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SC453MLTRT

更新时间： 2024-11-23 09:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
26页	338K
描述
Portable, VID Programmed Single Phase Power Supply Controller

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SC453MLTRT 数据手册

SC453

Portable, VID Programmed Single

Phase Power Supply Controller

POWER MANAGEMENT

Description

Features

ꢀ High Speed Hysteretic Controller

ꢀ Single Phase Operation

The SC453 IC is a single chip high-performance Hysteretic

PWM controller. With its integrated SmartDrive™ it pow-

ers advanced graphics and core processors. It provides

sleep mode and boot voltage support. Automatic power-

save is present to prevent negative current flow in the low-

side FET during light loading conditions saving even more

power. The high side driver initially turns on with a weak

drive to reduce ringing, EMI, and capacitive turn-on of the

low side.

ꢀ Selectable Analog or VID Controlled Sleep Setting

ꢀ

6 Bit VID programmable Output

Integrated Drivers with SmartDrive™

Programmable Soft-Start

Programmable Boot Voltage

Programmable Sleep Voltage with Sleep Mode

Under-Voltage Lockout on V_CCAand V₅

Over-voltage Protection on V_CORE

Current Limit Protection on V_CORE

Thermal Protection

Power Good Flag with Blanking During

V_COREChanges

A 6-bit DAC (accurate to 0.85%) sets the output voltage

reference and implements the 0.700V to 1.708V range

required by the processor. The hysteretic converter uses

a comparator without an error amplifier to provide fast

transient response while avoiding the stability issues in-

herent to classical PWM controllers. The DAC is externally

slew rate limited to minimize transient currents and au-

dible noise.

ꢀ

Automatic Power Save at Light Load

Package Types — TSSOP-28, MLPQ-32

The SC453 operates from a 5V supply and also features

soft-start, an open-drain power good signal with V_COREtran-

sition blanking, and an enable input. Programmable cur-

rent limiting shuts down the SC453 after 32 current limit

pulses.

Applications

ꢀ

Low Power Notebook and Laptop Computers

Embedded Applications

ꢀ

PowerStep IV™ and Smart Driver™ are trademarks

of Semtech Corporation.

Typical Application Circuit

VIN

V₅

V_CCA

VCORE

0.700V – 1.708V

Smart

Driver

SC453 Single Phase

Power Supply

PWM

Controller

VID Logic

and DAC

VID (5:0)

www.semtech.com

June 22, 2009

12 3 4 5 6 7...26

中文翻译

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与SC453MLTRT相关器件

型号	品牌	获取价格	描述	数据表
SC453TSTRT	SEMTECH	获取价格	Portable, VID Programmed Single Phase Power Supply Controller
SC454	SEMTECH	获取价格	Single-Phase Single Chip IMVP-6/6+ Vcore Power Supply
SC454_09	SEMTECH	获取价格	Single-Phase Single Chip IMVP-6/6+ Vcore Power Supply
SC4540	SEMTECH	获取价格	High Effi ciency Boost Converter for up to 10 LEDs
SC4540EVB	SEMTECH	获取价格	High Effi ciency Boost Converter for up to 10 LEDs
SC4540ULTRT	SEMTECH	获取价格	High Effi ciency Boost Converter for up to 10 LEDs
SC4541	SEMTECH	获取价格	High Frequency LED Driver with Integrated Schottky and Simple Interconnect
SC4541EVB-1	SEMTECH	获取价格	High Frequency LED Driver with Integrated Schottky and Simple Interconnect
SC4541EVB-2	SEMTECH	获取价格	High Frequency LED Driver with Integrated Schottky and Simple Interconnect
SC4541SKTRT	SEMTECH	获取价格	High Frequency LED Driver with Integrated Schottky and Simple Interconnect

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