−
+
QS
1.25-V
Reference
Regulator
R
CT
Ipk
Oscillator
Q2
Q1
Switch
Collector
4
Switch
Emitter
Timing
Capacitor
GND
3
2
18
7
6
5
Comparator
Inverting Input
VCC
Ipk
Sense
Drive
Collector
100 W
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MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
MC3x063A 1.5-A Peak Boost/Buck/Inverting Switching Regulators
1 Features 3 Description
The MC33063A and MC34063A devices are easy-to-
1• Wide Input Voltage Range: 3 V to 40 V use ICs containing all the primary circuitry needed for
• High Output Switch Current: Up to 1.5 A building simple DC-DC converters. These devices
• Adjustable Output Voltage primarily consist of an internal temperature-
compensated reference, a comparator, an oscillator,
• Oscillator Frequency Up to 100 kHz a PWM controller with active current limiting, a driver,
• Precision Internal Reference: 2% and a high-current output switch. Thus, the devices
• Short-Circuit Current Limiting require minimal external components to build
converters in the boost, buck, and inverting
• Low Standby Current topologies.
2 Applications The MC33063A device is characterized for operation
from –40°C to 85°C, while the MC34063A device is
• Blood Gas Analyzers: Portable characterized for operation from 0°C to 70°C.
• Cable Solutions
• HMIs (Human Machine Interfaces) Device Information(1)
• Telecommunications PART NUMBER PACKAGE (PIN) BODY SIZE
• Portable Devices SOIC (8) 4.90 mm × 3.91 mm
• Consumer & Computing MC3x063A SON (8) 4.00 mm × 4.00 mm
PDIP (8) 9.81 mm × 6.35 mm
• Test & Measurement
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
Table of Contents
8.1 Overview................................................................... 7
1 Features.................................................................. 18.2 Functional Block Diagram......................................... 7
2 Applications ........................................................... 18.3 Feature Description................................................... 7
3 Description............................................................. 18.4 Device Functional Modes.......................................... 7
4 Simplified Schematic............................................. 19 Application and Implementation .......................... 8
5 Revision History..................................................... 29.1 Application Information.............................................. 8
6 Pin Configuration and Functions......................... 39.2 Typical Application.................................................... 9
7 Specifications......................................................... 410 Power Supply Recommendations ..................... 17
7.1 Absolute Maximum Ratings ...................................... 411 Layout................................................................... 17
7.2 ESD Ratings.............................................................. 411.1 Layout Guidelines ................................................. 17
7.3 Recommended Operating Conditions....................... 411.2 Layout Example .................................................... 17
7.4 Thermal Information.................................................. 412 Device and Documentation Support................. 18
7.5 Electrical Characteristics—Oscillator........................ 412.1 Related Links ........................................................ 18
7.6 Electrical Characteristics—Output Switch................. 512.2 Trademarks........................................................... 18
7.7 Electrical Characteristics—Comparator.................... 512.3 Electrostatic Discharge Caution............................ 18
7.8 Electrical Characteristics—Total Device................... 512.4 Glossary................................................................ 18
7.9 Typical Characteristics.............................................. 613 Mechanical, Packaging, and Orderable
8 Detailed Description.............................................. 7Information........................................................... 18
5 Revision History
Changes from Revision M (January 2011) to Revision N Page
• Added Applications,Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,
Feature Description section, Device Functional Modes,Application and Implementation section, Power Supply
Recommendations section, Layout section, Device and Documentation Support section, and Mechanical,
Packaging, and Orderable Information section. ..................................................................................................................... 1
• Deleted Ordering Information table. ....................................................................................................................................... 1
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Product Folder Links: MC33063A MC34063A
1
2
3
4
8
7
6
5
Switch Collector
Switch Emitter
Timing Capacitor
GND
Driver Collector
Ipk
VCC
Comparator Inverting Input
D (SOIC) OR P (PDIP) PACKAGE
(TOP VIEW)
DRJ (QFN) PACKAGE
(TOP VIEW)
Comparator Inverting Input
Switch Collector
2
3
4
18
7
6
5
Switch Emitter
Timing Capacitor
GND
VCC
Ipk
Driver Collector
†The exposed thermal pad is electrically bonded internally to pin 4 (GND) .
