LFM
Nat conv
VO = 5 V
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATIONvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 1. Figure 2. Figure 3.
TEMPERATURE DERATING TEMPERATURE DERATINGvs vsOUTPUT CURRENT OUTPUT CURRENT
Figure 4. Figure 5.(1) The electrical characteristic data has been developed from actual products tested at 25 ° C. This data is considered typical for theconverter. Applies to Figure 1 ,Figure 2 , and Figure 3 .(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer ' s maximumoperating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm, double-sided PCB with 2 oz. copper.For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please referto the mechanical specification for more information. Applies to Figure 4 and Figure 5 .
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TYPICAL CHARACTERISTICS (15-V INPUT)
(1) (2)
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
− Output Voltage Ripple − mV
VOPP
VO = 3.3 V
VO = 5 V
VO = 9 V
VO = 12 V
VO = 2.5 V
0
0.5
1
1.5
2
2.5
0 0.5 1 1.5 2 2.5 3
− Power Dissipation − W
PD
IO − Output Current − A
VO = 3.3 V
VO = 9 V
VO = 12 V
0 0.5 1 1.5 2 2.5 3
50
60
70
80
90
100
VO = 3.3 V
VO = 5 V
VO = 9 V
VO = 2.5 V
VO = 12 V
Efficiency − %
IO − Output Current − A
20
30
40
50
60
70
80
90
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
200 LFM
Ambient Temperature −
5C
100 LFM
Nat conv
VO = 3.3 V
20
30
40
50
60
70
80
90
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
200 LFM
Ambient Temperature −
5C
100 LFM
Nat conv
VO = 5 V
20
30
40
50
60
70
80
90
0 0.5 1 1.5 2 2.5 3
IO − Output Current − A
200 LFM
Ambient Temperature − 5C
100 LFM
Nat conv
VO = 12 V
PTN78060W , PTN78060H
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................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATIONvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 6. Figure 7. Figure 8.
TEMPERATURE DERATING TEMPERATURE DERATING TEMPERATURE DERATINGvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 9. Figure 10. Figure 11.(1) The electrical characteristic data has been developed from actual products tested at 25 ° C. This data is considered typical for theconverter. Applies to Figure 6 ,Figure 7 , and Figure 8 .(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer ' s maximumoperating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm, double-sided PCB with 2 oz. copper.For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please referto the mechanical specification for more information. Applies to Figure 9 through Figure 11 .
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TYPICAL CHARACTERISTICS (24-V INPUT)
(1) (2)
0 0.5 1 1.5 2 2.5 3
40
50
60
70
80
90
100
Efficiency-%
I -OutputCurrent- A
O
V =2.5V
O
V =3.3V
O
V =5V
O
V =15V
O
V =12V
O
0
20
120
40
140
60
160
80
180
100
200
0 0.5 1 1.5 2 2.5 3
I -OutputCurrent- A
O
V -OutputVoltageRipple-mV
O PP
V =12V
O
V =3.3V
OV =5V
O
V =2.5V
O
V =15V
O
0
0.5
1
1.5
2
2.5
0 0.5 1 1.5 2 2.5 3
-PowerDissipation-W
PD
IO-OutputCurrent- A
VO=5V
3
V
V
O
O
=12V
=15V
V
V
O
O
=2.5V
=3.3V
VO=3.3V
100LFM
Natconv
200LFM
AirFlow
20
30
40
50
60
70
80
90
AmbientTemperature- C°
0 0.5 1 1.5 2 2.5 3
IO-OutputCurrent- A
20
30
40
50
60
70
80
90
AmbientTemperature- C°
0 0.5 1 1.5 2 2.5 3
IO-OutputCurrent- A
VO=5V
AirFlow
200LFM
100LFM
Natconv
20
30
40
50
60
70
80
90
AmbientTemperature- C°
0 0.5 1 1.5 2 2.5 3
IO-OutputCurrent- A
AirFlow
200LFM
100LFM
Natconv
VO=12V
20
30
40
50
60
70
80
90
0 0.5 1 1.5 2 2.5 3
IO-OutputCurrent- A
AmbientTemperature- C°
AirFlow
VO=15V
100LFM
200LFM
Natconv
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATIONvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 12. Figure 13. Figure 14.
TEMPERATURE DERATING TEMPERATURE DERATING TEMPERATURE DERATINGvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 15. Figure 16. Figure 17.
TEMPERATURE DERATING
vsOUTPUT CURRENT
Figure 18.(1) The electrical characteristic data has been developed from actual products tested at 25 ° C. This data is considered typical for theconverter. Applies to Figure 12 ,Figure 13 , and Figure 14 .(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer ' s maximumoperating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm, double-sided PCB with 2 oz. copper.For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please referto the mechanical specification for more information. Applies to Figure 15 through Figure 18 .
