UM5482S8 Datasheet, PDF (1/6 Pages) Union Semiconductor, Inc. – Programmable Soft-Start

UM5482S8 Initial Spec
4.75V to 18V Input, 2A Synchronous Step Down
DC/DC Converter
UM5482S8 SOP8
General Description
The UM5482S8 is a synchronous buck regulator. The device integrates two 130mΩ MOSFETs,
and provides 2A of continuous load current over a wide input voltage of 4.75V to 18V. Current
mode control provides fast transient response and cycle-by-cycle current limit.
An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply
current drops to 1μA.
This device, available in an 8-pin SOP package, provides a very compact solution with minimal
external components.
Applications
Features
 Distributed Power Systems
 Networking Systems
 FPGA, DSP, ASIC Power Supplies
 Green Electronics/Appliances
 Notebook Computers
 2A Output Current
 Wide 4.75V to 18V Operating Input Range
 Integrated 130mΩ Power MOSFET Switches
 Output Adjustable from 0.923V to 15V
 Up to 93% Efficiency
 Programmable Soft-Start
 Stable with Low ESR Ceramic Output
Capacitors
 Fixed 340kHz Frequency
 Cycle-by-Cycle Over Current Protection
 Input Under Voltage Lockout
 SOP8 Package
Pin Configurations
Top View
Ordering Information
Part Number
UM5482S8
Packaging Type
SOP8
UM5482
S8
XX
XX: Week Code
UM5482S8
SOP8
Marking Code
UM5482S8
Shipping Qty
2500pcs/13Inch
Tape & Reel
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http://www.union-ic.com Rev.03 Sep.2016
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