†
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
6 Pin Configuration and Functions
Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
Switch Collector 1 I/O High-current internal switch collector input.
Switch Emitter 2 I/O High-current internal switch emitter output.
Timing Capacitor 3 — Attach a timing capacitor to change the switching frequency.
GND 4 — Ground
Comparator 5 I Attach to a resistor divider network to create a feedback loop.
Inverting Input
VCC 6 I Logic supply voltage. Tie to VIN.
IPK 7 I Current-limit sense input.
Driver Collector 8 I/O Darlington pair driving transistor collector input.
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,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VCC Supply voltage 40 V
VIR Comparator inverting input voltage range –0.3 40 V
VC(switch) Switch collector voltage 40 V
VE(switch) Switch emitter voltage VPIN1 = 40 V 40 V
VCE(switch) Switch collector to switch emitter voltage 40 V
VC(driver) Driver collector voltage 40 V
IC(driver) Driver collector current 100 mA
ISW Switch current 1.5 A
TJOperating virtual junction temperature 150 °C
Tstg Storage temperature range –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
7.2 ESD Ratings VALUE UNIT
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) 2500
V(ESD) Electrostatic discharge V
Charged device model (CDM), per JEDEC specification JESD22-C101, 1500
all pins(2)
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions MIN MAX UNIT
VCC Supply voltage 3 40 V
MC33063A –40 85
TAOperating free-air temperature °C
MC34063A 0 70
7.4 Thermal Information MC33063A
THERMAL METRIC(1) D DRJ P UNIT
8 PINS
RθJA Junction-to-ambient thermal resistance 97 41 85 °C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).
7.5 Electrical Characteristics—Oscillator
VCC = 5 V, TA= full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS TAMIN TYP MAX UNIT
fosc Oscillator frequency VPIN5 = 0 V, CT= 1 nF 25°C 24 33 42 kHz
Ichg Charge current VCC = 5 V to 40 V 25°C 24 35 42 μA
Idischg Discharge current VCC = 5 V to 40 V 25°C 140 220 260 μA
Idischg/Ichg Discharge-to-charge current ratio VPIN7 = VCC 25°C 5.2 6.5 7.5 —
VIpk Current-limit sense voltage Idischg = Ichg 25°C 250 300 350 mV
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7.6 Electrical Characteristics—Output Switch
VCC = 5 V, TA= full operating range (unless otherwise noted) (see block diagram)(1)
PARAMETER TEST CONDITIONS TAMIN TYP MAX UNIT
Saturation voltage –
VCE(sat) ISW = 1 A, pins 1 and 8 connected Full range 1 1.3 V
Darlington connection
Saturation voltage – ISW = 1 A, RPIN8 = 82 Ωto VCC,
VCE(sat) Full range 0.45 0.7 V
non-Darlington connection(2) forced β∼20
hFE DC current gain ISW = 1 A, VCE = 5 V 25°C 50 75 —
IC(off) Collector off-state current VCE = 40 V Full range 0.01 100 μA
(1) Low duty-cycle pulse testing is used to maintain junction temperature as close to ambient temperature as possible.
(2) In the non-Darlington configuration, if the output switch is driven into hard saturation at low switch currents (≤300 mA) and high driver
currents (≥30 mA), it may take up to 2 μs for the switch to come out of saturation. This condition effectively shortens the off time at
frequencies ≥30 kHz, becoming magnified as temperature increases. The following output drive condition is recommended in the non-
Darlington configuration:
Forced βof output switch = IC,SW / (IC,driver – 7 mA) ≥10, where ∼7 mA is required by the 100-Ωresistor in the emitter of the driver to
forward bias the Vbe of the switch.