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TYPICAL CHARACTERISTICS (32-V INPUT)
(1) (2)
40
50
60
70
80
90
100
Efficiency-%
0 0.5 1 1.5 2 2.5 3
I -OutputCurrent- A
O
V =5V
O
V =3.3V
O
V =12V
O
V =15V
O
V =22V
O
0
0.5
1
1.5
2
2.5
3
P -PowerDissipation-W
D
0 0.5 1 1.5 2 2.5 3
I -OutputCurrent- A
O
V =5V
O
V =3.3V
O
V =12V
O
V =15V
O
V =22V
O
0
50
100
150
200
250
300
V -OutputVoltageRipple-mV
O PP
0 0.5 1 1.5 2 2.5 3
I -OutputCurrent- A
O
V =5V
OV =3.3V
O
V =12V
O
V =15V
O
V =22V
O
0 0.5 1 1.5 2.52 3
I -OutputCurrent- A
O
20
30
40
50
60
70
80
90
AmbientTemperature- C°
100LFM
200LFM
AirFlow
V =3.3V
O
AirFlow
100LFM
200LFM
Natconv
0 0.5 1 1.5 2.52 3
I -OutputCurrent- A
O
20
30
40
50
60
70
80
90
AmbientTemperature- C°
100LFM
200LFM
AirFlow
V =5V
O
AirFlow
100LFM
200LFM
Natconv
0 0.5 1 1.5 2.52 3
I -OutputCurrent- A
O
20
30
40
50
60
70
80
90
AmbientTemperature- C°
100LFM
200LFM
AirFlow
V =12V
O
AirFlow
100LFM
200LFM
Natconv
0 0.5 1 1.5 2.52 3
I -OutputCurrent- A
O
20
30
40
50
60
70
80
90
AmbientTemperature- C°
100LFM
200LFM
Natconv
AirFlow
VO=15V
AirFlow
100LFM
200LFM
Natconv
0 0.5 1 1.5 2
I -OutputCurrent- A
O
20
30
40
50
60
70
80
90
AmbientTemperature- C°
100LFM
200LFM
Natconv
AirFlow
VO=22V
PTN78060W , PTN78060H
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................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATIONvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 19. Figure 20. Figure 21.
TEMPERATURE DERATING TEMPERATURE DERATING TEMPERATURE DERATINGvs vs vsOUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT
Figure 22. Figure 23. Figure 24.
TEMPERATURE DERATING TEMPERATURE DERATINGvs vsOUTPUT CURRENT OUTPUT CURRENT
Figure 25. Figure 26.(1) The electrical characteristic data has been developed from actual products tested at 25 ° C. This data is considered typical for theconverter. Applies to Figure 19 ,Figure 20 , and Figure 21 .(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer ' s maximumoperating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm, double-sided PCB with 2 oz. copper.For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please referto the mechanical specification for more information. Applies to Figure 22 through Figure 26 .
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Link(s): PTN78060W PTN78060H
APPLICATION INFORMATION
Adjusting the Output Voltage of the PTN78060 Wide-Output Adjust Power Modules
General
R =54.9k
SET W´1.25 V
V -V
O min
-RP
(1)
Input Voltage Considerations
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
www.ti.com
A resistor must be connected between the V
O
Adjust control (pin 4) and GND (pin 1) to set the output voltage.The adjustment range is from 2.5 V to 12.6 V for PTN78060W. The adjustment range is from 11.85 V to 22 V forPTN78060H. If pin 4 is left open, the output voltage defaults to the lowest value.
Table 2 gives the standard resistor value for a number of common voltages, and with the actual output voltagethat the value produces. For other output voltages, the resistor value can either be calculated using Equation 1and the constants for the applicable product in Table 1 . Alternatilvey, R
SET
can be simply selected from the rangeof values given in Table 3 and Table 4 .Figure 27 shows the placement of the required resistor.
Table 1. R
SET
Formula Constants
PRODUCT V
MIN
R
P
PTN780x0W 2.5 V 6.49 k Ω
PTN780x0H 11.824 V 6.65 k Ω
The PTN78060 is a step-down switching regulator. In order that the output remains in regulation, the inputvoltage must exceed the output by a minimum differential voltage.
Another consideration is the pulse width modulation (PWM) range of the regulator's internal control circuit. Forstable operation, its operating duty cycle should not be lower than some minimum percentage. This defines themaximum advisable ratio between the regulator input and output voltage magnitudes.
For satisfactory performance, the operating input voltage range of the PTN78060x must adhere to the followingrequirements.
1. For PTN78060W output voltages lower than 10 V, the minimum input voltage is (V
O
+ 2 V ) or 7 V, whicheveris higher.
2. For PTN78060W output voltages equal to 10 V and higher, the minimum input voltage is (V
O
+ 2.5 V ).3. The maximum input voltage for PTN78060W is (10 × V
O
) or 36 V, whichever is less.4. For PTN78060H output voltages lower than 19 V, the minimum input voltage is (V
O
+ 3 V) or 15 V, whicheveris higher.
5. For PTN78060H output voltages equal to 19 V and higher, the minimum input voltage is (V
O
+ 4 V ) .
As an example, Table 2 gives the operating input voltage range for the common output bus voltages. In addition,the Electrical Characteristics table defines the available output voltage adjust range for various input voltages.
Table 2. Standard Values of R
set
for Common Output VoltagesV
O
R
SET
V
O
OperatingPRODUCT
(Required) (Standard Value) (Actual) V
I
Range
2.5 V Open 2.5 V 7 V to 25 V
3.3 V 78.7 k Ω3.306 V 7 V to 33 VPTN780x0W
5 V 21 k Ω4.996 V 7 V to 36 V
12 V 732 Ω12.002 V 14.5 V to 36 V
12 V 383 k Ω12.000 V 15 V to 36 V
15 V 15 k Ω14.994 V 18 V to 36 VPTN780x0H
18 V 4.42 k Ω18.023 V 21 V to 36 V
22 V 95.3 21.998 V 26 V to 36 V
10 Submit Documentation Feedback Copyright © 2004 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTN78060W PTN78060H
GND
Inhibit
GND
PTN78060W
14
6
2
3
Adjust
GND GND
VO
VI
VIVO
Inhibit
7
5
Sense
+
CI
2.2 Fm
Ceramic
RSET
0.05W
1%
C
100 F
O
m
PTN78060W , PTN78060H
www.ti.com
................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
(1) A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/ ° C (orbetter). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 7using dedicated PCB traces.(2) Never connect capacitors from V
O
Adjust to either GND or V
O
. Any capacitance added to the V
O
Adjust pin affects thestability of the regulator.
