RT9218PS RICHTEK [Richtek Technology Corporation], RT9218PS Datasheet

RT9218PS

Manufacturer Part Number

RT9218PS

Description

5V/12V Synchronous Buck PWM DC-DC and Linear Power Controller

Manufacturer

RICHTEK [Richtek Technology Corporation]

Datasheet

1.RT9218PS.pdf (18 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

RT9218PS

Manufacturer:

RICHTEK/立锜

Quantity:

20 000

Company:

H&T Electronics

Part Number:

RT9218PS

Quantity:

2 100

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5V/12V Synchronous Buck PWM DC-DC and Linear Power

Controller

General Description

The RT9218 is a dual output with one synchronous buck

PWM and one linear controller. The part is proposed to

generate logic-supply voltages for PC based systems. The

high-performance device includes internal soft-start,

frequency-compensation networks, power good signaling

with specific sequence, and it comes all of the logic control,

output adjustment, power monitoring and protection

functions into a small footprint package. The part is

operated at fixed 300kHz frequeny providing an optimum

compromise between efficiency, external component size,

and cost. The linear controller is implemented to drive an

external MOSFET for regulation and it's adjustable by

setting external resistors. Moreover the specific internal

PGOOD sequence and indicator is also implemented to

conform to Intel

power plane. An adjustable over-current protection (OCP)

is proposed to monitor the voltage drop across the

RDS(ON) of the lower MOSFET for synchronous buck

PWM DC-DC controller.

Ordering Information

Note :

RichTek Pb-free and Green products are :

DS9218-08 March 2007

RT9218

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-

new platform requirement on FSB_VTT

cial Standard)

Features

Applications

Pin Configurations

Operating with 5V or 12V Supply Voltage

Drives All Low Cost N-MOSFETs

Voltage Mode PWM Control

300kHz Fixed Frequency Oscillator

Fast Transient Response :

Internal Soft-Start

Power Good Indicator

Adaptive Non-Overlapping Gate Driver

Over-Current Fault Monitor on MOSFET, No Current

Sense Resistor Required

Specific power good indicator for Intel®

Grantsdale FSB_VTT power sequence

RoHS Compliant and 100% Lead (Pb)-Free

Graphic Card

Motherboard, Desktop Servers

IA Equipments

Telecomm Equipments

High Power DC-DC Regulators

High-Speed GM Amplifier

Full 0 to 100% Duty Ration

UGATE

LGATE

BOOT

GND

DRV

(TOP VIEW)

SOP-14

PHASE

OPS

VCC

PGOOD

FBL

RT9218

www.richtek.com

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