7.7 Electrical Characteristics—Comparator
VCC = 5 V, TA= full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS TAMIN TYP MAX UNIT
25°C 1.225 1.25 1.275
Vth Threshold voltage V
Full range 1.21 1.29
ΔVth Threshold-voltage line regulation VCC = 5 V to 40 V Full range 1.4 5 mV
IIB Input bias current VIN = 0 V Full range –20 –400 nA
7.8 Electrical Characteristics—Total Device
VCC = 5 V, TA= full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS TAMIN MAX UNIT
VCC = 5 V to 40 V, CT= 1 nF,
ICC Supply current VPIN7 = VCC, VPIN5 > Vth, Full range 4 mA
VPIN2 = GND, All other pins open
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0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IC, Collector Current (A)
VCE(SAT), Output Switch
Saturation Voltage (V)
Darlington Connection
VCC = 5 V
Pin 7 = VCC
Pin 2, 3, 5 = GND
TA= 25°C
Force Beta = 20
0
0 1
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
0 5 10 15 20 25 30 35 40
VCC, Supply Voltage (V)
ICC, Supply Current (mA)
CT= 1 nF
Pin 7 = VCC
Pin 2 = GND
TA= 25°C
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IE, Emitter Current (A)
VCE(SAT), Output Switch
Saturation Voltage (V)
VCC = 5 V
Pin 1, 7, 8 = VCC
Pin 3, 5 = GND
TA= 25°C
1
10
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
7.9 Typical Characteristics
Figure 2. Output Switch Saturation Voltage vs
Figure 1. Output Switch On-Off Time vs Emitter Current (Emitter-Follower Configuration)
Oscillator Timing Capacitor
Figure 4. Standby Supply Current vs Supply Voltage
Figure 3. Output Switch Saturation Voltage vs
Collector Current (Common-Emitter Configuration)
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−
+
QS
1.25-V
Reference
Regulator
R
CT
Ipk
Oscillator
Q2
Q1
Switch
Collector
4
Switch
Emitter
Timing
Capacitor
GND
3
2
18
7
6
5
Comparator
Inverting Input
VCC
Ipk
Sense
Drive
Collector
100 W
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
8 Detailed Description
8.1 Overview
The MC33063A and MC34063A devices are easy-to-use ICs containing all the primary circuitry needed for
building simple DC-DC converters. These devices primarily consist of an internal temperature-compensated
reference, a comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current
output switch. Thus, the devices require minimal external components to build converters in the boost, buck, and
inverting topologies.
The MC33063A device is characterized for operation from –40°C to 85°C, while the MC34063A device is
characterized for operation from 0°C to 70°C.
8.2 Functional Block Diagram
8.3 Feature Description
• Wide Input Voltage Range: 3 V to 40 V
• High Output Switch Current: Up to 1.5 A
• Adjustable Output Voltage
• Oscillator Frequency Up to 100 kHz
• Precision Internal Reference: 2%
• Short-Circuit Current Limiting
• Low Standby Current
8.4 Device Functional Modes
8.4.1 Standard operation
Based on the application, the device can be configured in multiple different topologies. See the Application and
Implementation section for how to configure the device in several different operating modes.
Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: MC33063A MC34063A
8
7
6
1
2
R*
* R 0 for constant Vin
8
7
6
1
2
VOUT
RSC
VIN
RSC
VIN
VOUT
a) EXTERNAL npn SWITCH b) EXTERNAL npn SATURATED SWITCH (see Note A)
7
→
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
9.1.1 External Switch Configurations for Higher Peak Current
A. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (≤300 mA) and
high driver currents (≥30 mA), it may take up to 2 μs to come out of saturation. This condition will shorten the off time
at frequencies ≥30 kHz and is magnified at high temperatures. This condition does not occur with a Darlington
configuration because the output switch cannot saturate. If a non-Darlington configuration is used, the output drive
configuration in Figure 7b is recommended.