Figure 27. PTN78060W V
O
Adjust Resistor Placement
Table 3. PTN78060W Output Voltage Set-Point Resistor ValuesV
O
R
SET
V
O
R
SET
V
O
R
SET
V
O
R
SET
2.50 V Open 3.7 V 50.7 k Ω6.1 V 12.6 k Ω9.0 V 4.07 k Ω
2.55 V 1.37 M Ω3.8 V 46.3 k Ω6.2 V 12.1 k Ω9.2 V 3.75 k Ω
2.60 V 680 k Ω3.9 V 42.5 k Ω6.3 V 11.6 k Ω9.4 V 3.46 k Ω
2.65 V 451 k Ω4.0 V 39.3 k Ω6.4 V 11.1 k Ω9.6 V 3.18 k Ω
2.70 V 337 k Ω4.1 V 36.4 k Ω6.5 V 10.7 k Ω9.8 V 2.91 k Ω
2.75 V 268 k Ω4.2 V 33.9 k Ω6.6 V 10.2 k Ω10.0 V 2.66 k Ω
2.80 V 222 k Ω4.3 V 31.6 k Ω6.7 V 9.85 k Ω10.2 V 2.42 k Ω
2.85 V 190 k Ω4.4 V 29.6 k Ω6.8 V 9.47 k Ω10.4 V 2.20 k Ω
2.90 V 165 k Ω4.5 V 27.8 k Ω6.9 V 9.11 k Ω10.6 V 1.98 k Ω
2.95 V 146 k Ω4.6 V 26.2 k Ω7.0 V 8.76 k Ω10.8 V 1.78 k Ω
3.00 V 131 k Ω4.7 V 24.7 k Ω7.1 V 8.43 k Ω11.0 V 1.58 k Ω
3.05 V 118 k Ω4.8 V 23.3 k Ω7.2 V 8.11 k Ω11.2 V 1.40 k Ω
3.10 V 108 k Ω4.9 V 22.1 k Ω7.3 V 7.81 k Ω11.4 V 1.22 k Ω
3.15 V 99.1 k Ω5.0 V 21.0 k Ω7.4 V 7.52 k Ω11.6 V 1.05 k Ω
3.20 V 91.5 k Ω5.1 V 19.9 k Ω7.5 V 7.24 k Ω11.8 V 889 Ω
3.25 V 85.0 k Ω5.2 V 18.9 k Ω7.6 V 6.97 k Ω12.0 V 734 Ω
3.30 V 79.3 k Ω5.3 V 18.0 k Ω7.7 V 6.71 k Ω12.2 V 585 Ω
3.35 V 74.2 k Ω5.4 V 17.2 k Ω7.8 V 6.46 k Ω12.4 V 442 Ω
3.40 V 69.8 k Ω5.5 V 16.4 k Ω7.9 V 6.22 k Ω12.6 V 305 Ω
3.45 V 65.7 k Ω5.6 V 15.6 k Ω8.0 V 5.99 k Ω
3.50 V 62.1 k Ω5.7 V 15.0 k Ω8.2 V 5.55 k Ω
3.55 V 58.9 k Ω5.8 V 14.3 k Ω8.4 V 5.14 k Ω
3.60 V 55.9 k Ω5.9 V 13.7 k Ω8.6 V 4.76 k Ω
3.65 V 53.2 k Ω6.0 V 13.1 k Ω8.8 V 4.40 k Ω
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 11
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GND GND
PTN78060H
14
6
2
3
Adjust
GND GND
VO
VI
VIVO
Inhibit
7
5
Sense
+
C3
C2
C1
4.7 Fm
4.7 Fm
4.7 Fm
Ceramic
Ceramic
Ceramic
RSET
0.05W
1%
C4
100 Fm
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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(1) A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/ ° C (orbetter). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 7using dedicated PCB traces.(2) Never connect capacitors from V
O
Adjust to either GND or V
O
. Any capacitance added to the V
O
Adjust pin affects thestability of the regulator.
