Datasheet > APW7047

APW7047

更新时间： 2024-09-14 22:14:39

品牌	Logo	应用领域
茂达 - ANPEC		控制器
页数	文件大小	规格书
12页	156K
描述
Dual Advanced PWM and Source-Sink Linear Controller

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APW7047 数据手册

APW7047

Dual Advanced PWM and Source-Sink Linear Controller

Features

General Description

The APW7047 provides the power controls and protec-

tions for three output voltages on AGP/PCI Graphic Card

•

3 Regulated Voltages are provided

− SYNC. Buck Converter for VCORE

(1.15V~1.50V)

applications. It integrates two PWM controllers , one

SOURCE-SINK linear controller, as well as the monitor

and protection functions into a single package. One PWM

converter (PWM1) regulates the VCORE(1.5V) for the GPU

with a SYNC. buck converter. The other standard buck

converter (PWM2) regulates the VMEM(2.5V) for the pow-

er of DDR memory. The SOURCE-SINK linear controller

control two external MOSFETs to be a linear regulator

with the capability of sourcing and sinking current. It reg-

ulates the VTT (1.25V) power for DDR Termination voltage.

− Standard Buck Converter for VMEM

(2.40V~2.75V)

−Linear Controller with SOURCE-SINK

Regulation for VTT(1.25V)

•

Simple Single-Loop Control Design

− Voltage-Mode PWM Control

Excellent Output Voltage Regulation

− VCORE Output : ±2% Over Temperature

− VMEM Output : ±2% Over Temperature

− VTT Output : 1/2 VIN ±25mV Over

Temperature Min. VIN = 1.7V

Fast Transient Response

Additional built-in over-voltage protection (OVP) will be

started when the VCORE or VMEM output is above 115%

of each DAC setting (V^COREand VMEM). OVP function will

shutdown the all output voltages until re-powering on the

IC. For each PWM converter, the over-current function

monitors the output current by sensing the voltage drop

across the MOSFET‘s r_DS(ON), eliminating the need for a

current sensing resistor.

•

− Built-in Feedback Compensation

− Full 0% to 100% Duty Ratio

Over-Voltage and Over-Current Fault Monitor

Constant Frequency Operation(200kHz)

24 pins, SOIC Package

•

Pin Description

UGATE 2

BOOT

VCC

UGATE1

PHASE1

23 UPHGAASTEE22

22 PHASE2

LGATE1

Applications

21 PGND

20 MEM2

19 MEM1

SOURCE

SINK

•

M/B DDR Power Regulation

AGP/PCI Graphics Power Regulation

SSTL-2 Termination

MEM0

CORE2

CORE1

CORE0

OCSET2

VSEN2

VIN

OCSET1

VSEN1

GND

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

ANPEC Electronics Corp.

www.anpec.com.tw

Rev.A.1 - May., 2002

12 3 4 5 6 7...12

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