NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
SRAH-07C / VRAH-07C 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
Industrial temperature range -40° to +85° C
POWER PRODUCTS
BP06xRAH-07C
RoHS Compliant
Description
The Bel SRAH-07C and VRAH-07C modules are a series of non-isolated, step down DC/DC power converters that operate
from a nominal 3.3V source. These converters are available in a range of output voltages from 0.9V to 2.5V. They are pack-
aged in a compact, overmolded package rated at 7A. 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, and output voltage adjust. These products may be used almost anywhere low voltage silicon is employed and a
3.3V 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
Options
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Wide range adjustable output
Part Number Selection
Output
Voltage
2.5V
1.8V
1.5V
1.2V
0.9V
0.9V - 2.5V
Input
Voltage
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
Max. Output
Current
7A
7A
7A
7A
7A
7A
Max. Output
Power
17.5W
12.6W
10.5W
8.4W
6.3W
17.5W
Typical
Efficiency
92%
88%
86%
83%
80%
92%
Part Number
Surface Mount
SRAH-07C250
SRAH-07C180
SRAH-07C150
SRAH-07C120
SRAH-07C090
SRAH-07C1A0
©2006 Bel Fuse Inc.
Part Number
Vertical Mount
VRAH-07C250
VRAH-07C180
VRAH-07C150
VRAH-07C120
VRAH-07C090
VRAH-07C1A0
Specifications subject to change without notice. 02.06
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
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
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
6
6
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
2.5V
1.8V
1.5V
1.2V
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
2.5
2.4
All
7
50
150
0.08
Module
All
Symbol
Vin
Iin
6.6
5.3
4.6
3.8
3.0
110
15
80
250
0.16
2.8
mA
mA
mA
rms
mApk
A
2
s
V
V
Min
3
Typical
Max
3.6
Units
V
A
Note: Input capacitance 270µF/16V, ESR = 0.03
Ω
max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
3.3V Input / 0.9V – 2.5V Output / 7A
Output Specifications
Parameter
Output Voltage Set Point
1
2.5V
1.8V
1.5V
1.2V
0.9V
Load Regulation
2.5V
1.8V
1.5V
1.2V
0.9V
Line Regulation
2.5V
1.8V
1.5V
1.2V
0.9V
Regulation Over Temperature
(-40° to +85° C)
3
3
3
1
1
10
10
10
5
5
3
3
3
1
1
10
10
10
5
5
Module
Symbol
Vout
2.450
1.764
1.470
1.176
0.882
2.500
1.800
1.500
1.200
0.900
2.550
1.836
1.530
1.224
0.918
Min
Typical
Max
POWER PRODUCTS
BP06xRAH-07C
Units
V
mV
mV
mV
2.5V
1.8V
1.5V
1.2V
0.9V
20
15
15
10
8
40
30
30
20
15
mV
2.5V
1.8V
1.5V
1.2V
0.9V
26
21
21
12
10
60
50
50
30
25
mVp-p
2.5V
1.8V
1.5V
1.2V
0.9V
40
40
40
40
40
10
Iout
Ioutlim
Ioutsurge
Ton
0
8.4
0.08
7
0
Cout
0
80
80
80
80
70
20
7
16
0.12
15
1
2200
mVrms
A
A
A
2
s
ms
%
µF
Total Output Voltage Regulation
Output Ripple and Noise
2
Output Ripple and Noise
2
Output Current Range
Output DC Current Limit
Shor t Circuit Surge
Turn on Time
Overshoot at Turn On
Output Capacitance
All
All
All
All
All
All
All
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 3.3V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 1µF ceramic cap and 10µF aluminum cap on output.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
Output Specifications
Parameter
Transient Response
3
Module
Symbol
Min
Typical
Max
Units
∆
V 50% to 100% of Max Load
Settling Time
2.5V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
120
Ts
40
120
Ts
40
180
80
180
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
Transient Response
3
120
Ts
40
120
Ts
40
180
80
180
80
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
1.5V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
100
Ts
40
100
Ts
40
150
80
150
80
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
1.2V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
50
Ts
40
50
Ts
40
100
80
100
80
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
0.9V
∆
V 100% to 50% of Max Load
Settling Time
Ts
Ts
50
40
50
40
100
80
100
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/1µS, Ta = 25° C without external load capacitance.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
3.3V Input / 0.9V – 2.5V Output / 7A
POWER PRODUCTS
BP06xRAH-07C
General Specifications
Parameter
Efficiency
1
2.5V
1.8V
1.5V
1.2V
0.9V
Switching Frequency
Output Voltage Trim Range
2
Weight
All
1.8V
All
Fsw
Module
Symbol
η
90
86
84
81
78
250
50
5
92
88
86
83
80
300
340
146
kHz
%
g
Min
Typical
Max
Units
%
1. Vin=3.3V, full load and Ta=25° C.
2. See graphs on page 9.
Control Specifications
Parameter
Remote On/Off
3
Signal Low (Unit Off)
Signal High (Unit On)
Module
All
All
All
Symbol
Vouten
-0.3
1.8
1
3.6
Min
Typical
Max
Units
V
V
V
3. With remote on/off pin 1 open, the module is on.
Note: On/off pin designed to work with an open collector/drain switch.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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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