Figure 28. PTN78060H V
O
Adjust Resistor Placement
Table 4. PTN78060H Output Voltage Set-Point Resistor ValuesV
O
R
SET
V
O
R
SET
V
O
R
SET
11.85 V 2633 k Ω13.50 V 34.3 k Ω17.20 V 6.12 k Ω
11.90 V 896 k Ω13.65 V 30.9 k Ω17.40 V 5.66 k Ω
11.95 V 538 k Ω13.80 V 28.1 k Ω17.60 V 5.23 k Ω
12.00 V 451 k Ω13.95 V 25.6 k Ω17.80 V 4.83 k Ω
12.10 V 242 k Ω14.10 V 23.5 k Ω18.00 V 4.46 k Ω
12.15 V 204 k Ω14.25 V 21.6 k Ω18.20 V 4.11 k Ω
12.20 V 176 k Ω14.40 V 19.9 k Ω18.40 V 3.79 k Ω
12.25 V 154 k Ω14.55 V 18.5 k Ω18.60 V 3.48 k Ω
12.30 V 138 k Ω14.70 V 17.2 k Ω18.80 V 3.19 k Ω
12.35 V 124 k Ω14.85 V 16.0 k Ω19.00 V 2.91 k Ω
12.40 V 113 k Ω15.00 V 14.9 k Ω19.20 V 2.65 k Ω
12.45 V 103 k Ω15.15 V 13.9 k Ω19.40 V 2.41 k Ω
12.50 V 94.9 k Ω15.30 V 13.1 k Ω19.60 V 2.18 k Ω
12.55 V 87.9 k Ω15.45 V 12.3 k Ω19.80 V 1.95 k Ω
12.60 V 81.8 k Ω15.60 V 11.5 k Ω20.00 V 1.74 k Ω
12.65 V 76.4 k Ω15.75 V 10.8 k Ω20.20 V 1.54 k Ω
12.70 V 71.7 k Ω15.90 V 10.2 k Ω20.40 V 1.35 k Ω
12.75 V 67.5 k Ω16.05 V 9.59 k Ω20.60 V 1.17 k Ω
12.80 V 63.7 k Ω16.20 V 9.03 k Ω20.80 V 995 Ω
12.85 V 60.2 k Ω16.35 V 8.51 k Ω21.00 V 829 k Ω
12.90 V 57.1 k Ω16.50 V 8.03 k Ω21.20 V 669 Ω
12.95 V 54.3 k Ω16.65 V 7.57 k Ω21.40 V 516 Ω
13.00 V 51.7 k Ω16.80 V 7.14 k Ω21.80 V 229 Ω
13.05 V 49.3 k Ω17.10 V 6.36 k Ω22.00 V 94 Ω
12 Submit Documentation Feedback Copyright © 2004 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTN78060W PTN78060H
CAPACITOR RECOMMENDATIONS for the PTN78060 WIDE-OUTPUT
PTN78060W Input Capacitor
PTN78060H Input Capacitor
Output Capacitor
Ceramic Capacitors
PTN78060W , PTN78060H
www.ti.com
................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
ADJUST POWER MODULES
PTN78060W has a minimum requirement for input capacitance of 2.2 µ F of ceramic capacitance. The dielectricmay have either an X5R or X7R temperature characteristic. Ceramic capacitors should be located within 0.5 inch(1,27 cm) of the regulator's input pins. Electrolytic capacitors can be used at the input, but only in addition to therequired ceramic capacitance. The minimum ripple current rating for any nonceramic capacitance must be atleast 500 mA rms for V
O
≤5.5 V. For V
O
> 5.5 V, the minimum ripple current rating is 750 mA rms. The ripplecurrent rating of electrolytic capacitors is a major consideration when they are used at the input. This ripplecurrent requirement can be reduced by placing more ceramic capacitors at the input, in addition to the minimumrequired 2.2 µ F.
Tantalum capacitors are not recommended for use at the input bus, as none were found to meet the minimumvoltage rating of 2 × (maximum dc voltage + ac ripple). The 2 × rating is standard practice for regular tantalumcapacitors to ensure reliability. Polymer-tantalum capacitors are more reliable, and are available with a maximumrating of typically 20 V. These can be used with input voltages up to 16 V.
PTN78060H has a minimum requirement for input capacitance of 14.1 µ F (3 × 4.7 µ F) of ceramic capacitance.The dielectric may have either an X5R or X7R temperature characteristic. Ceramic capacitors should be locatedwithin 0.5 inch (1,27 cm) of the regulator's inpt pins. Electrolytic capacitors can be used at the input, but only inaddition to the required ceramic capacitance. The minimum ripple current rating for any nonceramic capacitancemust be at least 400 mA rms. The ripple current rating of electrolytic capacitors is a major consideration whenthey are used at the input. This ripple current requirement can be reduced by placing more ceramic capacitors atthe input, in addition to the minimum required 14.1 µ F.
Tantalum capacitors are not recommended for use at the input bus, as none were found to meet the minimumvoltage rating of 2 × (maximum dc voltage + ac ripple). The 2 × rating is standard practice for regular tantalumcapacitors to ensure reliability. Polymer-tantalum capacitors are more reliable, and are available with a maximumrating of typically 20 V. These can be used with input voltages up to 16 V.
The minimum capacitance required to ensure stability is a 100- µ F capacitor. Either ceramic or electrolytic-typecapacitors can be used. The minimum ripple current rating for the nonceramic capacitance must be at least150 mA rms. The stability of the module and voltage tolerances are compromised if the capacitor is not placednear the output bus pins. A high-quality, computer-grade electrolytic capacitor should be adequate. A ceramiccapacitor can be also be located within 0.5 inch (1,27 cm) of the output pin.
For applications with load transients (sudden changes in load current), the regulator response improves withadditional capacitance. Additional electrolytic capacitors should be located close to the load circuit. Thesecapacitors provide decoupling over the frequency range, 2 kHz to 150 kHz. Aluminum electrolytic capacitors aresuitable for ambient temperatures above 0 ° C. For operation below 0 ° C, tantalum or Os-Con type capacitors arerecommended. When using one or more nonceramic capacitors, the calculated equivalent ESR should be nolower than 10 mΩ(17 m Ωusing the manufacturer's maximum ESR for a single capacitor). A list of capacitorsand vendors are identified in Table 5 and Table 6 , the recommended capacitor tables.
Above 150 kHz, the performance of aluminum electrolytic capacitors becomes less effective. To further reducethe reflected input ripple current, or improve the output transient response, multilayer ceramic capacitors must beadded. Ceramic capacitors have low ESR, and their resonant frequency is higher than the bandwidth of theregulator. When placed at the output, their combined ESR is not critical as long as the total value of ceramiccapacitance does not exceed 200 µ F.
