Datasheet > SC1471

SC1471

更新时间： 2024-02-28 02:22:07

品牌	Logo	应用领域
商升特 - SEMTECH		控制器便携式
页数	文件大小	规格书
1页	49K
描述
Power Supply Controller for Portable Pentium III SpeedStep Processors

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SC1471 技术参数

生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	TSSOP,	针数：	24
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.83
其他特性：	PWM CONTROL TECHNIQUE ALSO POSSIBLE	模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	CURRENT-MODE	控制技术：	HYSTERETIC CURRENT MODE
最大输入电压：	6 V	最小输入电压：	3 V
标称输入电压：	3.3 V	JESD-30 代码：	R-PDSO-G24
长度：	7.8 mm	功能数量：	1
端子数量：	24	最高工作温度：	100 °C
最低工作温度：		封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	认证状态：	Not Qualified
座面最大高度：	1.2 mm	表面贴装：	YES
切换器配置：	PUSH-PULL	温度等级：	OTHER
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	宽度：	4.4 mm
Base Number Matches：	1

SC1471 数据手册

SC1471

Power Supply Controller for Portable

Pentium^®III SpeedStep™ Processors

POWER MANAGEMENT

ꢀeatures

Description

The SC1471 PowerStep II controller is a high speed,

high performance hysteretic mode PWM controller.

Teamed with the SC1405 Smart Driver , it powers ad-

vanced Intel^®Pentium^®III processors. The SC1471 fea-

tures extended Intel Mobile Voltage Positioning (IMVP) to

increase battery life by reducing the voltage at the pro-

cessor when it is heavily loaded. It directly supports Intel^®

SpeedStep processors for even longer battery life, in-

cluding IMVP extensions. The SC1471 incorporates di-

rect deeper sleep mode support, which eliminates an

external multiplexer in many applications.

u Direct deeper sleep mode support

u High-speed hysteretic controller provides high

efficiency over a wide operating load range

u ꢀastest possible transient response

u Inherently stable

u Integrated extended IMVP support

u Programmable core voltage for Pentium^®III proces-

sors

u Native Intel^®SpeedStep™ support with PWRGD

blanking

u Proportional overvoltage protection

u Overcurrent shutdown after 32 overcurrent pulses

u SC1471A also available for VID controlled Deeper

Sleep mode

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

reference and implements the 0.600V to 1.750V range

required by the processor. The hysteretic converter uses

a comparator without an error amplifier, and therefore

provides the fastest possible transient response, while

avoiding the stability issues inherent to classical PWM

controllers.

Applications

u Laptop and notebook computers

u High performance microprocessor-based systems

u High efficiency distributed power supplies

The SC1471 operates from either 3.3Vdc or 5Vdc Vcc

and also features soft-start, an open-drain power-good

indication with power-good blanking, and an enable in-

put. Programmable current limiting uses a separate com-

parator to protect against overloads and short-circuits.

In addition, it comes in a space-saving TSSOP-24 pack-

age.

Typical Application Circuit

+V_5

+V_IN

SC1405C

Smart

+VCC_CPU_CORE

MOSFET

Driver

PWM

Controller

0.600V-1.75V

Up to 25A

Power

Control

Signals

SC1471

Extended IMVP

CONTROLLER

VID [4:0]

Extended

IMVP

Logic

Control

Signals

www.semtech.com

Revision 2, March 2001

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与SC1471相关器件

型号	品牌	描述	获取价格	数据表
SC-1471	ETC	CRYSTAL CLOCK OSCILLATORS	获取价格
SC1471TSTR	SEMTECH	Switching Controller, Current-mode, PDSO24, MO-153AD, TSSOP-24	获取价格
SC1474	SEMTECH	Portable Pentium Dual Phase Power Supply Controller	获取价格
SC1474TSTR	SEMTECH	Switching Controller, PDSO38, MO-153BD-1, TSSOP-38	获取价格
SC1474TSTRT	SAMTEC	Portable PentiumÂ® Dual Phase Power Supply Co	获取价格
SC1476	SEMTECH	Portable IMVP-IV Dual Phase Power Supply Controller	获取价格

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