www.recom-power.com REV.: 7/2020 I-1
DC/DC Converter
IEC/EN60950-1 certified
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REACH
REACH
compliant
compliant
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RoHS
RoHS
2
2
+
+
compliant
compliant
10 from 10
10 from 10
2,3,4 Amp
SIP12
Vertical &
Horizontal
Single Output
Y
E
A
R
w
a
r
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a
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3
Description
The R-7xxx series is a high performance 2.5V to 17V, 2Amp to 4Amp, 12-Pin SIP (single in-line
package), integrated switching regulator (ISR). The synchronous - rectified design yields excellent
efficiencies up to 97%. Short circuit protection reduces the short circuit input current to under 50mA.
R-7xxxP_D
Features
Switching
Regulator
• Non-isolated
• Synchronous rectification design
• Adjustable output voltage
• 2, 3, 4Amp adjustable positive step down
Integrated switching regulator
• Over load protection
• Continuous short circuit protection
• Efficiency up to 97%
Selection Guide
Part Input Output Vout Output Efficiency Max. Capacitive
Number Voltage Range Voltage Adjust Range (1) Current @ min Vin @ max. Vin Load (2)
[VDC] [VDC] [VDC] [A] [%] [%] [µF]
R-723.3x 4.5 - 28 3.3 2.5 - 5.5 2 95 89 200/6800
R-725.0x 6.5 - 28 5.0 3.0 - 5.5 2 96 91 200/6800
R-726.5x 8.5 - 28 6.5 5.0 - 8.0 2 97 93 200/6800
R-729.0x 12 - 28 9.0 7.0 - 11 2 96 93 200/6800
R-7212x 15 - 28 12 10 - 14 2 97 95 200/6800
R-7215x 19 - 28 15 13 - 17 2 97 96 200/6800
R-733.3x 4.5 - 28 3.3 2.5 - 5.5 3 94 89 200/6800
R-735.0x 6.5 - 28 5.0 3.0 - 5.5 3 95 92 200/6800
R-736.5x 8.5 - 28 6.5 5.0 - 8.0 3 97 93 200/6800
R-739.0x 12 - 28 9.0 7.0 - 11 3 96 94 200/6800
R-7312x 15 - 28 12 10 - 14 3 97 96 200/6800
R-7315x 19 - 28 15 13 - 17 3 97 96 200/6800
R-743.3x 4.5 - 28 3.3 2.5 - 5.5 4 93 88 200/6800
R-745.0x 6.5 - 28 5.0 3.0 - 5.5 4 95 91 200/6800
R-746.5x 8.5 - 28 6.5 5.0 - 7.5 4 96 93 200/6800
Notes:
Note1: Vin-Vout ≥ 1.5V~4.0V depending on Vout if adjust function is used
Note2: Please refer to basic characteristics on page I-2
Notes:
Note3: x can be „P“ = vertical through hole
x can be „D“ = bent pins for horizontal through hole mounting
Model Numbering
Ordering Examples:
R-723.3P Iout= 2A nom. Vout= 3.3VDC P= vertical through hole
R-7312D Iout= 3A nom. Vout= 12VDC D= horizontal through hole
Pinning (3)
Output Current (A)
nom. Output Voltage
R-7_ __ x
www.recom-power.com REV.: 7/2020 I-2
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
R-7xxxP_D
Series
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Quiescent Current min. Vin to max. 30mA
Internal Power Dissipation ta<60°C 1.4W
Output Current Limit
R-72xxx
R-73xxx
R-74xxx
2.5A
3.75A
5.0A
3.0A
4.25A
5.5A
Minimum Load 10%
ON/OFF CTRL (4) DC-DC ON
DC-DC OFF
Open or high, 4.5V min. / 28V max.
Low (Power OFF) 0.8V max.
