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24-August-2005
2, 3, 4 AMP
SIP12
Vertical &&
Horizontal
INNOLINE
DC/DC-Converter
R-7xxxP_D
Series
●Non-Isolated
●Synchronous rectification design
●Adjustable Output voltage
●2, 3, 4AMP Adjustable Positive Step Down
Integrated Switching Regulator
●Over load protection (125% full load typical)
●Remote ON/OFF Control(Ground Off)
●Wide Input Range
●Continuous short circuit protection
(Very low short current Iin<50mA)
●Input voltage range 4.5V~28V
●Efficiency to 97%
Features
Selection Guide
Part Input Nominal Vout Output Efficiency (%)
Number Range Output Voltage Adjust Range Current Min. Vin 12V Max. Vin
SIP12 (V) (V) (V) (A)
R-723.3x 4.5 – 28 3.3 2.5 – 5.5 2 95 93 89
R-725.0x 6.5 – 28 5.0 3.0 – 6.0 2 96 95 91
R-726.5x 8.5 – 28 6.5 5.0 – 8.0 2 97 96 93
R-729.0x 12 – 28 9.0 7.0 – 11 2 96 - 93
R-7212x 15 – 28 12 10 – 14 2 97 - 95
R-7215x 19 – 28 15 13 – 17 2 97 - 96
R-733.3x 4.5 – 28 3.3 2.5 – 5.5 3 94 93 89
R-735.0x 6.5 – 28 5.0 3.0 – 6.0 3 95 95 92
R-736.5x 8.5 – 28 6.5 5.0 – 8.0 3 97 96 93
R-739.0x 12 – 28 9.0 7.0 – 11 3 96 - 94
R-7312x 15 – 28 12 10 – 14 3 97 - 96
R-7315x 19 – 28 15 13 – 17 3 97 - 96
R-743.3x 4.5 – 28 3.3 2.5 – 5.5 4 93 92 88
R-745.0x 6.5 – 28 5.0 3.0 – 6.0 4 95 94 91
R-746.5x 8.5 – 28 6.5 5.0 – 7.5 4 96 96 93
Note: Vin-Vout ≥1.5V~4.0V depending on Vout if adjust function is used!
Suffix x: (see mechanical drawing for details)
x = P pins vertical through hole
x = D pins bent for horizontal through hole mounting
The R-7XXX series is a high performance 2.5V to 15V , 2Amp to 4Amp,12-Pin SIP (single in-line
package).Integrated switching regulator (ISR), Synchronuous - rectified design yields excellent efficien-
cies up to 97%. Short circuit protection with crowbar function to reduce the short circuit current to
under 50mA of input current.
Description
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24-August-2005
Characteristics Conditions Min. Typ. Max.
Output Voltage Range All Series 2.5 17V
Output Current R-72xxP/D 0.2 2.0A
R-73xxP/D 0.3 3.0A
R-74xxP/D 0.4 4.0A
Output Current Limit R-72xxP/D 2.5 3.0A
R-73xxP/D 3.75 4.25A
R-74xxP/D 5.0 5.5A
Short Circuit Input Current All Series 50 100mA
Output Voltage Accuracy (At 100% Load) All Series ±1% ±2%
Line Voltage Regulation (Vin = min. to max. at full load) All Series 0.5 1.0%
Load Regulation (10 to 100% full load) All Series 0.5 1.0%
Ripple & Noise All Series 40mVp-p 70mVp-p
Transient Response (see note 1) 50% Load Change – 100µS 200µs
Vout Over / Undershoot 100mV
Remote ON / OFF (see note 2) Open or High (Power ON) 4.5 28V
Low (Power OFF) 0.8V
Switching Frequency 270 300 330kHz
Shutdown current ON / OFF Pin pulled low 100µA
Quiescent Current Vin = min. to max. at 0% load 30mA
Operating Temperature Range -40°C +85°C
Operating Case Temperature +110°C
Storage Temperature Range -40°C +125°C
Thermal Impedance Natural Convection 25°C/W
Internal Power Dissipation Ta < 60°C 1.4W
MTBF (Nominal Vout, 100% load) Tamb. = +25°C 749kHrs
Tamb. = +85°C 150kHrs
R-7xxxP_D
Series
Specifications (refer to the standard application circuit, Ta: 25°C)
INNOLINE
DC/DC-Converter
Standard Application Circuit
Vout
Com
Vin
TTL
Com
2, 3, 4 9, 10, 11
R-72XX
R-73XX
R-74XX R1
(Adjust down)
R2
(Adjust up)
12
5, 6, 7,8
1µF
(Optional) 1
C1
OFF
ON
Q1
C2
100µF/10V
(REQ`D)
Notes:
1. Requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications (the capacitor to be placed as close as possible to the output pins).
