RT9259APS RICHTEK [Richtek Technology Corporation], RT9259APS Datasheet

RT9259APS

Manufacturer Part Number

RT9259APS

Description

12V Synchronous Buck PWM DC-DC and Linear Power Controller

Manufacturer

RICHTEK [Richtek Technology Corporation]

Datasheet

1.RT9259APS.pdf (14 pages)

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12V Synchronous Buck PWM DC-DC and Linear Power

Controller

General Description

The RT9259A is a dual-channel DC/DC controller

specifically designed to deliver high quality power where

12V power source is available. This part consists of a

synchronous buck controller and an LDO controller. The

synchronous buck controller integrates MOSFET drivers

that support 12V+12V bootstrapped voltage for high

efficiency power conversion. The bootstrap diode is built-

in to simplify the circuit design and minimize external part

count. The LDO controller drives an external N-MOSFET

for lower power requirement.

Other features include adjustable operation frequency,

internal soft start, under voltage protection, over current

protection and shut down function. With the above

functions, this part provides customers a compact, high

efficiency, well-protected and cost-effective solution. This

part comes to SOP-14 package.

Ordering Information

Note :

RichTek Pb-free and Green products are :

DS9259A-02 March 2007

RT9259A

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.

Package Type

S : SOP-14

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

Features

Applications

Pin Configurations

Single 12V Bias Supply

Support Dual Channel Power Conversion

Both Controllers Drive Low Cost N-Channel

MOSFETs

Adjustable Frequency from 150kHz to 1MHz

and Free-Run Frequency at 230kHz

Small External Component Count

Output Voltage Regulation

Two Internal V

Adjustable External Compensation

Linear Controller Drives N-Channel MOSFET Pass

Transistor

Fully-Adjustable Outputs

Under Voltage Protection for Both Outputs

Adjustable Over Current Protection

RoHS Compliant and 100% Lead (Pb)-Free

Graphic Card GPU, Memory Core Power

Graphic Card Interface Power

Motherboard, Desktop and Servers Chipset and Memory

Core Power

IA Equipments

Telecomm Equipments

High Power DC-DC Regulators

One Synchronous Rectified Buck PWM Controller

One Linear Controller

PWM Controller : ± ± ± ± ± 1% Accuracy

LDO Controller : ± ± ± ± ± 2% Accuracy

RT_DIS

COMP

BOOT

GND

DRV

FBL

REF

Power Support Lower to 0.8V

(TOP VIEW)

SOP-14

RT9259A

UGATE

PHASE

PGND

LGATE

OCSET

VREF

VCC12

www.richtek.com

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