rt9232a Richtek Technology Corporation, rt9232a Datasheet

rt9232a

Manufacturer Part Number

rt9232a

Description

Programmable Frequency Synchronous Buck Controller

Manufacturer

Richtek Technology Corporation

Datasheet

1.RT9232A.pdf (14 pages)

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Programmable Frequency Synchronous Buck PWM Controller

General Description

The RT9232A is a single-phase synchronous buck PWM

DC-DC converter controller designed to drive two N-Channel

MOSFET. It provides a highly accurate, programmable

output voltage precisely regulated to low voltage

requirement with an internal 0.8V ± 1% reference.

The RT9232A uses an external compensated, single

feedback loop voltage mode PWM control for fast transient

response. An oscillator with Programmable frequency

(50kHz to 800kHz) reduces the external inductor and

capacitor component size for saving PCB board area.

The

high current output applications (up to 25A) while

minimizing external components. It is suitable for high-

performance graphic processors, DDR and VTT power.

The RT9232A integrates complete protect functions such

as Soft Start, Output Enable, UVLO(under-voltage lockout)

into a small 14-pin package.

Ordering Information

Note :

RichTek Pb-free and Green products are :

DS9232A-02 March 2007

RT9232A

RoHS compliant and compatible with the current require-

Suitable for use in SnPb or Pb-free soldering processes.

100%matte tin (Sn) plating.

ments of IPC/JEDEC J-STD-020.

RT9232A provides fast transient response to

Package Type

S : SOP-14

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

satisfy

Features

Applications

Pin Configurations

Single IC Supply Voltage : 12V

Single phase DC/DC Buck Converter with

Operate from 12V, 5V or 3.3V Input

0.8V

Adaptive Non-Overlapping Gate Drivers

Integrated High-Current, HV Gate Drivers

External Programmable Soft Start

External Programmable Frequency

(Range : 50kHz to 800kHz, 200kHz Free Run )

Integrated Output Short Circuit Protection

On/Off Control by Enable Pin

Drives Two N-MOSFET

Full 0 to 100% Duty Cycle

Fast Transient Response

Voltage Mode PWM Control with External

Feedback Loop Compensation

RoHS Compliant and 100% Lead (Pb)-Free

System (Graphic, MB) with 12V Power.

Graphic Cards (AGP 8X, 4X, PCI Express*16):

–

3.3V ~ 12V Input DC-DC Regulators

Low Voltage Distributed Power Supplies

High Output Current (up to 25A )

Low Output Voltage (down to 0.8V )

High Input Voltage (up to 12V )

(GPU, VPU)

High-Current for High-Performance Graphic Processors

Middle Current for High-Performance Graphic Memory

Low Current with Sink Capacity for High-Performance

Graphic Memory Power (DDR/VTT)

Power (DDR, DDR II)

1% Internal Reference

SENSE

COMP

GND

(TOP VIEW)

SOP-14

PVCC

UGATE

PHASE

RT9232A

VCC

LGATE

PGND

BOOT

www.richtek.com

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