Document
Features
Switching Regulator
• Non-isolated • Synchronous rectification design • Adjustable output voltage • 2, 3, 4 & 5AMP adjustable positive step down
integrated switching regulator • Over load protection • Continuous short circuit protection • Efficiency up to 96%
DC/DC Converter
R-5xxxPA_DA
Description
The R-5xxxA series is a high performance 1.2V to 5.5V, 2Amp to 5Amp, 12-Pin SIP (single in-line package) integrated switching regulator (ISR). The synchronous - rectified design yields excellent efficiencies up to 96%. Short circuit protection reduces the short circuit input current to under 50mA. Autosense function compensates for any losses in long circuit loops.
Selection Guide
Part
Input
Number Voltage Range
[VDC]
R-521.2xA 4.5 - 18
R-521.8xA 4.5 - 18
R-522.5xA 4.5 - 18
R-523.3xA 4.5 - 18
R-525.0xA 6.5 - 18
R-531.2xA 4.5 - 18
R-531.8xA 4.5 - 18
R-532.5xA 4.5 - 18
R-533.3xA 4.5 - 18
R-535.0xA 6.5 - 18
R-541.2xA 4.5 - 18
R-541.8xA 4.5 - 18
R-542.5xA 4.5 - 18
R-543.3xA 4.5 - 18
R-545.0xA 6.5 - 18
R-551.2xA 4.4 - 18
R-551.8xA 4.5 - 18
R-552.5xA 4.5 - 18
R-553.3xA 4.5 - 18
R-555.0xA 7.0 - 1.8
Output Voltage [VDC]
1.2 1.8 2.5 3.3 5.0 1.2 1.8 2.5 3.3 5.0 1.2 1.8 2.5 3.3 5.0 1.2 1.8 2.5 3.3 5.0
Vout Adjust Range (1)
[VDC] 1.0 - 3.0 1.1 - 4.5 1.6 - 5.5 1.6 - 5.5 3.0 - 5.5 1.0 - 3.0 1.1 - 4.5 1.6 - 5.5 1.6 - 5.5 3.0 - 5.5 1.0 - 3.0 1.1 - 4.5 1.6 - 5.5 1.6 - 5.5 3.0 - 5.5 1.0 - 3.0 1.1 - 4.5 1.6 - 5.5 1.6 - 5.5 3.0 - 5.5
Output Efficiency Max. Capacitive
Current @ min Vin @ max. Vin Load (2)
[A]
[%] 12V [%]
[µF]
2
83 79 75
300/6800
2
88 85 82
300/6800
2
91 88 86
300/6800
2
92 90 89
300/6800
2
95 93 92
300/6800
3
85 84 82
300/6800
3
89 88 86
300/6800
3
92 91 89
300/6800
3
94 93 92
300/6800
3
96 95 94
300/6800
4
82 81 79
300/6800
4
87 86 85
300/6800
4
91 89 88
300/6800
4
93 92 91
300/6800
4
95 94 93
300/6800
5
81 80 78
300/6800
5
86 85 84
300/6800
5
90 89 88
300/6800
5
92 91 90
300/6800
5
94 93 92
300/6800
2,3,4,5 Amp SIP12 Vertical & Horizontal Single Output
IEC/EN60950-1 certified
Notes: Note1: Vin-Vout ≥ 1.5V~4.0V depending on Vout if adjust function is used Note2: please refer to basic characteristics
Model Numbering
R-5_ __ xA
Output Current (A) nom. Output Voltage
Pinning (3)
Notes:
Note3: x can be „P“= vertical through hole
x can be „D“ = bent for horizontal through hole mounting
Ordering Examples: R-553.3PA Iout= 5A R-522.5DA Iout= 2A
nom. Vout= 3.3VDC P= vertical through hole nom. Vout= 2.5VDC D= bent for horizontal through hole mounting
www.recom-power.com
REV.: 5/2019
I-1
R-5xxxPA_DA
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-52xx R-53xx R-54xx R-55xx
DC-DC ON DC-DC OFF DC-DC OFF
R-52xx R-53xx & R-54xx & R-55xx normal start-up time, no external diodes <1 second start-up time + diode protection circuit
Min.
10% 270kHz
Typ.
2.5A 3.75A 5.0A 6.0A
Max. 20mA
1.4W
3.0A 4.25A 5.5A 6.5A
Open or high, 4.5V min. / 18V max. Low (Power OFF) 0.8V max.
100µA
300kHz
330kHz
40mVp-p 80mVp-p
70mVp-p 120mVp-p
300µF
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 (PD ) follows the equation:
85
80
PD= Iout x Vout x (1-Effmax Vin )
60
Iout=
PD
Vout x (1-Effmax Vin )
40
20
Example: R-545.0P
Calculation 1: Vin = 18V Vout = 5V Effmax Vin = 93% PD = 1.4W TAmbient = 60°C
1.4W Iout=
5V x (1-0.93 )
= 4.0A
0
0
0.5
1
1.4
Internal Power Dissipation [W]
Calculation 2: Vin = 18V
Vout = 5V
Effmax Vin = 93% PD = 1W TAmbient = 85°C
1W
Iout=
= 2.857A
5V x (1-0.93 )
Calculation 3: Vin = 12V
Effmax Vin = 94% P = 1.0W
D
TAmbient = 85°C
1W
Iout=
= 3.33A
5V x (1-0.94 )
continued on next page
www.recom-power.com
REV.: 5/2019
I-2
DC/DC Converter
Specifications (refer to standard application circuit, Ta= 25°C)
Efficiency vs. Load
100
R-53xx / R-54xx / R-55xx min. Vin
95
Efficiency [%]
90 85
80
5Vout
3.3Vout
75
2.5Vout
1.8Vout
1.2Vout
70
0.1 1
2
3
4
5
Output Load [A]
Efficiency [%]
R-5xxxPA_DA
Series
R-52xx min. Vin
100
95
90 85
80
5Vout
3.3Vout
75
2.5Vout
1.8Vout
1.2Vout
70
0.1 0.5
1
1.5
2
Output Load [A]
R-53xx / R-54xx / R-55xx Vin=18V
100
95
R-52xx Vin=18V
100
90
Efficiency [%]
Efficiency [%]
90
80
85
70
80
75
5Vout
1.8Vout
3.3Vout
1.2Vout
2.5Vout
70
0.1 1
2
3
4
5
Output Load [A]
60
50
5Vout
1.8Vout
3.3Vout
1.2Vout
2.5Vout
40
0.1 0.5
1
1.5
2
Output Load [A]
Trim Tables or Calculation
2ADC 3ADC 4ADC 5ADC
.