RT8288A

®

DS8288A-03

June 2012

www.richtek.com

1

©

Copyright

2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Pin Configurations

(TOP VIEW)

4A, 21V 500kHz Synchronous Step-Down Converter

General Description

The RT8288A 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 internal soft-start

minimizes external parts count and internal compensation

circuitry.

The RT8288A requires a minimal number of readily

available external components, providing a compact

solution.

Features

4A Output Current

Internal Soft-Start

120m

Ω

Ω

Ω

Ω

Ω/40mΩ

Ω

Ω

Ω

Ω Internal Power MOSFET Switch

Internal Compensation Minimizes External Parts

Count

Fixed 500kHz Frequency

Thermal Shutdown Protection

Cycle-by-Cycle Over Current Protection

Wide 4.5V to 21V Operating Input Range

Adjustable Output from 0.808V to 15V

Available in an SOP-8 (Exposed Pad) Package

RoHS Compliant and Halogen Free

Ordering Information

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.

SOP-8 (Exposed Pad)

Marking Information

Applications

Distributive Power Systems

Battery Charger

DSL Modems

Pre-Regulator for Linear Regulators

RT8288AZSP : Product Number

YMDNN : Date Code

VIN

SW

SW

BOOT

GND

VCC

EN

FB

GND

2

3

4

5

6

7

8

9

RT8288A

ZSPYMDNN

Package Type

SP : SOP-8 (Exposed Pad-Option 2)

RT8288A

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)