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NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 5A
S7AH-05C / V7AH-05C Series
• 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
BP02x7AH-05C
Description
The Bel S7AH-05C and V7AH-05C 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 1.2V to 2.5V. They are pack-
aged 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, 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
• Distributed power architectures
• Data networking equipment
• Telecommunications
• Computers and peripherals
Part Number Selection
Output
Voltage
2.5V
1.8V
1.5V
1.2V
Input
Voltage
3.3V
3.3V
3.3V
3.3V
Max. Output
Current
5A
5A
5A
5A
Max. Output
Power
12.5W
9.0W
7.5W
6W
Typical
Efficiency
91%
88%
86%
83%
Part Number
Surface Mount
S7AH-05C250
S7AH-05C180
S7AH-05C150
S7AH-05C120
Part Number
Vertical Mount
V7AH-05C250
V7AH-05C180
V7AH-05C150
V7AH-05C120
©2002 Bel Fuse Inc. Specifications subject to change without notice. 11.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1
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POWER PRODUCTS
BP02x7AH-05C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 5A
Absolute Maximum Ratings
Parameter
Symbol Min Typical Max
Continuous Input Voltage
Vin -0.3
6
Output Enable Terminal Voltage
Vouten
-0.3
6
Ambient Temperature
Tamb
-40
85
Storage Temperature
Tstor
-40
105
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
Module Symbol Min Typical
Operating Input Voltage
Input Current
No Load Input Current
Remote Off Input Current
Input Reflected Ripple Current1
Input Reflected Ripple Current (P-P)1
I2t Inrush Current Transient
Turn On Voltage Threshold
Turn Off Voltage Threshold
All
2.5V
1.8V
1.5V
1.2V
All
All
All
All
All
All
Vin
Iin
3
3
30
100
0.0005
2.6
2.5
Note: Input capacitance 270µF/16V, ESR = 0.03 Ω max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
Max
3.6
4.8
4.0
3.5
3.0
90
10
45
150
0.001
2.7
Units
V
A
mA
mA
mArms
mApk
A2s
V
V
©2002 Bel Fuse Inc. Specifications subject to change without notice. 11.02
page 2
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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