Figure 5. Boost Regulator Connections for ICPeak Greater Than 1.5 A
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Product Folder Links: MC33063A MC34063A
QS
R
CT
Ipk
Q2
Q1
2
1
Oscillator
_
+
1.25-V
Reference
Regulator
4
5
3
8
7
6
RSC
0.24 W
953 W
R1
CO
1N5819
1500 pF
R2
8.2 kW
100 mF
+
VCC
VOUT
−12 V/100 mA
1.0 mH
100 mF
Optional Filter
VIN
4.5 V to 6.0 V
+
+
1000 mF
+
L
88 mH
Comparator
VOUT = –1.25 (1+ R2
R1)
VIN
VOUT
VIN
VOUT
8
7
6
4
3
2
18
7
6
4
3
2
1
55
a) External NPN Switch b) External PNP Saturated Switch
VIN
8
7
6
1
2
8
7
6
1
2
RSC
VIN
RSC
VOUT
VOUT
a) EXTERNAL npn SWITCH b) EXTERNAL pnp SATURATED SWITCH
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
Application Information (continued)
Figure 6. Buck Regulator Connections for ICPeak Greater Than 1.5 A
Figure 7. Inverting Regulator Connections for ICPeak Greater Than 1.5 A
9.2 Typical Application
9.2.1 Voltage-Inverting Converter Application
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Typical Application (continued)
Figure 8. Voltage-Inverting Converter
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R2
1.25 1
R1
æ ö
- +
ç ÷
è ø
( )
out on
ripple pp
I t
9V
( )
( )
( ) ( )
sat
in min
on max
pk switch
V V
t
I
æ ö
-
ç ÷
ç ÷
ç ÷
è ø
( )
pk switch
0.3
I
( ) on
out max
off
t
2I 1
t
æ ö
+
ç ÷
è ø
5
on
4 10 t
-
´
( )
on off off
t t t+ -
on off
on
off
t t
t1
t
+
+
1
f
out F
in sat
V V
V V
+
-
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
Typical Application (continued)
9.2.1.1 Design Requirements
The user must determine the following desired parameters:
Vsat = Saturation voltage of the output switch
VF= Forward voltage drop of the chosen output rectifier
The following power-supply parameters are set by the user:
Vin = Nominal input voltage
Vout = Desired output voltage
Iout = Desired output current
fmin = Minimum desired output switching frequency at the selected values of Vin and Iout
Vripple = Desired peak-to-peak output ripple voltage. The ripple voltage directly affects the line and load
regulation and, thus, must be considered. In practice, the actual capacitor value should be larger than the
calculated value, to account for the capacitor's equivalent series resistance and board layout.
9.2.1.2 Detailed Design Procedure
CALCULATION VOLTAGE INVERTING
ton/toff
(ton + toff)
toff
ton
CT
Ipk(switch)
RSC
L(min)
CO
Vout See Figure 8
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200
220
240
260
280
300
320
340
360
380
−50 −25 0 25 50 75 100 125
TA, Ambient Temperature (°C)
VIPK, Current Limit
Sense Voltage (mV)
VCC = 5 V
ICHG = IDISCHG
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
9.2.1.3 Application Performance
Figure 9. Current-Limit Sense Voltage vs Temperature
TEST CONDITIONS RESULTS
Line regulation VIN = 4.5 V to 6 V, IO= 100 mA 3 mV ± 0.12%
Load regulation VIN = 5 V, IO= 10 mA to 100 mA 0.022 V ± 0.09%
Output ripple VIN = 5 V, IO= 100 mA 500 mVPP
Short-circuit current VIN = 5 V, RL= 0.1 Ω910 mA
Efficiency VIN = 5 V, IO= 100 mA 62.2%
Output ripple with optional filter VIN = 5 V, IO= 100 mA 70 mVPP
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QS
R
CT
Ipk
Q2
Q1
2
1
CT
Comparator
_
+
1.25-V
Reference
Regulator
4
5
3
8
180 W
7
6
RSC
0.22 W
47 kW
R2
L
170 mH
CO
1N5819
330 mF
1500 pF
R1
2.2 kW
100 mF
+
+
VCC
VOUT
28 V/175 mA
1.0 mH
100 mF+
Optional Filter
VIN
12 V
VOUT = 1.25 (1+ R2
R1)
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
9.2.2 Step-Up Converter Application
Figure 10. Step-Up Converter
9.2.2.1 Design Requirements
The user must determine the following desired parameters:
Vsat = Saturation voltage of the output switch
VF= Forward voltage drop of the chosen output rectifier
The following power-supply parameters are set by the user:
Vin = Nominal input voltage
Vout = Desired output voltage
Iout = Desired output current
fmin = Minimum desired output switching frequency at the selected values of Vin and Iout
Vripple = Desired peak-to-peak output ripple voltage. The ripple voltage directly affects the line and load
regulation and, thus, must be considered. In practice, the actual capacitor value should be larger than the
calculated value, to account for the capacitor's equivalent series resistance and board layout.
Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Links: MC33063A MC34063A
R2
1.25 1
R1
æ ö
+
ç ÷
è ø
( )
out on
ripple pp
I t
9V
( )
( )
( ) ( )
sat
in min
on max
pk switch
V V
t
I
æ ö
-
ç ÷
ç ÷
ç ÷
è ø
( )
pk switch
0.3
I
( ) on
out max
off
t
2I 1
t
æ ö
+
ç ÷
è ø
5
on
4 10 t
-
´
( )
on off off
t t t+ -
on off
on
off
t t
t1
t
+
+
1
f
( )
( )
out F Vin min
sat
in min
V V
V V
-
+
-
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
9.2.2.2 Detailed Design Procedure
CALCULATION STEP UP
ton/toff
(ton + toff)
toff
ton
CT
Ipk(switch)
RSC
L(min)
CO
Vout See Figure 10
9.2.2.3 Application Performance
TEST CONDITIONS RESULTS
Line regulation VIN = 8 V to 16 V, IO= 175 mA 30 mV ± 0.05%
Load regulation VIN = 12 V, IO= 75 mA to 175 mA 10 mV ± 0.017%
Output ripple VIN = 12 V, IO= 175 mA 400 mVPP
Efficiency VIN = 12 V, IO= 175 mA 87.7%
Output ripple with optional filter VIN = 12 V, IO= 175 mA 40 mVPP
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Product Folder Links: MC33063A MC34063A
QS
R
CT
Ipk
Q2
Q1
2
1
CT
Oscillator
_
+
1.25-V
Reference
Regulator
4
5
3
8
7
6
RSC
0.33 W
3.8 kW
R2
L
220 mH
CO
1N5819
470 mF
470 pF
R1
1.2 kW
100 mF
+
+
VCC
VOUT
5 V/500 mA
1.0 mH
100 mF+
Optional Filter
VIN
25 V
Comparator
VOUT = 1.25 (1+ R2
R1)
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
9.2.3 Step-Down Converter Application
Figure 11. Step-Down Converter
9.2.3.1 Design Requirements
The user must determine the following desired parameters:
Vsat = Saturation voltage of the output switch
VF= Forward voltage drop of the chosen output rectifier
The following power-supply parameters are set by the user:
Vin = Nominal input voltage
Vout = Desired output voltage
Iout = Desired output current
fmin = Minimum desired output switching frequency at the selected values of Vin and Iout
Vripple = Desired peak-to-peak output ripple voltage. The ripple voltage directly affects the line and load
regulation and, thus, must be considered. In practice, the actual capacitor value should be larger than the
calculated value, to account for the capacitor's equivalent series resistance and board layout.
Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 15
Product Folder Links: MC33063A MC34063A
R2
1.25 1
R1
æ ö
+
ç ÷
è ø
( ) ( )
( )
pk on off
switch
ripple pp
I t t
8V
+
( )
( )
( ) ( )
sat out
in min
on max
pk switch
V V V
t
I
æ ö
- -
ç ÷
ç ÷
ç ÷
è ø
( )
pk switch
0.3
I
( )
out max
2I
5
on
4 10 t
-
´
( )
on off off
t t t+ -
on off
on
off
t t
t1
t
+
+
1
f
( )
out F
sat out
in min
V V
V V V
+
- -
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
9.2.3.2 Detailed Design Procedure
CALCULATION STEP DOWN
ton/toff
(ton + toff)
toff
ton
CT
Ipk(switch)
RSC
L(min)
CO
Vout See Figure 11
9.2.3.3 Application Performance
TEST CONDITIONS RESULTS
Line regulation VIN = 15 V to 25 V, IO= 500 mA 12 mV ± 0.12%
Load regulation VIN = 25 V, IO= 50 mA to 500 mA 3 mV ± 0.03%
Output ripple VIN = 25 V, IO= 500 mA 120 mVPP
Short-circuit current VIN = 25 V, RL= 0.1 Ω1.1 A
Efficiency VIN = 25 V, IO= 500 mA 83.7%
Output ripple with optional filter VIN = 25 V, IO= 500 mA 40 mVPP
16 Submit Documentation Feedback Copyright © 2004–2015, Texas Instruments Incorporated
Product Folder Links: MC33063A MC34063A
MC33063A
1
2
3
4
8
7
6
5
0.33
R1
VIN
100 PF
CT
COR2
VOUT
MC33063A
,
MC34063A
www.ti.com
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
10 Power Supply Recommendations
This device accepts 3 V to 40 V on the input. It is recommended to have a 1000-µF decoupling capacitor on the
input.
