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1
24-August-2005
2, 3, 4 AMP
SIP12
Vertical
&
&
Horizontal
INNOLINE
DC/DC-Converter
R-7xxxP_D
Series
Non-Isolated
Synchronous rectification design
Adjustable Output voltage
2, 3, 4AMP 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 current Iin<50mA)
Input voltage range 4.5V~28V
Efficiency to 97%
Features
Selection Guide
Part
Input
Nominal
Vout
Output
Efficiency (%)
Number
Range
Output Voltage
Adjust Range
Current
Min. Vin 12V Max. Vin
SIP12
(V)
(V)
(V)
(A)
R-723.3x
4.5 28
3.3
2.5 5.5
2
95
93
89
R-725.0x
6.5 28
5.0
3.0 6.0
2
96
95
91
R-726.5x
8.5 28
6.5
5.0 8.0
2
97
96
93
R-729.0x
12 28
9.0
7.0 11
2
96
-
93
R-7212x
15 28
12
10 14
2
97
-
95
R-7215x
19 28
15
13 17
2
97
-
96
R-733.3x
4.5 28
3.3
2.5 5.5
3
94
93
89
R-735.0x
6.5 28
5.0
3.0 6.0
3
95
95
92
R-736.5x
8.5 28
6.5
5.0 8.0
3
97
96
93
R-739.0x
12 28
9.0
7.0 11
3
96
-
94
R-7312x
15 28
12
10 14
3
97
-
96
R-7315x
19 28
15
13 17
3
97
-
96
R-743.3x
4.5 28
3.3
2.5 5.5
4
93
92
88
R-745.0x
6.5 28
5.0
3.0 6.0
4
95
94
91
R-746.5x
8.5 28
6.5
5.0 7.5
4
96
96
93
Note: Vin-Vout
1.5V~4.0V depending on Vout 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-7XXX series is a high performance 2.5V to 15V , 2Amp to 4Amp,12-Pin SIP (single in-line
package).Integrated switching regulator (ISR), Synchronuous - rectified design yields excellent efficien-
cies up to 97%. Short circuit protection with crowbar function to reduce the short circuit current to
under 50mA of input current.
Description
2
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24-August-2005
Characteristics
Conditions
Min.
Typ.
Max.
Output Voltage Range
All Series
2.5
17V
Output Current
R-72xxP/D
0.2
2.0A
R-73xxP/D
0.3
3.0A
R-74xxP/D
0.4
4.0A
Output Current Limit
R-72xxP/D
2.5
3.0A
R-73xxP/D
3.75
4.25A
R-74xxP/D
5.0
5.5A
Short Circuit Input Current
All Series
50
100mA
Output Voltage Accuracy (At 100% Load)
All Series
1%
2%
Line Voltage Regulation (Vin = min. to max. at full load)
All Series
0.5
1.0%
Load Regulation (10 to 100% full load)
All Series
0.5
1.0%
Ripple & Noise
All Series
40mVp-p
70mVp-p
Transient Response (see note 1)
50% Load Change
100S
200s
Vout Over / Undershoot
100mV
Remote ON / OFF (see note 2)
Open or High (Power ON)
4.5
28V
Low (Power OFF)
0.8V
Switching Frequency
270
300
330kHz
Shutdown current
ON / OFF Pin pulled low
100A
Quiescent Current
Vin = min. to max. at 0% load
30mA
Operating Temperature Range
-40C
+85C
Operating Case Temperature
+110C
Storage Temperature Range
-40C
+125C
Thermal Impedance
Natural Convection
25C/W
Internal Power Dissipation
Ta < 60C
1.4W
MTBF (Nominal Vout, 100% load)
Tamb. = +25C
749kHrs
Tamb. = +85C
150kHrs
R-7xxxP_D
Series
Specifications (refer to the standard application circuit, Ta: 25C)
INNOLINE
DC/DC-Converter
Standard Application Circuit
Vout
Com
Vin
TTL
Com
2, 3, 4
9, 10, 11
R-72XX
R-73XX
R-74XX
R1
(Adjust down)
R2
(Adjust up)
12
5, 6, 7,8
1F
(Optional)
1
C1
OFF
ON
Q1
C2
100F/10V
(REQ`D)
Notes:
1. Requires a 100F electrolytic or tantalum output capacitor for proper operation in all applications (the capacitor to be placed as close as possible to the output pins).