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 13
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Tantalum Capacitors
Capacitor Table
Designing for Load Transients
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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Tantalum-type capacitors may be used at the output, and are recommended for applications where the ambientoperating temperature can be less than 0 ° C. The AVX TPS, Sprague 593D/594/595, and KemetT495/T510/T520 capacitors series are suggested over many other tantalum types due to their rated surge, powerdissipation, and ripple current capability. As a caution, many general-purpose tantalum capacitors haveconsiderably higher ESR, reduced power dissipation, and lower ripple current capability. These capacitors arealso less reliable as they have lower power dissipation and surge current ratings. Tantalum capacitors that do nothave a stated ESR or surge current rating are not recommended for power applications. When specifyingOs-Con and polymer tantalum capacitors for the output, the minimum ESR limit is encountered well before themaximum capacitance value is reached.
The capacitor tables, Table 5 and Table 6 , identify the characteristics of capacitors from a number of vendorswith acceptable ESR and ripple current (rms) ratings. The recommended number of capacitors required at boththe input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitorsfrom other vendors are available with comparable specifications. Those listed are for guidance. The rms ratingand ESR (at 100 kHz) are critical parameters necessary to ensure both optimum regulator performance and longcapacitor life.
The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of1 A/ µ s. The typical voltage deviation for this load transient is given in the data sheet specification table using therequired value of output capacitance. As the di/dt of a transient is increased, the response of a converter'sregulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation ofany dc/dc converter once the speed of the transient exceeds its bandwidth capability. If the target applicationspecifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional outputcapacitor decoupling. In these cases, special attention must be paid to the type, value, and ESR of thecapacitors selected.
If the transient performance requirements exceed those specified in the data sheet, the selection of outputcapacitors becomes more important. Review the minimum ESR in the characteristic data sheet for details on thecapacitance maximum.
Table 5. Recommended Input/Output Capacitors (PTN78060W)CAPACITOR CHARACTERISTICS QUANTITY
85 ° CCAPACITOR VENDOR/
EQUIVALENT
VENDORWORKING MAXIMUM PHYSICALCOMPONENT
VALUE SERIES INPUT OUTPUT
NUMBERVOLTAGE RIPPLE SIZESERIES
( µ F) RESISTANCE BUS BUS(V) CURRENT (mm)(ESR) ( Ω)
(I
RMS
) (mA)
Panasonic FC( Radial) 50 180 0.119 850 10 × 16 1 1 EEUFC1H181
FK (SMD) 50 330 0.12 900 12.50 × 13.5 1
(1)
1 EEVFK1H331Q
United Chemi-Con PXA (SMD) 16 180 0.016 4360 8 × 12 ≤1 PXA16VC180MF60
1
(1)
(V
O
< 14 V)
LXZ 50 120 0.16 620 10 × 12,5 1 LXZ50VB121M10X12LL
1
(1)
(V
I
< 32 V)
MVY(SMD) 50 100 0.300 500 10 × 10 1 1 MVY50VC101M10X10TP
(V
O
≤5.5 V)
Nichicon UWG (SMD) 50 100 0.300 500 10 × 10 1 1 UWG1H101MNR1GS
F550 (Tantalum) 10 100 0.055 2000 7,7 × 4,3 N/R
(2)
≤3
(3)
F551A107MN (V
O
≤5 V)
HD 50 120 0.072 979 10 × 12,5 1 1 UHD1H151MHR
Sanyo Os-Con SVP (SMD) 20 100 0.024 2500 8 × 12 1
(1)
≤2 20SVP100M (V
I
≤16 V)
SP 16 100 0.032 2890 10 × 5 1
(1)
≤2 16SP100M (V
I
≤14 V)
(1) The voltage rating of the input capacitor must be selected for the desired operating input voltage range of the regulator. To operate theregulator at a higher input voltage, select a capacitor with the next higher voltage rating.(2) Not recommended (N/R). The voltage rating does not meet the minimum operating limits in most applications.(3) The maximum voltage rating of the capacitor must be selected for the desired set-point voltage (V
O
). To operate at a higher outputvoltage select a capacitor with a higher voltage rating.
