RT8287A Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 4A, 21V 500kHz Synchronous Step-Down Converter

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RT8287A
4A, 21V 500kHz Synchronous Step-Down Converter
General Description
The RT8287A is a synchronous step-down regulator with
an internal power MOSFET. It achieves 4A of continuous
output current over a wide input supply range with excellent
load and line regulation. Current mode operation provides
fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current
limiting and thermal shutdown. An adjustable soft-start
reduces the stress on the input source at startup.
The RT8287A requires a minimal number of readily
available external components, providing a compact
solution.
Ordering Information
RT8287A
Package Type
QW : WDFN-14L 4x3 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
01 : Product Code
01 YM
DNN
YMDNN : Date Code
Features
z 4A Output Current
z Adjustable Soft-Start
z 120mΩ/40mΩ Internal Power MOSFET Switch
z Internal Compensation Minimizes External Parts
Count
z Fixed 500kHz Frequency
z Thermal Shutdown Protection
z Cycle-by-Cycle Over Current Protection
z Wide 4.5V to 21V Operating Input Range
z Adjustable Output from 0.808V to 15V
z Small 14-Lead WDFN Package
z RoHS Compliant and Halogen Free
Applications
z Distributive Power Systems
z Battery Charger
z DSL Modems
z Pre-Regulator for Linear Regulators
Pin Configurations
(TOP VIEW)
VIN 1
SW 2
SW 3
SW ⁴
SW 5
BOOT 6
EN 7
GND
15
14 _AGND
13 _GND
12 GND
11 VCC
10 SS
9 PGOOD
8 FB
WDFN-14L 4x3
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8287A-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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