Document
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%
DC/DC Converter
R-7xxxP_D
RE CTS
RE CTS
y
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.
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
w
ERS CO
ERS CO
2,3,4 Amp SIP12
YEAR
3
arrant
Vertical &
Horizontal
Single Output
COM CONVERT
RoHS 2+
compliant 10 from 10
M PLIANT PRODU
COM CONVERT
REACH
compliant
M PLIANT PRODU
IEC/EN60950-1 certified
Model Numbering
R-7_ __ x
Output Current (A) nom. Output Voltage
Pinning (3)
Notes:
Note3: x can be „P“ = vertical through hole
x can be „D“ = bent pins for horizontal through hole mounting
Ordering Examples: R-723.3P Iout= 2A R-7312D Iout= 3A
nom. Vout= 3.3VDC P= vertical through hole nom. Vout= 12VDC D= horizontal through hole
www.recom-power.com
REV.: 7/2020
I-1
R-7xxxP_D
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
Series
BASIC CHARACTERISTICS Parameter
Quiescent Current Internal Power Dissipation
Output Current Limit
Minimum Load ON/OFF CTRL (4) Input Current of CTRL Pin Internal Operating Frequency Output Ripple and Noise
Maximum Capacitive Load
Condition min. Vin to max.
ta<60°C R-72xxx R-73xxx R-74xxx
DC-DC ON DC-DC OFF DC-DC OFF
Min. 10% 270kHz
normal start-up time, no external diodes <1 second start-up time + diode protection circuit
Typ.
2.5A 3.75A 5.0A
Max. 30mA 1.4W 3.0A 4.25A 5.5A
Open or high, 4.5V min. / 28V max. Low (Power OFF) 0.8V max.
100µA
300kHz
330kHz
40mVp-p
70mVp-p
200µF
6800µF
Notes: Note4: ON/OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET
Ambient Temperature [°C]
How to calculate the max. output current
100
The internal power dissipation (P ) follows the equation:
85
D
80
PD= Iout x Vout x (1-Effmax Vin )
60
Iout=
PD Vout x (1-Eff )
max Vin
Example: R-745.0P
Calculation 1: Vin = 28V Vout = 5V Eff = 91%
max Vin
PD = 1.4W TAmbient = 60°C
1.4W
Iout=
= 3.11A
5V x (1-0.91 )
Calculation 3: Vin = 12V
Eff = 94% max Vin
PD = 1.0W TAmbient = 85°C
40
20
0
0
0.5
1
1.4
Internal Power Dissipation [W]
Calculation 2: Vin = 28V Vout = 5V Eff = 91%
max Vin
PD = 1.0W TAmbient = 85°C
1W
Iout=
= 2.222A
5V x (1-0.91 )
1W
Iout=
= 3.33A
5V x (1-0.94 )
continued on next page
www.recom-power.com
REV.: 7/2020
I-2
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
Efficiency vs. Load R-72xx / R-73xx / R-74xx max. Vin
100
90
Efficiency [%]
80
70
60
50
15Vout 5Vout
3.3Vout
40
0
1
2
3
4
Output Current [A]
Efficiency vs. Input Voltage
Efficiency [%]
R-72xx / R-73xx
100
90
80
70
60
50
40
30
15Vout
20
6.5Vout
10
5Vout 3.3Vout
0
0
5
10
15
20
25 28
Input Voltage [VDC]
Efficiency [%]
Efficiency [%]
R-7xxxP_D
Series
100 95 90 85 80 75 70
0
R-72xx / R-73xx / R-74xx min. Vin
6.5Vout 5Vout 3.3Vout
1
2
3
4
Output Current [A]
100 90 80 70 60 50 40 30 20 10 0
0
R-74xx
6.5Vout 5Vout 3.3Vout
5
10
15
20
25
28
Input Voltage [VDC]
Ripple vs. Input Voltage
R-72xx / R-73xx
50
45 40
Ripple (mV)
35 30
25
20
15
10
15Vout
6.5Vout
12Vout
5Vout
5
9Vout
3.3Vout
0
0
5
10 15 20 25 28
Input Voltage [VDC]
www.recom-power.com
REV.: 7/2020
Ripple (mV)
R-74xx
100
90 80
70 60
50
40
30
20
6.5Vout
5Vout
10
3.3Vout
0
0
5
10 15 20 25 28
Input Voltage [VDC]
I-.