11 Layout
11.1 Layout Guidelines
Keep feedback loop layout trace lengths to a minimum to avoid unnecessary IR drop. In addition, the loop for the
decoupling capacitor at the input should be as small as possible. The trace from VIN to pin 1 of the device should
be thicker to handle the higher current.
11.2 Layout Example
Figure 12. Layout Example for a Step-Down Converter
Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Links: MC33063A MC34063A
MC33063A
,
MC34063A
SLLS636N –DECEMBER 2004–REVISED JANUARY 2015
www.ti.com
12 Device and Documentation Support
12.1 Related Links
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to sample or buy.
Table 1. Related Links
TECHNICAL TOOLS & SUPPORT &
PARTS PRODUCT FOLDER SAMPLE & BUY DOCUMENTS SOFTWARE COMMUNITY
MC33063A Click here Click here Click here Click here Click here
MC34063A Click here Click here Click here Click here Click here
12.2 Trademarks
All trademarks are the property of their respective owners.
12.3 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
12.4 Glossary
SLYZ022 —TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
18 Submit Documentation Feedback Copyright © 2004–2015, Texas Instruments Incorporated
Product Folder Links: MC33063A MC34063A
PACKAGE OPTION ADDENDUM
www.ti.com 24-Aug-2018
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
MC33063AD ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 M33063A
MC33063ADE4 ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 M33063A
MC33063ADG4 ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 M33063A
MC33063ADR ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 M33063A
MC33063ADRE4 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 M33063A
MC33063ADRG4 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 M33063A
MC33063ADRJR ACTIVE SON DRJ 8 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 ZYF
MC33063AP ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type -40 to 85 MC33063AP
MC33063APE4 ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type -40 to 85 MC33063AP
MC34063AD ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 M34063A
MC34063ADE4 ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 M34063A
MC34063ADG4 ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 M34063A
MC34063ADR ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 M34063A
MC34063ADRJR ACTIVE SON DRJ 8 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR 0 to 70 ZYF
MC34063ADRJRG4 ACTIVE SON DRJ 8 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR 0 to 70 ZYF
MC34063AP ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type 0 to 70 MC34063AP
MC34063APE4 ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type 0 to 70 MC34063AP
PACKAGE OPTION ADDENDUM
www.ti.com 24-Aug-2018
Addendum-Page 2
(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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF MC33063A :
•Automotive: MC33063A-Q1
NOTE: Qualified Version Definitions:
•Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
MC33063ADR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
MC33063ADR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
MC33063ADRJR SON DRJ 8 1000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2
MC34063ADR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
MC34063ADRJR SON DRJ 8 1000 180.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2
PACKAGE MATERIALS INFORMATION
www.ti.com 17-Oct-2015
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
MC33063ADR SOIC D 8 2500 367.0 367.0 35.0
MC33063ADR SOIC D 8 2500 340.5 338.1 20.6
MC33063ADRJR SON DRJ 8 1000 367.0 367.0 35.0
MC34063ADR SOIC D 8 2500 340.5 338.1 20.6
MC34063ADRJR SON DRJ 8 1000 210.0 185.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 17-Oct-2015
Pack Materials-Page 2
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