Features
Switching
Regulator
Description
•
•
•
•
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
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
Number
R-521.2xA
R-521.8xA
R-522.5xA
R-523.3xA
R-525.0xA
R-531.2xA
R-531.8xA
R-532.5xA
R-533.3xA
R-535.0xA
R-541.2xA
R-541.8xA
R-542.5xA
R-543.3xA
R-545.0xA
R-551.2xA
R-551.8xA
R-552.5xA
R-553.3xA
R-555.0xA
Input
Output
Vout
Output
Voltage Range Voltage Adjust Range
(1)
Current
[VDC]
[VDC]
[VDC]
[A]
4.5 - 18
1.2
1.0 - 3.0
2
4.5 - 18
1.8
1.1 - 4.5
2
4.5 - 18
2.5
1.6 - 5.5
2
4.5 - 18
3.3
1.6 - 5.5
2
6.5 - 18
5.0
3.0 - 5.5
2
4.5 - 18
1.2
1.0 - 3.0
3
4.5 - 18
1.8
1.1 - 4.5
3
4.5 - 18
2.5
1.6 - 5.5
3
4.5 - 18
3.3
1.6 - 5.5
3
6.5 - 18
5.0
3.0 - 5.5
3
4.5 - 18
1.2
1.0 - 3.0
4
4.5 - 18
1.8
1.1 - 4.5
4
4.5 - 18
2.5
1.6 - 5.5
4
4.5 - 18
3.3
1.6 - 5.5
4
6.5 - 18
5.0
3.0 - 5.5
4
4.4 - 18
1.2
1.0 - 3.0
5
4.5 - 18
1.8
1.1 - 4.5
5
4.5 - 18
2.5
1.6 - 5.5
5
4.5 - 18
3.3
1.6 - 5.5
5
7.0 - 1.8
5.0
3.0 - 5.5
5
Efficiency
Max. Capacitive
@ min Vin @ max. Vin
Load
(2)
[%] 12V [%]
[µF]
83 79 75
300/6800
88 85 82
300/6800
91 88 86
300/6800
92 90 89
300/6800
95 93 92
300/6800
85 84 82
300/6800
89 88 86
300/6800
92 91 89
300/6800
94 93 92
300/6800
96 95 94
300/6800
82 81 79
300/6800
87 86 85
300/6800
91 89 88
300/6800
93 92 91
300/6800
95 94 93
300/6800
81 80 78
300/6800
86 85 84
300/6800
90 89 88
300/6800
92 91 90
300/6800
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
www.recom-power.com
nom. Vout= 3.3VDC
nom. Vout= 2.5VDC
P= vertical through hole
D= bent for horizontal through hole mounting
REV.: 4/2018
I-1
R-5xxxPA_DA
DC/DC Converter
Specifications
(refer to standard application circuit, Ta= 25°C)
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
R-52xx
R-53xx & R-54xx & R-55xx
normal start-up time, no external diodes
<1 second start-up time + diode protection circuit
Notes:
Note4: ON/OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET
DC-DC ON
DC-DC OFF
DC-DC OFF
270kHz
300kHz
40mVp-p
80mVp-p
Series
Condition
min. Vin to max.
ta<60°C
R-52xx
R-53xx
R-54xx
R-55xx
10%
Open or high, 4.5V min. / 18V max.
Low (Power OFF) 0.8V max.
100µA
330kHz
70mVp-p
120mVp-p
300µF
6800µF
2.5A
3.75A
5.0A
6.0A
Min.
Typ.
Max.
20mA
1.4W
3.0A
4.25A
5.5A
6.5A
How to calculate the max output current
The internal power dissipiation (P
D
) follows the equation:
P
D
=
Iout=
Iout x Vout x (1-Eff
max Vin
)
P
D
Vout x (1-Eff
max Vin
)
100
Ambient Temperature [°C]
85
80
60
40
20
0
0
0.5
1
1.4
Example:
R-545.0P
Calculation 1:
Vin = 18V
Vout = 5V
Eff
max Vin
= 93%
P
D
= 1.4W
T
Ambient
= 60°C
Internal Power Dissipation [W]
Calculation 2:
Vin = 18V
Vout = 5V
Eff
max Vin
= 93%
P
D
= 1W
T
Ambient
= 85°C
Iout=
1.4W
5V x (1-0.93 )
= 4.0A
Iout=
1W
5V x (1-0.93 )
= 2.857A
Calculation 3:
Vin = 12V
Eff
max Vin
= 94%
P
D
= 1.0W
T
Ambient
= 85°C
Iout=
1W
5V x (1-0.94 )
= 3.33A
continued on next page
www.recom-power.com
REV.: 4/2018
I-2
R-5xxxPA_DA
DC/DC Converter
Specifications
(refer to standard application circuit, Ta= 25°C)
Efficiency vs. Load
R-53xx / R-54xx / R-55xx
min. Vin
100
95
100
95
Series
R-52xx
min. Vin
Efficiency [%]
90
85
80
75
70
Efficiency [%]
5Vout
3.3Vout
2.5Vout
1.8Vout
1.2Vout
90
85
80
75
70
5Vout
3.3Vout
2.5Vout
1.8Vout
1.2Vout
0.1
1
2
3
4
5
0.1
0.5
1
1.5
2
Output Load [A]
R-53xx / R-54xx / R-55xx
Vin=18V
Output Load [A]
R-52xx
Vin=18V
100
95
100
90
Efficiency [%]
90
85
80
75
70
5Vout
3.3Vout
2.5Vout
1.8Vout
1.2Vout
Efficiency [%]
80
70
60
50
40
5Vout
3.3Vout
2.5Vout
1.8Vout
1.2Vout
0.1
1
2
3
4
5
0.1
0.5
1
1.5
2
Output Load [A]
Trim Tables or Calculation
2ADC
3ADC
4ADC
5ADC
Vout nom.