2. ON / OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET.
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24-August-2005
R-7xxxP_D
Series
Output Current vs Input Voltage
INNOLINE
DC/DC-Converter
Ambient Temperature (°C)
90
60
20
40
1.4
10.5
Internal Power Dissipation (W)
0
80
85
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The internal power dissipation(PD)follows the equation:
PD= Io × Vo × (1-η)
Io = PD/ Vo × (1-η)
Where PD= Internal power dissipation
Io = Output current
Vo = Output voltage
η= Efficiency
Example: R-745.0P , at Vin = 28Vdc , Vo = 5Vdc ,η=91% (see table 1)
(a) When Ta = 60°C , PD= 1.4 Watt (see fig-1)
Io = 1.4(W) / 5(V) × (1-0.91) = 3.11(A)
(b) When Ta = 85°C , PD= 1 Watt (see fig-1)
Io = 1(W) / 5(V) × (1-0.91) = 2.222(A)
(c) At Vin = 12Vdc efficiency = 94% (see table 1)
When Ta = 85°C , PD= 1 Watt (see fig-1)
Io = 1(W) / 5(V) × (1-0.94) =3.33(A)
Characteristics
Ripple (mV)
50
5
Ripple Vs
Vin
Vo=9V
Vo=3.3V
Vo=5V
Vo=12V
25
Vin ( V )
10 15 20 25 28
Vo=6.5V
Vo=15V
( Vo )
Ripple (mV)
100
5
Ripple Vs
Vin
3.3V
5V
50
Vin ( V )
10 15 20 25 28
6.5V
( Vo )
R-72xx / R-73xx
Ripple VS Vin
R-74xx
Ripple VS Vin
Efficiency (%)
100
5
Efficiency Vs
Vin
3.3V
5V
50
Vin ( V )
10 15 20 25 28
6.5V
15V
( Vo )
Efficiency (%)
100
5
Efficiency Vs
Vin
Vo=3.3V
Vo=5V
50
Vin ( V )
10 15 20 25 28
Vo=6.5V
( Vo )
R-72xx / R-73xx
Efficiency VS Vin
R-74xx
Efficiency VS Vin
Efficiency (%)
100
14
23
90
Efficiency Vs Iout (Vin=Min)
80
70
6.5V
3.3V
5.0V
( Vo )
Efficiency (%)
100
14
23
90
Efficiency Vs Iout (Vin=Max)
80
60
15V
3.3V
5.0V
( Vo )
R-72xx / R-73xx / R-74xx
Efficiency / Load Vin=Min
R-72xx / R-73xx / R-74xx
Efficiency / Load Vin=Max
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24-August-2005
R-7xxxP_D
Series
Package Style and Pinning (mm)
INNOLINE
DC/DC-Converter
Pin Connections
Pin # Name Description
1 ON / OFF Input pin : Active low (less than 0.8V) to disable the device
2, 3, 4 Vin Power input
5, 6, 7, 8 GND Input and output ground (common)
9 , 10, 11 Vout Power output
12 Vout-Adj With external resistors R1,R2 to selected output voltage
Tolerance: ± 0.25 mm
3rd angle
projection
SIP12 PIN Package
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24-August-2005
R-7xxxP_D
Series
Table 1: Adjustment Resistor Values
2A DC R-723.3P/D R-725.0P/D R-726.5P/D R-729.0P/D R-7212P/D R-7215P/D
3A DC R-733.3P/D R-735.0P/D R-736.5P/D R-739.0P/D R-7312P/D R-7315P/D
4A DC R-743.3P/D R-745.0P/D R-746.5P/D - - -
Vout (nominal) 3.3VDC 5.0VDC 6.5VDC 9.0VDC 12VDC 15VDC
Vout (adj) R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2
2.5 8.5KΩ
3.0 33KΩ470Ω
3.2 110KΩ1.6KΩ
3.3 2.2KΩ
3.4 36KΩ3.0KΩ
3.6 11KΩ4.7KΩ
3.9 4.7KΩ8.5KΩ
4.5 1.6KΩ30KΩ
4.9 820Ω220KΩ
5.0 680Ω11KΩ
5.1 560Ω28KΩ12KΩ
5.5 190Ω2.6KΩ20KΩ
6.0 47KΩ
6.5
7.0 560Ω13KΩ
8.0 330Ω31KΩ
9.0
10 2.2KΩ20KΩ
11 390Ω47KΩ
12
13 2.4KΩ36KΩ
14 390Ω76KΩ
15
16 2.6KΩ
17 860Ω
18
INNOLINE
DC/DC-Converter