128 www.recom-international.com24-August-2005
2, 3, 4, 5 AMP
SIP12
Vertical &&
Horizontal
INNOLINE
DC/DC-Converter
R-5xxxPA
_DA Series
●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
●Continuous short circuit protection
(Very low short input current: Iin<50mA)
●Input voltage range 4.5V~18V
●Efficiency to 96%
Features
Selection Guide
Part Inpu Nominal Vout Output Efficiency (%)
Number Range Output Voltage Adjust Range Current min max
SIP12 (V) (V) (V) (A) Vin 12V Vin
R-521.2xA 4.5 – 18 1.2 1.0 – 3.0 2 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 89 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 5 94 93 92
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
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 current under 50mA
of input current. Autosense function compensates for any losses in long circuit loops.
Description
Characteristics Conditions Min. Typ. Max.
Output Voltage Range All Series 0.8 6.0V
Output Current R-52xxPA/DA 0.2 2.0A
R-53xxPA/DA 0.3 3.0A
R-54xxPA/DA 0.4 4.0A
R-55xxPA/DA 0.5 5.0A
Output Current Limit R-52xxPA/DA 2.5 3.0A
R-53xxPA/DA 3.75 4.25A
R-54xxPA/DA 5.0 5.5A
R-55xxPA/DA 6.0 6.5A
Short Circuit Input Current All Series 50mA
Output Voltage Accuracy At 100% Load All Series ±1% ±2%
Line Voltage Regulation (Vin = min. to max. at full load) R-52xxPA/DA 0.25 0.5%
R-53xxPA/DA & R-54xxPA/DA & R-55xxPA/DA 0.5 1.0%
Load Regulation (10 to 100% full load) R-52xxPA/DA 0.5 1.0%
R-53xxPA/DA & R-54xxPA/DA & R-55xxPA/DA 1.0 2.0%
Ripple & Noise R-52xxPA/DA 40mVp-p 70mVp-p
R-53xxPA/DA & R-54xxPA/DA & R-55xxPA/DA 80mVp-p 120mVp-p
Transient Response (see note 1) 50% Load Change 100µS 200µs
Vout Over / Undershoot 100mV
Remote ON / OFF (see note 2) Open or High (Power ON) 4.5 18V
(positive logic) Low (Power OFF) 0.8V
Remote Off Input Current Remote ON/OFF low level 100µA
Switching Frequency 270 300 330kHz
Quiescent Current Vin = min. to max. at 0% load 20mA
Operating Temperature Range -40°C +85°C
Storage Temperature Range -40°C +125°C
Internal Power Dissipation Io x Vo x (1-Efficiency) 1.4W
MTBF (Nominal Vout, 100% load) Tamb. = +25°C 749kHrs
Tamb. = +85°C 150kHrs
R-5xxxPA_DA
Series
Specifications (refer to the standard application circuit, Ta: 25°C)
INNOLINE
DC/DC-Converter
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).
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R-5xxxPA_DA
Series
Standard Application Circuit
INNOLINE
DC/DC-Converter
Vout
Com
Vin
TTL
Com
2, 3, 4 9, 10
R-52XX
R-53XX
R-54XX
R-55XX
R1
(Adjust down)
R2
(Adjust up)
12
5, 6, 7,8
1µF
(Optional) 1
C1
OFF
ON Q1
C2 (Req'd)
100µF/10V
or 220µF/10V
(see Note 1)
11
Com
ON/OFF
Control
Q1 C1
100µF/25V
(REQ`D)
Vin
1
C2-1
100µF/10V
(REQ`D)
C2-2
100µF/10V
(REQ`D)
Com
Vout
must be connected
together
2
3
456789
10
11
12
1
2
3
456789
10
11
12
U2
U1
112
112
U1
U2
Keep 2mm to 5mm distance
between both converters
Component side
1
U1
U2
To Load
C1 1
12
12
C2-1
+Vin
C2-2
Com Com
+Vout
Sense
Solder side
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.