Vout adj.
0.8
0.9
1.0
1.1
1.2
740Ω
3.9kΩ
13kΩ
1.05kΩ
2.1kΩ
270Ω
continued on next page
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REV.: 4/2018
Output Load [A]
R-521.2PA/DA
R-531.2PA/DA
R-541.2PA/DA
R-551.2PA/DA
1.2VDC
R1
R2
R-521.8PA/DA
R-531.8PA/DA
R-541.8PA/DA
R-551.8PA/DA
1.8VDC
R1
R2
R-522.5PA/DA
R-532.5PA/DA
R-542.5PA/DA
R-552.5PA/DA
2.5VDC
R1
R2
R-523.3PA/DA
R-533.3PA/DA
R-543.3PA/DA
R-553.3PA/DA
3.3VDC
R1
R2
R-525.0PA/DA
R-535.0PA/DA
R-545.0PA/DA
R-555.0PA/DA
5.0VDC
R1
R2
I-3
R-5xxxPA_DA
DC/DC Converter
Specifications
(refer to standard application circuit, Ta= 25°C)
Trim Tables or Calculation
2ADC
3ADC
4ADC
5ADC
Vout nom.
Vout adj.
1.3
1.5
1.6
1.7
1.8
1.9
2.0
2.4
2.5
2.6
3.0
3.2
3.3
3.4
3.6
3.9
4.5
4.9
5.0
5.1
5.5
R-521.2PA/DA
R-531.2PA/DA
R-541.2PA/DA
R-551.2PA/DA
1.2VDC
R1
R2
37kΩ
11.5kΩ
8.2kΩ
6.5kΩ
5.2kΩ
4.3kΩ
3.6kΩ
2.1kΩ
1.8kΩ
1.65kΩ
1.05kΩ
36kΩ
1.8kΩ
5.2kΩ
4.3kΩ
3.6kΩ
2.1kΩ
1.65kΩ
1.5kΩ
1.35kΩ
1.07kΩ
780Ω
390Ω
33kΩ
6.2kΩ
4.1kΩ
3.4kΩ
2.9kΩ
2.2kΩ
1.4kΩ
650Ω
350Ω
290Ω
220Ω
39Ω
36kΩ
11kΩ
4.7kΩ
1.6Ω
820Ω
680Ω
560Ω
190Ω
28kΩ
2.6kΩ
R1
3.7kΩ
10kΩ
18kΩ
41kΩ
R-521.8PA/DA
R-531.8PA/DA
R-541.8PA/DA
R-551.8PA/DA
1.8VDC
R2
R1
750Ω
2.1KΩ
3.0KΩ
4.1KΩ
5.6KΩ
7.5KΩ
10.5KΩ
82KΩ
390Ω
750Ω
1.2kΩ
1.7kΩ
2.2kΩ
2.8kΩ
6.8kΩ
8.5kΩ
10.5kΩ
33kΩ
110kΩ
470Ω
1.6kΩ
2.2kΩ
3.0kΩ
4.7kΩ
8.5kΩ
30kΩ
220kΩ
R-522.5PA/DA
R-532.5PA/DA
R-542.5PA/DA
R-552.5PA/DA
2.5VDC
R2
R1
R-523.3PA/DA
R-533.3PA/DA
R-543.3PA/DA
R-553.3PA/DA
3.3VDC
R2
R1
R-525.0PA/DA
R-535.0PA/DA
R-545.0PA/DA
R-555.0PA/DA
5.0VDC
R2
Series
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
(5)
Transient Response
(6)
low line to high line, full load
10% to 100%, full load
R-52xx
R-53xx & R-54xx & R-55xx
R-52xx
R-53xx & R-54xx & R-55xx
Condition
Value
±1.0% typ. / ±2.0% max.
±0.25% typ. / ±0.5% max.
±0.5% typ. / ±1.0% max.
±0.5% typ. / ±1.0% max.
±1.0% typ. / ±2.0% max.
100µs typ. / 200µs max.
100mV max.
50% load step change
Vout Over / Undershoot
Notes:
Note5: Operation below 10% load will not harm the converter, but specifications may not be met
Note6: Requires a 100µF electronic or tantalum output capacitpr for proper operation in all applications
(the capacitor has to be placed as close as possible to the output pins):
100µF for R-52xxx, R-53xx and R-54xx, 220µF for R-55xx
continued on next page
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REV.: 4/2018
I-4
R-5xxxPA_DA
DC/DC Converter
Specifications
(refer to standard application circuit, Ta= 25°C)
Line Regulation
R-53xx / R-54xx
1
1
Series
R-52xx / R- 55xx
Line Regulation [%]
Line Regulation [%]
0.5
0.5
0
1.2
1.8
2.3
3.3
5.0
0
1.2
1.8
2.3
3.3
5.0
Output Voltage [V]
Output Voltage [V]
Load Regulation
R-53xx / R-54xx
2.0
2.0
5Vout
3.3Vout
2.5Vout
1.8Vout
1.2Vout
R-52xx / R- 55xx
1.5
1.5
Load Regulation [%]
1.0
5Vout
3.3Vout
2.5Vout
1.8Vout
1.2Vout
Load Regulation [%]
18
1.0
0.5
0.5
0
0
5.0
10
15
0
0
5.0
10
15
18
Input Voltage [V]
Input Voltage [V]
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Short Circuit Input Current
continued on next page
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REV.: 4/2018
I-5
Condition
Value
continuous, automatic recovery
50mA max.
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