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 Output Vout Output Efficiency Max. Capacitive
Number Voltage Range Voltage Adjust Range (1) Current @ min Vin @ max. Vin Load (2)
[VDC] [VDC] [VDC]
[A] [%] 12V [%]
[µF]
R-521.2xA 4.5 - 18 1.2 1.0 - 3.0
2
83 79 75
300/6800
R-521.8xA 4.5 - 18 1.8 1.1 - 4.5
2
88 85 82
300/6800
R-522.5xA 4.5 - 18 2.5 1.6 - 5.5
2
91 88 86
300/6800
R-523.3xA 4.5 - 18 3.3 1.6 - 5.5
2
92 90 89
300/6800
R-525.0xA 6.5 - 18 5.0 3.0 - 5.5
2
95 93 92
300/6800
R-531.2xA 4.5 - 18 1.2 1.0 - 3.0
3
85 84 82
300/6800
R-531.8xA 4.5 - 18 1.8 1.1 - 4.5
3
89 88 86
300/6800
R-532.5xA 4.5 - 18 2.5 1.6 - 5.5
3
92 91 89
300/6800
R-533.3xA 4.5 - 18 3.3 1.6 - 5.5
3
94 93 92
300/6800
R-535.0xA 6.5 - 18 5.0 3.0 - 5.5
3
96 95 94
300/6800
R-541.2xA 4.5 - 18 1.2 1.0 - 3.0
4
82 81 79
300/6800
R-541.8xA 4.5 - 18 1.8 1.1 - 4.5
4
87 86 85
300/6800
R-542.5xA 4.5 - 18 2.5 1.6 - 5.5
4
91 89 88
300/6800
R-543.3xA 4.5 - 18 3.3 1.6 - 5.5
4
93 92 91
300/6800
R-545.0xA 6.5 - 18 5.0 3.0 - 5.5
4
95 94 93
300/6800
R-551.2xA 4.4 - 18 1.2 1.0 - 3.0
5
81 80 78
300/6800
R-551.8xA 4.5 - 18 1.8 1.1 - 4.5
5
86 85 84
300/6800
R-552.5xA 4.5 - 18 2.5 1.6 - 5.5
5
90 89 88
300/6800
R-553.3xA 4.5 - 18 3.3 1.6 - 5.5
5
92 91 90
300/6800
R-555.0xA 7.0 - 1.8
5.0
3.0 - 5.5
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.: 4/2018
I-1
