RECOM
RECOM


R-521.2PA

SIP12 Vertical & Horizontal


R-521.2PA Datasheet PDF
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Features
Auto-sense
Non-Isolation
Synchronous rectification design
Adjustable Output voltage
2, 3, 4 & 5AMP Adjustable Positive
Step Down Integrated Switching Regulator
Over load protection (125% full load typical)
Remote ON/OFF Control(Ground Off)
Wide Input Range
UL94V-0 Package Material
Continuous short circuit protection
(Short Circuit Input Current, Iin<50mA)
Input voltage range 4.5V~18V
Efficiency to 96%
Selection Guide
Part
Number
SIP12
R-521.2xA
Inpu
Range
(V)
4.5 – 18
Nominal
Vout Output
Output Voltage Adjust Range Current
(V) (V) (A)
1.2
1.0 – 3.0
2
Efficiency
min.Vin 12V max.Vin
(%) (%) (%)
83 79 75
R-521.8xA
4.5 – 18
1.8
1.1 – 4.5
2
88 85 82
R-522.5xA
4.5 – 18
2.5
1.6 – 5.5
2
91 88 86
R-523.3xA
4.5 – 18
3.3
1.6 – 5.5
2
92 90 89
R-525.0xA
6.5 – 18
5.0
3.0 – 5.5
2
95 93 92
R-531.2xA
4.5 – 18
1.2
1.0 – 3.0
3
85 84 82
R-531.8xA
4.5 – 18
1.8
1.1 – 4.5
3 89www.DataSheet4U.com
88
86
R-532.5xA
4.5 – 18
2.5
1.6 – 5.5
3
92 91 89
R-533.3xA
4.5 – 18
3.3
1.6 – 5.5
3
94 93 92
R-535.0xA
6.5 – 18
5.0
3.0 – 5.5
3
96 95 94
R-541.2xA
4.5 – 18
1.2
1.0 – 3.0
4
82 81 79
R-541.8xA
4.5 – 18
1.8
1.1 – 4.5
4
87 86 85
R-542.5xA
4.5 – 18
2.5
1.6 – 5.5
4
91 89 88
R-543.3xA
4.5 – 18
3.3
1.6 – 5.5
4
93 92 91
R-545.0xA
6.5 – 18
5.0
3.0 – 5.5
4
95 94 93
R-551.2xA
4.5 – 18
1.2
1.0 – 3.0
5
81 80 78
R-551.8xA
4.5 – 18
1.8
1.1 – 4.5
5
86 85 84
R-552.5xA
4.5 – 18
2.5
1.6 – 5.5
5
90 89 88
R-553.3xA
4.5 – 18
3.3
1.6 – 5.5
5
92 91 90
R-555.0xA
7.0 – 18
5.0
3.0 – 5.5
Note: Vin -Vout 1.5V if adjust function is used!
Suffix x: (see mechanical drawing for details)
x = P pins vertical through hole
x = D pins bent for horizontal through hole mounting
5
94 93 92
Description
The R-5XXX series is a high performance 1.2V to 5.0V , 2Amp to 5Amp,12-Pin SIP (single in-line
package) integrated switching regulator (ISR). Synchronuous - rectified design yields excellent efficien-
cies up to 96%. Short circuit protection with crowbar function to reduce the short circuit input current
to under 50mA. Autosense function compensates for any losses in long circuit loops.
INNOLINE
DC/DC-Converter
R-5xxxPA
_DA Series
2, 3, 4, 5 AMP
SIP12
Vertical &
Horizontal
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27-March-2007
155