2. ON / OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET.
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24-August-2005
R-7xxxP_D
Series
Output Current vs Input Voltage
INNOLINE
DC/DC-Converter
Ambient
T
emperature (C)
90
60
20
40
1.4
1
0.5
Internal Power Dissipation (W)
0
80
85
H
Hoow
w ttoo ccaallccuullaattiinngg tthhee m
maaxx oouuttppuutt ccuurrrreenntt
The internal power dissipation(P
D
)follows the equation:
P
D
= Io Vo (1-
)
Io = P
D
/ Vo (1-
)
Where
P
D
= Internal power dissipation
Io = Output current
Vo = Output voltage
= Efficiency
Example: R-745.0P , at Vin = 28Vdc , Vo = 5Vdc ,
=91% (see table 1)
(a) When Ta = 60C , P
D
= 1.4 Watt (see fig-1)
Io = 1.4(W) / 5(V) (1-0.91) = 3.11(A)
(b) When Ta = 85C , P
D
= 1 Watt (see fig-1)
Io = 1(W) / 5(V) (1-0.91) = 2.222(A)
(c) At Vin = 12Vdc efficiency = 94% (see table 1)
When Ta = 85C , P
D
= 1 Watt (see fig-1)
Io = 1(W) / 5(V) (1-0.94) =3.33(A)
Characteristics
Ripple (mV)
50
5
Ripple Vs Vin
Vo=9V
Vo=3.3V
Vo=5V
Vo=12V
25
Vin ( V )
10
15
20
25
28
Vo=6.5V
Vo=15V
( Vo )
Ripple (mV)
100
5
Ripple Vs Vin
3.3V
5V
50
Vin ( V )
10
15
20
25
28
6.5V
( Vo )
R-72xx / R-73xx
Ripple VS Vin
R-74xx
Ripple VS Vin
Efficiency (%)
100
5
Efficiency Vs Vin
3.3V
5V
50
Vin ( V )
10
15
20
25
28
6.5V
15V
( Vo )
Efficiency (%)
100
5
Efficiency Vs Vin
Vo=3.3V
Vo=5V
50
Vin ( V )
10
15
20
25
28
Vo=6.5V
( Vo )
R-72xx / R-73xx
Efficiency VS Vin
R-74xx
Efficiency VS Vin
Efficiency (%)
100
1
4
2
3
90
Efficiency Vs Iout (Vin=Min)
80
70
6.5V
3.3V
5.0V
( Vo )
Efficiency (%)
100
1
4
2
3
90
Efficiency Vs Iout (Vin=Max)
80
60
15V
3.3V
5.0V
( Vo )
R-72xx / R-73xx / R-74xx
Efficiency / Load Vin=Min
R-72xx / R-73xx / R-74xx
Efficiency / Load Vin=Max
4
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24-August-2005
R-7xxxP_D
Series
Package Style and Pinning (mm)
INNOLINE
DC/DC-Converter
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, 11
Vout
Power output
12
Vout-Adj
With external resistors R1,R2 to selected output voltage
Tolerance: 0.25 mm
Bottom
View
1 2 3 4 5 6 7 8 9
2.54
0.7
4.0
15.00
32.20
10 11 12
2.13
9.1
0.2
Bottom
View
4.0
0.7
0.7
1 2 3 4 5 6 7 8 9
2.54
0.7
15.00
32.20
10 11 12
9.1
0.2
RECOM
R- 723.3P
RECOM
R- 723.3D
2.13
3rd angle
projection
SIP12 PIN Package
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24-August-2005
R-7xxxP_D
Series
Table 1: Adjustment Resistor Values
2A DC
R-723.3P/D
R-725.0P/D
R-726.5P/D
R-729.0P/D
R-7212P/D
R-7215P/D
3A DC
R-733.3P/D
R-735.0P/D
R-736.5P/D
R-739.0P/D
R-7312P/D
R-7315P/D
4A DC
R-743.3P/D
R-745.0P/D
R-746.5P/D
-
-
-
Vout (nominal)
3.3VDC
5.0VDC
6.5VDC
9.0VDC
12VDC
15VDC
Vout (adj)
R1
R2
R1
R2
R1
R2
R1
R2
R1
R2
R1
R2
2.5
8.5K
3.0
33K
470
3.2
110K
1.6K
3.3
2.2K
3.4
36K
3.0K
3.6
11K
4.7K
3.9
4.7K
8.5K
4.5
1.6K
30K
4.9
820
220K
5.0
680
11K
5.1
560
28K
12K
5.5
190
2.6K
20K
6.0
47K
6.5
7.0
560
13K
8.0
330
31K
9.0
10
2.2K
20K
11
390
47K
12
13
2.4K
36K
14
390
76K
15
16
2.6K
17
860
18
INNOLINE
DC/DC-Converter
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