14 Submit Documentation Feedback Copyright © 2004 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTN78060W PTN78060H
PTN78060W , PTN78060H
www.ti.com
................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
Table 5. Recommended Input/Output Capacitors (PTN78060W) (continued)CAPACITOR CHARACTERISTICS QUANTITY
85 ° CCAPACITOR VENDOR/
EQUIVALENT
VENDORWORKING MAXIMUM PHYSICALCOMPONENT
VALUE SERIES INPUT OUTPUT
NUMBERVOLTAGE RIPPLE SIZESERIES
( µ F) RESISTANCE BUS BUS(V) CURRENT (mm)(ESR) ( Ω)
(I
RMS
) (mA)
20 100 0.085 1543 7,3 L × 4,3 N/R
(2)
≤3 TPSV107M020R0085W × 4,1 H (V
O
≤10 V)AVX Tantalum TPS (SMD)
20 100 0.200 > 817 N/R
(2)
≤3 TPSE107M020R0200
(V
O
≤10 V)
Murata X5R Ceramic 6.3 100 0.002 > 1000 3225 N/R
(2)
≤2 GRM32ER60J107M
(V
O
≤5.5 V)
TDK X5R Ceramic 6.3 100 0.002 > 1000 3225 N/R
(2)
≤2 C3225X5R0J107MT
(V
O
≤5.5 V)
Murata X5R Ceramic 16 47 0.002 > 1000 3225 1
(1)
≤4 GRM32ER61C476M
(V
o
~ V
I
≤13.5 V)
Kemet X5R Ceramic 6.3 47 0.002 > 1000 3225 N/R
(2)
≤4 C1210C476K9PAC
(V
O
≤5.5 V)
TDK X5R Ceramic 6.3 47 0.002 > 1000 3225 N/R
(2)
≤4 C3225X5R0J476MT
(V
O
≤5.5 V)
Murata X5R Ceramic 6.3 47 0.002 > 1000 3225 N/R
(2)
≤4 GRM42-2X5R476M6.3
(V
O
≤5.5 V)
TDK X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥1
(4)
1 C3225X7R1E225KT/MT
(V
O
≤20 V)
Murata X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥1
(4)
1 GRM32RR71E225K
(V
O
≤20 V)
Kemet X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥1
(5)
1 C1210C225K3RAC
(V
O
≤20 V)
AVX X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥1
(5)
1 C12103C225KAT2A
(V
O
≤20 V)
Kemet X7R Ceramic 50 1.0 0.002 > 1000 3225 ≥2
(6)
1 C1210C105K5RAC
Murata X7R Ceramic 50 4.7 0.002 > 1000 3225 ≥1 1 GRM32ER71H475KA88L
TDK X7R Ceramic 50 2.2 0.002 > 1000 3225 ≥1 1 C3225X7R1H225KT
Murata X7R Ceramic 50 1.0 0.002 > 1000 3225 ≥2
(6)
1 GRM32RR71H105KA01L
TDK X7R Ceramic 50 1.0 0.002 > 1000 3225 ≥2
(6)
1 C3225X7R1H105KT
Kemet Radial Through-hole 50 1.0 0.002 > 1000 5,08 × 7,62 ≥2
(6)
1 C330C105K5R5CA× 9,14 H
Murata Radial Through-hole 50 2.2 0.004 > 1000 10 H × 10 W ≥1 1 RPER71H2R2KK6F03× 4 D
(4) The maximum rating of the ceramic capacitor limits the regulator ' s operating input voltage to 20 V. Select an alternative ceramiccomponent to operate at a higher input voltage.(5) The maximum rating of the ceramic capacitor limits the regulator ' s operating input voltage to 20 V. Select an alternative ceramiccomponent to operate at a higher input voltage.(6) A total capacitance of 2 µ F is an acceptable replacement value for a single 2.2- µ F ceramic capacitor
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 15
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Power-Up Characteristics
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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Table 6. Recommended Input/Output Capacitors (PTN78060H)CAPACITOR CHARACTERISTICS QUANTITY
85 ° CCAPACITOR VENDOR/
EQUIVALENT
VENDORWORKING MAXIMUM PHYSICALCOMPONENT
VALUE SERIES INPUT OUTPUT
NUMBERVOLTAGE RIPPLE SIZESERIES
( µ F) RESISTANCE BUS BUS(V) CURRENT (mm)(ESR) ( Ω)
(I
RMS
) (mA)
Panasonic FC( Radial) 50 100 0.162 615 10 × 12.5 1 ≥1 EEUFC1H101
FK (SMD) 50 150 0.18 670 10 × 10,2 1
(1)
≥1 EEVFK1H151P
United Chemi-Con PXA (SMD) 16 180 0.016 4360 8 × 12 ≤1 PXA16VC180MF60N/R
(2)
(V
O
< 14 V)
LXZ 50 120 0.160 620 10 × 12,5 1
(1)
≥1 LXZ50VB121M10X12LL
MVY(SMD) 50 100 0.300 500 10 × 10 1 ≥1 MVY50VC101M10X10TP
Nichicon UWG (SMD) 50 100 0.300 500 10 × 10 1 ≥1 UWG1H101MNR1GS
HD 50 120 0.072 979 10 × 12,5 1 ≥1 UHD1H151MHR
Sanyo Os-Con SVP (SMD) 20 100 0.024 2500 8 × 12 1
(1)
≤2 20SVP100M (V
I
~V
O
≤16 V)
SP 20 120 0.024 3110 8 × 10,5 1
(1)
≤2 20SP120M (V
I
~V
O
≤16 V)
TDK X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥6
(3)
1 C3225X7R1E225KT/MT
(V
I
~V
O
≤20 V)
Murata X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥6
(3)
1 GRM32RR71E225K
(V
I
~V
O
≤20 V)
Kemet X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥6
(3)
1 C1210C225K3RAC
(V
I
~V
O
≤20 V)
AVX X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥6
(3)
1 C12103C225KAT2A
(V
I
~V
O
≤20 V)
Murata X7R Ceramic 50 4.7 0.002 > 1000 3225 ≥3 1 GRM32ER71H475KA88L
TDK X7R Ceramic 50 3.3 0.002 > 1000 3225 ≥4
(4)
1 CKG45NX7R1H335M
Murata Radial Through-hole 50 3.3 0.003 > 1000 12,5 H × ≥4
(5)
1 RPER71H3R3KK6F0312,5 W × 4
Kemet Radial Through-hole 50 4.7 0.003 > 1000 5,08 × 7,62 ≥3 1 C350C475K5R5CA× 9,14
(1) The voltage rating of the input capacitor must be selected for the desired operating input voltage range of the regulator. To operate theregulator at a higher input voltage, select a capacitor with the next higher voltage rating.(2) Not recommended (N/R). The voltage rating does not meet the minimum operating limits in most applications.(3) The maximum rating of the ceramic capacitor limits the regulator ' s operating input voltage to 20 V. Select an alternative ceramiccomponent to operate at a higher input voltage.(4) A total capacitance of 13.2 F is an acceptable replacement value for 3 × 4.7 F ceramic capacitors(5) A total capacitance of 2 µ F is an acceptable replacement value for a single 2.2- µ F ceramic capacitor
When configured per the standard application, the PTN78060 power module produces a regulated output voltagefollowing the application of a valid input source voltage. During power up, internal soft-start circuitry slows therate that the output voltage rises, thereby limiting the amount of in-rush current that can be drawn from the inputsource. The soft-start circuitry introduces a short time delay (typically 5 ms – 10 ms) into the power-upcharacteristic. This is from the point that a valid input source is recognized. Figure 29 shows the power-upwaveforms when operating from a 12-V input and with the output voltage adjusted to 5 V. The waveforms weremeasured with a 2.8-A resistive load.