R-521.2PA Datasheet PDF
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INNOLINE
DC/DC-Converter
R-5xxxPA_DA
Series
Specifications (refer to the standard application circuit, Ta: 25°C)
Characteristics
Output Voltage Range
Output Current
Output Current Limit
Short Circuit Input Current
Short Circuit Protection
Output Voltage Accuracy
Line Voltage Regulation (Vin = min. to max. at full load)
Load Regulation (10 to 100% full load)
Ripple & Noise
Transient Response (see note 1)
Remote ON / OFF (see note 2)
(positive logic)
Remote Off Input Current
Switching Frequency
Quiescent Current
Operating Temperature Range
Storage Temperature Range
Internal Power Dissipation
MTBF (Nominal Vout, 100% load)
Conditions
All Series
R-52xxPA/DA
R-53xxPA/DA
R-54xxPA/DA
R-55xxPA/DA
R-52xxPA/DA
R-53xxPA/DA
R-54xxPA/DA
R-55xxPA/DA
All Series
Min.
0.8
0.2
0.3
0.4
0.5
At 100% Load All Series
R-52xxPA/DA
R-53xxPA/DA & R-54xxPA/DA & R-55xxPA/DA
R-52xxPA/DA
R-53xxPA/DA & R-54xxPA/DA & R-55xxPA/DA
R-52xxPA/DA
R-53xxPA/DA & R-54xxPA/DA & R-55xxPA/DA
50% Load Change
Vout Over / Undershoot
Open or High (Power ON)
Low (Power OFF)
Remote ON/OFF low level
4.5
270
Vin = min. to max. at 0% load
-40°C
-40°C
Io x Vo x (1-Efficiency)
Tamb. = +25°C
Tamb. = +85°C
Typ. Max.
6.0V
2.0A
3.0A
4.0A
5.0A
2.5 3.0A
3.75 4.25A
5.0 5.5A
6.0 6.5A
50mA
Continuous, automatic recovery
±1% ±2%
0.25 0.5%
0.5 1.0%
0.5 1.0%
1.0 2.0%
40mVp-p
80mVp-p
70mVp-p
120mVp-p
100µs
200µs
100mV
18V
0.8V
100µA
300 330kHz
20mA
+85°C
+125°C
1.4W
749 x 10³ hours
150 x 10³ hours
Notes:
1. Requires an electrolytic or tantalum output capacitor for proper operation in all applications (the capacitor to be placed as close as possible to the output pins)
100µF for R-52xxPA/DA, R-53xxPA/DA and R-54xxPA/DA or 220µF for R-55xxPA/DA.
2. ON / OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET.
3. Output Current vs. Input Voltage (see graph below).
156
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R-521.2PA Datasheet PDF
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INNOLINE
DC/DC-Converter
Standard Application Circuit
R-5xxxPA_DA
Series
11 R1
Vin
2, 3, 4
R-52XX
R-53XX
9, 10
(Adjust down)
Vout
1µF C1 1
TTL OFF (Optional)
R-54XX
R-55XX
ON Q1 5, 6, 7,8
12 C2 (Req'd)
100µF/10V
R2
(Adjust up)
or 220µF/10V
(see Note 1)
Com Com
Add a blocking diode to
Vout if current can flow
backwards into the out-
put, as this can damage
the converter..
Parallel Application Circuit
The R-52xx, R-53xx, R-54xx series can be used in parallel to upgrade the output current capacity for
the same output voltage.
For example, the R-543.3PA can parallel up with another R-554.3PA to give up to 8 amps or with the
R-533.3PA or R-523.3PA types to give output currents of up to 7 Amps or 6 Amps.
The R-55xx series cannot be paralleled.
Vin
ON/OFF
Control
Com
1 12
2 U1 11
3 10
Q1 C1 4 5 6 7 8 9
100µF/25V
(REQ`D)
C2-1
100µF/10V
(REQ`D)
C2-2
100µF/10V
(REQ`D)
45
3
2
1
67
U2
89
10
11
12
Vout
Com
must be connected
together
Component side
Solder side
1 12 U1
1 12 U2
Keep 2mm to 5mm distance
between both converters
12 C1
C2-1
12
C2-2
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27-March-2007
To Load
1
U1
1 U2
157