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R-5xxxPA_DA
Series
Output Current vs Input Voltage
INNOLINE
DC/DC-Converter
Ambient Temperature (°C)
90
60
20
40
1.4
10.5
Internal Power Dissipation (W)
0
80
85
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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 table 1)
(a) When Ta = 60°C , PD= 1.4 Watt (see fig-1)
Io = 1.4(W) / 5(V) × (1-0.93) = 4(A)
(b) When Ta = 85°C , PD= 1 Watt (see fig-1)
Io = 1(W) / 5(V) × (1-0.93) = 2.857(A)
(c) At Vin = 12Vdc efficiency = 94% (see table 1)
When Ta = 85°C , PD= 1 Watt (see fig-1)
Io = 1(W) / 5(V) × (1-0.94) =3.33(A)
Characteristics
Line Regulation (%)
1
1.8
05.0
2.3 3.3
1.2
0.5
Output Voltage (V)
Line Regulation (%)
1
1.8
05.0
2.3 3.3
1.2
0.5
Output Voltage (V)
R-53xx / R-54xx
Output Voltage Line Regulation VS Vout
R-52xx / R-55xx
Output Voltage Line Regulation VS Vout
Load Regulation (%)
2.0
5
020
10 15
1.5
Input Voltage (V)
1.0
0.5
1.2V
1.8V
2.5V
3.3V
5.0V
Load Regulation (%)
2.0
5
020
10 15
1.5
Input Voltage (V)
1.0
0.5
1.2V
1.8V
2.5V
3.3V
5.0V
R-53xx / R-54xx
Intput Voltage Load Regulation VS Vin
R-52xx / R-55xx
Intput Voltage Load Regulation VS Vin
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R-5xxxPA_DA
Series
Characteristics
INNOLINE
DC/DC-Converter
Efficiency (%)
100
14
23
90
Output Current (A)
80
70
1.2V
1.8V
2.5V
3.3V
5.0V
5
Efficiency (%)
100
0.5 2.0
1.0 1.5
90
Output Current (A)
80
70
1.2V
1.8V
2.5V
3.3V
5.0V
R-53xx / R-54xx / R-55xx
Output Current Efficiency vs Iout (Vin = Min)
R-52xx
Output Current Efficiency vs Iout (Vin = Min)
Efficiency (%)
100
14
23
90
Output Current (A)
80
70
1.2V
1.8V
2.5V
3.3V
5.0V
5
Efficiency (%)
100
0.5 2.0
1.0 1.5
80
Output Current (A)
60
40
1.2V
1.8V
2.5V
3.3V
5.0V
50
70
90
R-53xx / R-54xx / R-55xx
Output Current Efficiency vs Iout (Vin = 18V)
R-52xx
Output Current Efficiency VS Iout (Vin = 18V)
Pin Connections
Pin # Name Description
1 ON / OFF Input pin : Active low (less than 0.8V) to disable the device
2, 3, 4 Vin Power input
5, 6, 7, 8 GND Input and output ground (common)
9 , 10 Vout Power output
11 Vout (Auto Sense) If unused this pin must be connected to Pin 9 and 10
12 Vout-Adj With external resistors R1,R2 to selected output voltage
Tolerance:
± 0.25 mm
Package Style and Pinning (mm)
3rd angle
projection
SIP12 PIN Package
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24-August-2005
R-5xxxPA_DA
Series
Table 1: Adjustment Resistor Values
INNOLINE
DC/DC-Converter
22AAddccRR--552211..22PPAA//DDAARR--552211..88PPAA//DDAARR--552222..55PPAA//DDAARR--552233..33PPAA//DDAA RR--552255..00PPAA//DDAA
33AAddccRR--553311..22PPAA//DDAARR--553311..88PPAA//DDAARR--553322..55PPAA//DDAARR--553333..33PPAA//DDAARR--553355..00PPAA//DDAA
44AAddccRR--554411..22PPAA//DDAARR--554411..88PPAA//DDAARR--554422..55PPAA//DDAARR--554433..33PPAA//DDAARR--554455..00PPAA//DDAA
55AAddccRR--555511..22PPAA//DDAARR--555511..88PPAA//DDAARR--555522..55PPAA//DDAARR--555533..33PPAA//DDAARR--555555..00PPAA//DDAA
Vout (nominal) 11..22VVddcc11..88VVddcc22..55VVddcc33..33VVddcc55..00VVddcc
VVoouutt ((aaddjj))RR11RR22RR11RR22RR11RR22RR11RR22RR11RR22
0.8 (V)
0.9 (V) 740Ω
1.0 (V) 3.9KΩ
1.1 (V) 13KΩ1.05KΩ
1.2 (V) 2.1KΩ270Ω
1.3 (V) 37KΩ3.7KΩ750Ω
1.5 (V) 11.5KΩ10KΩ2.1KΩ390Ω
1.6 (V) 8.2KΩ18KΩ3.0KΩ750Ω
1.7 (V) 6.5KΩ41KΩ4.1KΩ1.2KΩ
1.8 (V) 5.2KΩ5.6KΩ1.7KΩ
1.9 (V) 4.3KΩ36KΩ7.5KΩ2.2KΩ
2.0 (V) 3.6KΩ1.8KΩ10.5KΩ2.8KΩ
2.4 (V) 2.1KΩ5.2KΩ82KΩ6.8KΩ
2.5 (V) 1.8KΩ4.3KΩ8.5KΩ
2.6 (V) 1.65KΩ3.6KΩ33KΩ10.5KΩ
3.0 (V) 1.05KΩ2.1KΩ6.2KΩ33KΩ470Ω
3.2 (V) 1.65KΩ4.1KΩ110KΩ1.6KΩ
3.3 (V) 1.5KΩ3.4KΩ2.2KΩ
3.4 (V) 1.35KΩ2.9KΩ36KΩ3.0KΩ
3.6 (V) 1.07KΩ2.2KΩ11KΩ4.7KΩ
3.9 (V) 780Ω1.4KΩ4.7KΩ8.5KΩ
4.5 (V) 390Ω650Ω1.6KΩ30KΩ
4.9 (V) 350Ω820Ω220KΩ
5.0 (V) 290Ω680Ω
5.1 (V) 220Ω560Ω28KΩ
5.5 (V) 39Ω190Ω2.6KΩ