NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 5A
SRAH-05A / VRAH-05A Series
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•
•
•
•
•
•
•
•
Nonisolated
Compact, low profile surface mount package
Fixed frequency
High efficiency means less power dissipation
Excellent thermal performance
Optimized for cost
Remote on/off
Undervoltage lockout (UVLO)
Over current and short circuit protection
POWER PRODUCTS
BP05xRAH-05A
Description
The Bel SRAH-05A and VRAH-05A modules are a series of non-isolated, step down DC/DC power converters that operate
from a nominal 12V source. These converters are available in a range of output voltages from 0.9V to 5.0V. They are packaged
in a compact, overmolded package rated at 5A. Optional lead forming provides a vertical mount product for minimal footprint or
a surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit protection,
output voltage adjust and industrial temperature ranges (-40° to +85° C). The output is closely regulated and the efficiency is
typically 91.5% at full load. These products may be used almost anywhere low voltage silicon is employed and a 12V source is
available. Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
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Distributed power architectures
Data networking equipment
Telecommunications
Computers and peripherals
Part Number Selection
Output
Voltage
5.0V
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.9 ~ 3.63V
0.9 ~ 3.63V
Input
Voltage
12V
12V
12V
12V
12V
12V
12V
12V
12V
12V
12V
Max. Output
Current
5A
5A
5A
5A
5A
5A
5A
5A
5A
5A
5A
Max. Output
Power
25W
25W
16.5W
12.5W
9.0W
7.5W
6.0W
5.0W
4.5W
18.2W
18.2W
Typical
Efficiency
91.5%
91.5%
88%
86%
83%
81%
78%
76%
73%
88%
88%
Part Number
Surface Mount
SRAH-05A500
SRAH-05A50F*
SRAH-05A330
SRAH-05A250
SRAH-05A180
SRAH-05A150
SRAH-05A120
SRAH-05A100
SRAH-05A090
SRAH-05A1A0
SRAH-05A1AF*
Part Number
Vertical Mount
VRAH-05A500
VRAH-05A50F*
VRAH-05A330
VRAH-05A250
VRAH-05A180
VRAH-05A150
VRAH-05A120
VRAH-05A100
VRAH-05A090
VRAH-05A1A0
VRAH-05A1AF*
* F indicates fast start up.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1
POWER PRODUCTS
BP05xRAH-05A
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 5A
Absolute Maximum Ratings
Parameter
Continuous Input Voltage
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Symbol
Vin
Vouten
Tamb
Tstor
Min
-0.3
-0.3
-40
-40
Typical
Max
15
15
85
125
Unit
V
V
°C
°C
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC
converter or may permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
Input Current
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
No Load Input Current
Remote Off Input Current
Input Reflected Ripple Current
1
Input Reflected Ripple Current (P-P)
1
I
2
t Inrush Current Transient
Turn On Voltage Threshold
Turn Off Voltage Threshold
All
All
All
All
All
All
All
8.5
3
50
150
0.006
9.8
9.0
9.6
0.012
Module
All
Symbol
Vin
Iin
2.8
2.0
1.5
1.2
1.0
0.8
0.7
0.65
50
10
mA
mA
mA
rms
mApk
A
2
s
V
V
Min
10.8
Typical
Max
13.2
Units
V
A
Note: Input capacitance one 270µF/16V, ESR = 0.018
Ω
max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 2
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 5A
POWER PRODUCTS
BP05xRAH-05A
Output Specifications
Parameter
Output Voltage Set Point
1
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
Load Regulation
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
Line Regulation
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
Regulation Over Temperature
(-40° to 85° C)
3
3
3
2
2
2
1
1
10
10
10
10
10
10
10
10
mV
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
40
40
35
20
15
10
6
5
70
70
70
40
30
20
12
10
mV
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
58
51
46
27
22
17
12
10
110
100
100
65
45
45
37
35
15
8
8
5
5
5
5
4
30
20
20
15
15
15
15
15
mV
Module
Symbol
Vout
4.9
3.247
2.460
1.771
1.476
1.181
0.984
0.886
5
3.3
2.5
1.8
1.5
1.2
1.0
0.9
5.1
3.353
2.540
1.829
1.524
1.219
1.016
0.914
mV
Min
Typical
Max
Units
V
Total Output Voltage Regulation
(-40° to 85° C)
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 12V, Iout = full load, Ta = 25° C.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 3
POWER PRODUCTS
BP05xRAH-05A
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 5A
Output Specifications
Parameter
Output Ripple and Noise
2
Module
Symbol
Min
Typical
Max
Units
mVp-p
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
Output Ripple and Noise
2
70
70
60
50
50
40
30
30
100
100
100
100
80
80
60
60
mVrms
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
Output Current Range
Output DC Current Limit
Shor t Circuit Surge
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
Turn on Time
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.9V
Turn on Time
3
Overshoot at Turn On
Overshoot at Turn On
3
1.2 - 5.0V
0.9V - 1.0V
Output Capacitance
All
Cout
0
0.9V - 5.0V
All
Ton
Ton
All
All
Iout
Ioutlim
Ioutsurge
0
6
30
30
30
20
20
15
15
10
60
60
60
40
40
30
30
20
5
12.5
A
A
A
2
s
0.9
0.60
0.70
0.85
0.85
1.05
1.1
1.1
1.8
1.2
1.4
1.7
1.7
2.1
2.2
2.2
ms
180
130
130
130
130
130
130
130
130
10
0
250
200
200
200
200
200
200
200
200
20
3
ms
%
%
0
3
3
10
2200
µF
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
2. 0 - 20MHz, 22µF/6.3V X5R ceramic cap on output (10µF/10V X5R ceramic cap for 5.0V module).
3. For fast start up modules.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 4
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 5A
POWER PRODUCTS
BP05xRAH-05A
Output Specifications
Parameter
Transient Response
3
Module
Symbol
Min
Typical
Max
Units
∆
V 50% to 100% of Max Load
Settling Time
5.0V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
100
Ts
60
100
Ts
60
150
100
150
100
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
3.3V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
100
Ts
50
100
Ts
50
150
80
150
80
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
2.5V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
100
Ts
50
100
Ts
50
150
80
150
80
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
1.8V
∆
V 100% to 50% of Max Load
Settling Time
Ts
Ts
100
50
100
50
150
80
150
80
mV
µs
mV
µs
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
3. di/dt = 0.5A/uS, Ta = 25° C. 0.9V ~ 3.3V modules with 220µF/6.3V Tant cap (5.0V module with 100µF/10V tant cap).
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
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