R-521.2PA Datasheet PDF
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INNOLINE
DC/DC-Converter
Output Current vs Input Voltage
R-5xxxPA_DA
Series
How to calculate the max output current
The internal power dissipation(PD)follows the equation:
PD = Io × Vo × (1-η)
Io = PD / Vo × (1-η)
Where PD = Internal power dissipation
Io = Output current
Vo = Output voltage
η = Efficiency
Example: R-545.0P , at Vin = 18Vdc , Vo = 5Vdc ,η=93% (see "Selection Guide" table)
(a) When Ta = 60°C , PD = 1.4 Watt (see adjacent diagram)
Io = 1.4(W) / 5(V) × (1-0.93) = 4(A)
(b) When Ta = 85°C , PD = 1 Watt (see adjacent diagram)
Io = 1(W) / 5(V) × (1-0.93) = 2.857(A)
(c) At Vin = 12Vdc efficiency = 94% (see "Selection Guide" table)
When Ta = 85°C , PD = 1 Watt (see adjacent diagram)
Io = 1(W) / 5(V) × (1-0.94) =3.33(A)
90
85
80
60
40
20
0 0.5 1 1.4
Internal Power Dissipation (W)
Characteristics
R-53xx / R-54xx
Output Voltage Line Regulation VS Vout
1
0.5
0 1.2 1.8 2.3 3.3 5.0
Output Voltage (V)
R-52xx / R-55xx
Output Voltage Line Regulation VS Vout
1
0.5
0 1.2 1.8 2.3 3.3 5.0
Output Voltage (V)
R-53xx / R-54xx
Intput Voltage Load Regulation VS Vin
2.0
1.5
1.0
0.5
05
Input Voltage (V)
10
15
1.2V
1.8V
2.5V
3.3V
5.0V
20
R-52xx / R-55xx
Intput Voltage Load Regulation VS Vin
2.0
1.5
1.0
0.5
05
Input Voltage (V)
10
15
1.2V
1.8V
2.5V
3.3V
5.0V
20
158
27-March-2007
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INNOLINE
DC/DC-Converter
Characteristics
R-53xx / R-54xx / R-55xx
Output Current Efficiency vs Iout (Vin = Min)
100
5.0V
90
3.3V
2.5V
1.8V
80 1.2V
70
1 23 4 5
Output Current (A)
R-53xx / R-54xx / R-55xx
Output Current Efficiency vs Iout (Vin = 18V)
100
5.0V
90 3.3V
2.5V
1.8V
80
1.2V
70
1 23 4 5
Output Current (A)
Package Style and Pinning (mm)
SIP12 PIN Package
32.20
RECOM
15.00 R - 5 2 1 . 2 P A
1 2 3 4 5 6 7 8 9 10 11 12
4.0
2.13 0.7 2.54
9.1
0.2
R-5xxxPA_DA
Series
R-52xx
Output Current Efficiency vs Iout (Vin = Min)
100
5.0V
3.3V
90 2.5V
1.8V
1.2V
80
70
0.5 1.0 1.5 2.0
Output Current (A)
R-52xx
Output Current Efficiency VS Iout (Vin = 18V)
100
90
80
70
60
50
40
0.5 1.0 1.5 2.0
Output Current (A)
5.0V
3.3V
2.5V
1.8V
1.2V
32.20
RECOM
15.00 R - 5 2 1 . 2 D A
1 2 3 4 5 6 7 8 9 10 11 12
2.13 0.7 2.54
3rd angle
projection
9.1
0.2
Bottom
View
0.7
Bottom
View
Pin Connections
Pin #
Name
1
2, 3, 4
ON / OFF
Vin
5, 6, 7, 8
GND
9 , 10
Vout
11 Vout (Auto Sense)
12 Vout-Adj
Tolerance:
± 0.25 mm
Description
Input pin : Active low (less than 0.8V) to disable the device
Power input
Input and output ground (common)
Power output
If unused this pin must be connected to Pin 9 and 10
With external resistors R1,R2 to selected output voltage
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27-March-2007
0.7
4.0
159


R-521.2PA Datasheet PDF
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INNOLINE
DC/DC-Converter
R-5xxxPA_DA
Series
Table 1: Adjustment Resistor Values
2Adc
3Adc
4Adc
5Adc
Vout (nominal)
R-521.2PA/DA
R-531.2PA/DA
R-541.2PA/DA
R-551.2PA/DA
1.2Vdc
R-521.8PA/DA
R-531.8PA/DA
R-541.8PA/DA
R-551.8PA/DA
1.8Vdc
R-522.5PA/DA
R-532.5PA/DA
R-542.5PA/DA
R-552.5PA/DA
2.5Vdc
R-523.3PA/DA
R-533.3PA/DA
R-543.3PA/DA
R-553.3PA/DA
3.3Vdc
R-525.0PA/DA
R-535.0PA/DA
R-545.0PA/DA
R-555.0PA/DA
5.0Vdc
Vout (adj)
0.8 (V)
0.9 (V)
1.0 (V)
1.1 (V)
1.2 (V)
1.3 (V)
1.5 (V)
1.6 (V)
1.7 (V)
1.8 (V)
1.9 (V)
2.0 (V)
2.4 (V)
2.5 (V)
2.6 (V)
3.0 (V)
3.2 (V)
3.3 (V)
3.4 (V)
3.6 (V)
3.9 (V)
4.5 (V)
4.9 (V)
5.0 (V)
5.1 (V)
5.5 (V)
R1
R2 R1
R2 R1
R2 R1 R2 R1 R2
740
3.9K
13K
37K
11.5K
8.2K
6.5K
5.2K
4.3K
3.6K
2.1K
1.8K
1.65K
1.05K
1.05K
2.1K
3.7K
10K
18K
41K
36K
1.8K
5.2K
4.3K
3.6K
2.1K
1.65K
1.5K
1.35K
1.07K
780
390
270
750
2.1K
3.0K
4.1K
5.6K
7.5K
10.5K
82K
33K
6.2K
4.1K
3.4K
2.9K
2.2K
1.4K
650
350
290
220
39
390
750
1.2K
1.7K
2.2K
2.8K
6.8K
8.5K
10.5K
33K
110K
36K
11K
4.7K
1.6K
820
680
560
190
470
1.6K
2.2K
3.0K
4.7K
8.5K
30K
220K
28K
2.6K
160
27-March-2007
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