16 Submit Documentation Feedback Copyright © 2004 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTN78060W PTN78060H
t-Time=5ms/div
II(2 A/div)
VO(2V/div)
VI(5V/div)
Undervoltage Lockout
Current Limit Protection
Overtemperature Protection
Output Voltage Sense
PTN78060W , PTN78060H
www.ti.com
................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
Figure 29. Power-Up Waveforms
The undervoltage lockout (UVLO) circuit prevents the module from attempting to power up until the input voltageis above the UVLO threshold. This is to prevent the modulte from drawing excessive current from the inputsource at power up. Below the UVLO threshold, the module is held off.
The module is protected against load faults with a continuous current limit characteristic. Under a load-faultcondition, the output current increases to the current limit threshold. Attempting to draw current that exceeds thecurrent limit threshold causes the module to progressively reduce its output voltage. Current is continuouslysupplied to the fault until the fault is removed. Once it is removed, the output voltage promptly recovers. Whenlimiting output current, the regulator experiences higher power dissipation, which increases its temperature. If thetemperature increase is excessive, the module overtemperature protection begins to periodically turn the outputvoltage off.
A thermal shutdown mechanism protects the module's internal circuitry against excessively high temperatures. Arise in temperature may be the result of a drop in airflow, a high ambient temperature, or a sustained current limitcondition. If the internal temperature rises excessively, the module turns itself off, reducing the output voltage tozero. The module excercises a soft-start power up when the sensed temperature has decreased by about 10 ° Cbelow the trip point.
NOTE:Overtemperature protection is a last resort mechanism to prevent damage to the module. It should not berelied on as permanent protection against thermal stress. Always operate the module within its temperaturederated limits, for the worst-case operating conditions of output current, ambient temperature, and airflow.Operating the module above these limits, albeit below the thermal shutdown temperature, reduces the long-termreliability of the module.
An external voltage sense improves the load regulation performance of the module by enabling it to compensatefor any IR-voltage drop between the module and the load circuit. This voltage drop is caused by the flow ofcurrent through the resistance in the printed-circuit board connections.
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Link(s): PTN78060W PTN78060H
Output On/Off Inhibit
Inhibit
GND GND
PTN78060
14
6
2
3
Adjust
GND GND
VO
VI
V =12V
IV =5V
O
Inhibit
7
5
Sense
+L
O
A
D
CI
2.2 Fm
Ceramic RSET
21kW
0.05W
1%
CO
100 Fm
Q1
BSS138
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
www.ti.com
To use the output voltage sense feature, simply connect the V
O
Sense input (pin 5) to V
O
, close to the devicethat draws the most supply current. If an external voltage sense is not desired, the V
O
Sense input may be leftopen circuit. An internal resistor (15 Ωor less), connected between this input and V
O
, ensures that the outputremains in regulation.
With V
O
Sense connected, the difference between the voltage measure directly between the V
O
and GND, andthat measured from V
O
Sense to GND, represents the amount of IR-voltage drop being compensated by theregulator. This should be limited to a maximum of 0.3 V.
Note:The external voltage sense is not designed to compensate for the forward drop of nonlinear orfrequency-dependent components that may be placed in series with the regulator's output. Examples includeOR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the externalsense connection, they are effectively placed inside the regulation control loop. This can adversely affect thestability of the module.
The inhibit feature can be used wherever there is a requirement for the output voltage to be turned off. Thepower module functions normally when the Inhibit control (pin 3) is left open-circuit, providing a regulated outputwhenever a valid source voltage is connected to V
I
with respect to GND. Figure 30 shows the the circuit used todemonstrate the inhibit function. Note the discrete transistor (Q1). Turning Q1 on applies a low voltage to theInhibit control pin and turns the module off. The output voltage decays as the load circuit discharges thecapacitance. The current drawn at the input is reduced to typically 17 mA. If Q1 is then turned off, the moduleexecutes a soft-start power up. A regulated output voltage is produced within 20 ms. Figure 31 shows the typicalrise in the output voltage, following the turn off of Q1. The turn off of Q1 corresponds to the fall in the waveform,Q1 Vgs. The waveforms were measured with a 2.8-A resistive load.
Figure 30. On/Off Inhibit Control Circuit
18 Submit Documentation Feedback Copyright © 2004 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTN78060W PTN78060H
t-Time=5ms/div
VO(2V/div)
II(1 A/div)
Q1VGS (10V/div)
Optional Input/Output Filters
Input/Output Capacitors
PTN78060W , PTN78060H
www.ti.com
................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
Figure 31. Power-Up Response From Inhibit Control
Power modules include internal input and output ceramic capacitors in all of their designs. However, someapplications require much lower levels of either input reflected or output ripple/noise. This application describesvarious filters and design techniques found to be successful in reducing both input and output ripple/noise.
