sc472bmltrl Semtech Corporation, sc472bmltrl Datasheet

sc472bmltrl

Manufacturer Part Number

sc472bmltrl

Description

Sc472b Single-phase Single Chip Graphics Core Power Supply

Manufacturer

Semtech Corporation

Datasheet

1.SC472BMLTRL.pdf (1 pages)

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The SC472B is a single-phase chip, high-performance

PWM controller designed to power advanced graphic cores.

On-chip support is provided for all of the Intel® integrated

requirements, including Active Voltage Positioning, Slew-

rate controlled VID transitions, and VID-Controlled Sleep

voltage settings.

The SC472B implements hysteretic control technology

which provides the fastest possible transient response

while avoiding the stability issues inherent to classical PWM

controllers. Eliminating the sense resistors reduces costs

and PCB area, plus increases system efficiency. Integrated

SmartDriver™ technology initially turns on the high-side

driver with ‘soft’ drive to reduce ringing, EMI, and capaci-

tive turn-on of the low side MOSFET, while also increasing

overall efficiency.

Hysteretic operation adaptively reduces the SC472B

switching frequency at light loads. Combined with an auto-

matic “powersave” mode which prevents negative current

flow in the low-side FET, system efficiency is significantly

enhanced during light loading conditions.

A 5-bit DAC, accurate to 0.85%, sets the output voltage

reference, and implements the voltage range required by

the processor. The DAC slew rate is externally programmed

to minimize transient currents and audible noise. True

differential remote sensing provides accurate point-of-load

regulation at the processor die. Other features include

programmable soft-start, an open-drain PWRGD output,

dual-level over-voltage and programmable over-current

protection. The SC472B is available in a space-saving

4x4mm, 24-pin MLP package.

Updated - Apr 0, 2007

POWER MANAGEMENT

Description

Features

Applications



Single-Phase Solution with Integrated Drivers

Hysteretic Control for Fast Transient Response

Active Voltage Positioning

True Differential Remote (die) Sensing

On-Chip Support for all IMVP-6+ Graphics

Power Management Features

VID Programmed Deeper Sleep Voltage

Delayed Power Good Signal with Blanking

Programmable Soft-Start and DAC Slew Control

Programmable OCP Threshold

Supports all Ceramic Decoupling Solutions

24-Pin MLP (4x4)

Lead-Free Package. This product is fully WEEE and

RoHS compliant.

IMVP-6+ Notebook Graphic Cores

Embedded Applications

Graphics Core Power Supply

Single-Phase Single Chip

www.semtech.com

SC472B

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