Input Current of CTRL Pin DC-DC OFF 100µA
Internal Operating Frequency 270kHz 300kHz 330kHz
Output Ripple and Noise 40mVp-p 70mVp-p
Maximum Capacitive Load normal start-up time, no external diodes 200µF
<1 second start-up time + diode protection circuit 6800µF
continued on next page
How to calculate the max. output current
Calculation 1: Calculation 2:
Calculation 3:
Notes:
Note4: ON/OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET
0 0.5
0
20
40
60
80
85
100
Ambient Temperature [°C]
Internal Power Dissipation [W]
1.4
1
Vin = 28V
Vout = 5V
Effmax Vin = 91%
PD = 1.4W
TAmbient = 60°C
Vin = 28V
Vout = 5V
Effmax Vin = 91%
PD = 1.0W
TAmbient = 85°C
Vin = 12V
Effmax Vin = 94%
PD = 1.0W
TAmbient = 85°C
Example: R-745.0P
Iout= 1.4W = 3.11A
5V x (1-0.91 )Iout= 1W = 2.222A
5V x (1-0.91 )
Iout= 1W = 3.33A
5V x (1-0.94 )
Iout= PD
Vout x (1-Effmax Vin )
PD= Iout x Vout x (1-Effmax Vin )
The internal power dissipation (PD ) follows the equation:
www.recom-power.com REV.: 7/2020 I-3
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
R-7xxxP_D
Series
Efficiency vs. Load
Ripple vs. Input Voltage
R-72xx / R-73xx
R-72xx / R-73xx
R-72xx / R-73xx / R-74xx
max. Vin
R-72xx / R-73xx / R-74xx
min. Vin
R-74xx
R-74xx
Efficiency vs. Input Voltage
100
40
60
50
80
70
90
Efficiency [%]
Output Current [A]
15Vout
5Vout
3.3Vout
10 32 4
100
70
80
75
90
85
95
Efficiency [%]
Output Current [A]
0 1 2 3 4
6.5Vout
5Vout
3.3Vout
Ripple (mV)
Input Voltage [VDC]
0 5 10 15 20 25 28
6.5Vout
5Vout
3.3Vout
50
100
80
70
90
60
40
30
10
0
20
25
50
40
30
35
45
20
15
5
0
10
Ripple (mV)
Input Voltage [VDC]
0 5 10 15 20 25 28
15Vout
12Vout
9Vout
6.5Vout
5Vout
3.3Vout
100
90
80
70
60
50
40
30
20
10
0
Efficiency [%]
Input Voltage [VDC]
0 5 10 15 20 25 28
6.5Vout
5Vout
3.3Vout
100
90
80
70
60
50
40
30
20
10
0
Efficiency [%]
Input Voltage [VDC]
0 5 10 15 20 25 28
15Vout
6.5Vout
5Vout
3.3Vout
www.recom-power.com REV.: 7/2020 I-4
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
R-7xxxP_D
Series
REGULATIONS
Parameter Condition Value
Output Accuracy full load ±1.0% typ. / ±2.0% max.
Line Regulation low line to high line, full load ± 0.5% typ. / ±1.0% max.
Load Regulation (5) 10% to 100%, full load ± 0.5% typ. / ±1.0% max.
Transient Response (6) 50% load step change
Vout Over / Undershoot
100µs typ. / 200µs max.
100mV max.
2ADC R-723.3P/D R-725.0P/D R-726.5P/D R-729.0P/D R-7212P/D R-7215P/D
3ADC R-733.3P/D R-735.0P/D R-736.5P/D R-739.0P/D R-7312P/D R-7315P/D
4ADC R-743.3P/D R-745.0P/D R-746.5P/D
Vout nom. 3.3VDC 5.0VDC 6.5VDC 9.0VDC 12VDC 15VDC
Vout adj. Rdown Rup Rdown Rup Rdown Rup Rdown Rup Rdown Rup Rdown Rup
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 4.5kΩ13kΩ
7.5 2.2kΩ
8.0 31kΩ
9.0
10 2.2kΩ20kΩ
11 390Ω47kΩ
12
13 2.4kΩ36kΩ
14 390Ω76kΩ
15
16 2.6kΩ
17 860Ω
Trim Table
Notes:
Note5: Operation below 10% load will not harm the converter, but specifications may not be met
Note6: Requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications
(the capacitor has to be placed as close as possible to the output pins)
www.recom-power.com REV.: 7/2020 I-5
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
R-7xxxP_D
Series
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range without derating @ natural convection 0.1m/s -40°C to +85°C
Maximum Case Temperature +110°C
Thermal Impedance @ natural convection 0.1m/s 25°C/W
Operating Humidity non-condensing 95% RH max.
