SRAH-07C250R Bel Fuse Inc, SRAH-07C250R Datasheet

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SRAH-07C250R

Manufacturer Part Number
SRAH-07C250R
Description
CONV DC/DC 7A 3.3V 2.5V OUT SMD
Manufacturer
Bel Fuse Inc
Series
SRAH-07Cr
Type
Point of Load (POL) Non-Isolated with Remote On/Off and UVLOr
Datasheet
1.SRAH-07C1A00.pdf (14 pages)

Specifications of SRAH-07C250R

Output
2.5V
Number Of Outputs
1
Power (watts)
18W
Mounting Type
Surface Mount
Voltage - Input
3.3V
Package / Case
7-DIP SMD Module
1st Output
2.5 VDC @ 7A
Size / Dimension
0.78" L x 0.70" W x 0.32" H (19.8mm x 17.8mm x 8.1mm)
Power (watts) - Rated
17.5W
Operating Temperature
-40°C ~ 85°C
Efficiency
92%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
3rd Output
-
2nd Output
-
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
•
•
•
•
Part Number Selection
0
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Distributed power architectures
Data networking equipment
Telecommunications
Computers and peripherals
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NON-ISOLATED DC/DC CONVERTERS
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3.3V Input / 0.9V – 2.5V Output / 7A
SRAH-07C / VRAH-07C Series
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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
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Wide range adjustable output
©2006 Bel Fuse Inc.
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Specifications subject to change without notice. 02.06
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POWER PRODUCTS
t n
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BP06xRAH-07C
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page 1

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SRAH-07C250R Summary of contents

Page 1

... Industrial temperature range -40° to +85° C 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 ...

Page 2

... 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 ...

Page 3

... Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 1. Vin = 3.3V, Iout = full load 25° 20MHz, 1µF ceramic cap and 10µF aluminum cap on output. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com d u ...

Page 4

... 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 ...

Page 5

... Vin=3.3V, full load and Ta=25° See graphs on page 9. Control Specifications With remote on/off pin 1 open, the module is on. Note: On/off pin designed to work with an open collector/drain switch. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ...

Page 6

... OUTPUT CURRENT ©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 6 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 0.9V – 2.5V Output / 7A ...

Page 7

... Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=1.8V 50% to 100% load transients at 3.3V input and Ta=25° C Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com POWER PRODUCTS Vout=1.8V 100% to 50% load transients at 3.3V input and Ta=25° C © ...

Page 8

... Thermal Considerations ©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 8 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 0.9V – 2.5V Output / 7A SRAH-07C VRAH-07C ...

Page 9

... Rtrim down = – 13.83 Vo – Vo, adj 3.064 ( Rtrim up = – 10 Vo, adj – Vo Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com Trim Up Test Circuit Vo Trim Gnd ) Kohm ) Kohm ©2006 Bel Fuse Inc. ...

Page 10

... Vo, adj – Vo ©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 10 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 0.9V – 2.5V Output / 7A ...

Page 11

... Rtrim up = Vo, adj – Vo xRAH-07C090 Trim Resistor Calculation 0.3064 ( – 0.178 Rtrim up = Vo, adj – Vo Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ) Kohm ) Kohm ) Kohm ©2006 Bel Fuse Inc. POWER PRODUCTS BP06xRAH-07C Specifications subject to change without notice ...

Page 12

... Rtrim up = – 0.261 Vo, adj – Vo Note: Default output voltage of SRAH-07C1A0 is 1.8V ©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 12 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 0.9V – ...

Page 13

... NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 0.9V – 2.5V Output / 7A Mechanical SRAH-07C 0.400 [10.16] 0.60 [15.24] 0.70 [17.78] 0.050 [1.27] 0.100 [2.54] 0.400 [10.16] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com Suggested PCB Pad Layout 0 ...

Page 14

... ©2006 Bel Fuse Inc. FAR EAST Bel Fuse Ltd Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Specifications subject to change without notice. 02.06 EUROPE Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U ...

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