The easiest way to reduce output ripple and noise is to add one or more 1- µ F ceramic capacitors, such as C4shown in Figure 32 . Ceramic capacitors should be placed close to the output power terminals. A single 2.2- µ Fcapacitor reduces the output ripple/noise by 10% to 30% for modules with a rated output current of less than 3 A.(Note: C3 is recommended to improve the regulators transient response, and does not reduce output ripple andnoise.)
Switching regulators draw current from the input line in pulses at their operating frequency. The amount ofreflected (input) ripple/noise generated is directly proportional to the equivalent source impedance of the powersource including the impedance of any input lines. The addition of C1, minimum 2.2- µ F ceramic capacitor, nearthe input power pins, reduces reflected conducted ripple/noise by up to 20%.
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 19
Product Folder Link(s): PTN78060W PTN78060H
PTN78060W
2 6
5
+
7 4
Rset
GND Adjust
Sense
A BC
13
GNDGND
UDG−05086
VO
VIVO
VI
Inhibit
C1
1 µF
50 V
Ceramic
C2
2.2 µF
50 V
Ceramic
(Required)
C3
100 µF
(Required)
C4
2.2 µF
Ceramic
RSET
πFilters
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
www.ti.com
A. See specifications for required value and type. For PTN78060H, C
C2
= 3 × 4.7 µF.B. See Application Information section for suggested value and type.C. For PTN78060H, C
C1
≥4.7 µF.
Figure 32. Adding High-Frequency Bypass Capacitors To The Input and Output
If a further reduction in ripple/noise level is required for an application, higher order filters must be used. A π(pi)filter, employing a ferrite bead (Fair-Rite part number 2673000701 or equivalent) in series with the input or outputterminals of the regulator reduces the ripple/noise by at least 20 db (see Figure 33 and Figure 34 ). In order forthe inductor to be effective ceramic capacitors are also required. (Note: see Capacitor Recommendations foradditional information on vendors and component suggestions.)
These inductors plus ceramic capacitors form an excellent filter because of the rejection at the switchingfrequency (650 kHz - 1 MHz). The placement of this filter is critical. It must be located as close as possible to theinput or output pins to be effective. The ferrite bead is small (12,5 mm × 3 mm), easy to use, low cost, and haslow dc resistance. Fair-Rite also manufactures a surface-mount bead (part number 2773021447). It is rated to 5A, and can be used on the output bus. As an alternative, suitably rated 1- µ H to 5- µ H wound inductors can beused in place of the ferrite inductor bead.
20 Submit Documentation Feedback Copyright © 2004 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTN78060W PTN78060H
PTN78060W
2 6
5
+
7 4 C5
Vo
Inhibit GND Adjust
Vo
Sense
13
GNDGND
D+
GND
AB C
UDG−05087
L2
1 µH to 5 µH
L1
1 µH to 5 µH
C1
1 µF
50 V
Ceramic
C2
2.2 µF
50 V
Ceramic
(Required)
RSET C4
2.2 µF
Ceramic
C3
100 µF
(Required)
VI
VI
10
15
20
25
30
35
40
45
0 0.5 1 1.5 2 2.5 3
1 MHz
600 kHz
Attenuation − dB
Load Current − A
PTN78060W , PTN78060H
www.ti.com
................................................................................................................................................... SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009
A. See specifications for required value and type. For PTN78060H, C
C2
= 3 × 4.7 µF.B. See Application Information section for suggested value and type.C. Recommended whenever I
O
> 2A.D. For PTN78060H, C
C1
≥4.7 µF.
Figure 33. Adding πFilters (I
O
≤3 A)
Figure 34. π-Filter Attenuation vs. Load Current
Copyright © 2004 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Link(s): PTN78060W PTN78060H
PACKAGE OPTION ADDENDUM
www.ti.com 13-Nov-2010
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
PTN78060HAH ACTIVE Through-
Hole Module EUW 7 36 Pb-Free (RoHS) SN N / A for Pkg Type Request Free Samples
PTN78060HAS ACTIVE Surface
Mount Module EUY 7 36 TBD SNPB Level-1-235C-UNLIM/
Level-3-260C-168HRS Request Free Samples
PTN78060HAST ACTIVE Surface
Mount Module EUY 7 250 TBD SNPB Level-1-235C-UNLIM/
Level-3-260C-168HRS Purchase Samples
PTN78060HAZ ACTIVE Surface
Mount Module EUY 7 36 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Request Free Samples
PTN78060HAZT ACTIVE Surface
Mount Module EUY 7 250 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples
PTN78060WAD ACTIVE Through-
Hole Module EUW 7 36 Pb-Free (RoHS) SN N / A for Pkg Type Purchase Samples
PTN78060WAH ACTIVE Through-
Hole Module EUW 7 36 Pb-Free (RoHS) SN N / A for Pkg Type Request Free Samples
PTN78060WAS ACTIVE Surface
Mount Module EUY 7 36 TBD SNPB Level-1-235C-UNLIM/
Level-3-260C-168HRS Request Free Samples
PTN78060WAST ACTIVE Surface
Mount Module EUY 7 250 TBD SNPB Level-1-235C-UNLIM/
Level-3-260C-168HRS Purchase Samples
PTN78060WAZ ACTIVE Surface
Mount Module EUY 7 36 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Request Free Samples
PTN78060WAZT ACTIVE Surface
Mount Module EUY 7 250 Pb-Free (RoHS) SNAGCU Level-3-260C-168 HR Purchase Samples
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PACKAGE OPTION ADDENDUM
www.ti.com 13-Nov-2010
Addendum-Page 2
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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