Operating Altitude 2000m
Pollution Degree PD2
MTBF according to MIL-HDBK 217F, G.B. +25°C
+85°C
749 x 103 hours
150 x 103 hours
PROTECTIONS
Parameter Condition Value
Short Circuit Protection (SCP) continuous, automatic recovery
Short Circuit Input Current 50mA typ. / 100mA max.
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Information Technology Equipment, General Requirements for Safety
1605077-12 IEC60950-1:2005, 2nd Edition + AM2:2013
EN60950-1:2006 + AM2:2013
EAC
RU-AT.49.09571 TP TC 004/2011
RoHS 2+ RoHS-2011/65/EU + AM-2015/863
continued on next page
Optional Diode Protection Circuit
Add a blocking diode to Vout if current
can flow backwards into the output, as
this can damage the converter when it
is powered down. Protection diodes are
required for high capacitive loads.
The diode can either be fitted across
the device, if the source is low imped-
ance or fitted in series with the output
(recommended). Rdown: Trim output voltage up to 1 diode drop
R-5/6/7xxx
+Vin +Vout
D1
GND GND
+Vin +Vout
GND
R-5/6/7xxx
D1
Rdown
+Vin +Vout
GND GND
+Vin +Vout
GND Vadj
Optional Protection 1: Optional Protection :
www.recom-power.com REV.: 7/2020 I-6
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
R-7xxxP_D
Series
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Material case
potting
non-conducive black plastic, (UL94 V-0)
epoxy, (UL94 V-0)
Dimension (LxWxH) 32.2 x 9.1 x 15.0mm
Weight 9g typ.
Dimension Drawing (mm)
R-7xxxD
R-7xxxP
Pin Connections
Pin # Single 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 Vadj with external resistors R1, R2 to selected output voltage
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
Bottom View Top View
1 2 3 4 5 6 7 8 9 10 11 12
1 2 3 4 5 6 7 8 9 10 11 12
2.54
2.54
32.2
15.0
9.117.0
2.1
11 x 2.54 = 27.94
0.70+0.10/-0.05 0.25±0.05
Bottom View
Top View
1 2 3 4 5 6 7 8 9 10 11 12
1 2 3 4 5 6 7 8 9 10 11 12
2.54
2.54
9.1
32.2
11 x 2.54 = 27.94
0.8
0.70+0.10/-0.05 0.25±0.05
15.04.10
Marking
embossed logo
2.1
Recommended Footprint Details
Recommended Footprint Details
EMC Filtering Suggestions according to EN55032
C1 C2
GND GND
C4
L2
L1 R-746.5
C3
GND
+V
out
+V
in
+V
out
+V
in
Component List
EN55022 C1 C2 C3 C4 L1 L2
Class A N/A 33µF N/A N/A 0.45mH CMC
Class B 10µF 33µF 1nF/2kV 2mH 0.45mH CMC
www.recom-power.com REV.: 7/2020 I-7
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
R-7xxxP_D
Series
INSTALLATION AND APPLICATION
C1
C2
Q1
1µF
(Optional)
100µF
ESR= 150mΩ max.
(Required)
+Vin +Vout
Vadj
GND
ON/OFF
+Vin
Com Com
+Vout
Rdown
Rup
R-7xxxP_D
OFF
ON
VCTRL
Standard Application Circuit
Add blocking diode to Vout if current can flow backwards into the output, as this can damage the converter.
(Please refer to “Optional Diode Protection Circuit” on Page I-5)
PACKAGING INFORMATION
Parameter Type Value
Packaging Dimensions (LxWxH) R-7xxxD
R-7xxxP
520.0 x 20.0 x 19.0mm
530.0 x 23.0 x 19.0mm
Packaging Quantity tube 15pcs
Storage Temperature Range -40°C to +125°C
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause
loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized
use of RECOM products in such safety-critical applications.
