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SC1211STR

更新时间： 2024-11-19 04:05:35

品牌	Logo	应用领域
商升特 - SEMTECH		驱动器
页数	文件大小	规格书
11页	271K
描述
High Speed, Combi-SenseTM Synchronous MOSFET Driver

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SC1211STR 数据手册

SC1211

High Speed, Combi-Sense^TM

Synchronous MOSFET Driver

POWER MANAGEMENT

Features

Description

The SC1211 is a high speed, Combi-Sense^TM, dual out- u High efficiency

put driver designed to drive high-side and low-side

MOSFETs in a synchronous Buck converter. These

drivers combined with Combi-Sense PWM controllers,

such as Semtech SC2643VX or SC2643, provide a

cost effective multi-phase voltage regulator for advanced

microprocessors

u +12V supply voltage with internal LDO for optimum

gate drive

u High peak drive current

u Adaptive non-overlapping gate drives provide

shoot-through protection

u Support Combi-Sense^TMand VID-on-fly operations

u Fast rise and fall times (15ns typical with 3000pf

load)

u Ultra-low (<30ns) propagation delay (BG going low)

u Floating top gate drive

u Crowbar function for over voltage protection

u High frequency (to 1.5 MHz) operation allows use

of small inductors and low cost ceramic capacitors

u Under-voltage-lockout

The Combi-Sense^TMis a technique to sense the inductor

current for peak current mode control of voltage regula-

tor without using sensing resistor. It provides the follow-

ing advantages:

- No costly precision sensing resistor

- Lossless current sensing

- High level noise free signal

- Fast response

- Suitable for wide range of duty cycle

- Only two small signal components (third optional)

The detailed explanation of the technique can be found

in the Applications Information section.

u Low quiescent current

Applications

A 30ns max propagation delay from input transition to

the gate of the power FET’s guarantees operation at high

u Intel Pentium^TMprocessor power supplies

switching frequencies. Internal overlap protection circuit u AMD Athlon^TMand K8^TMprocessor power supplies

prevents shoot-through from Vin to PGND in the main

and synchronous MOSFETs. The adaptive overlap pro-

tection circuit ensures the bottom FET does not turn on

until the top FET source has reached 1V, to prevent cross-

conduction.

u High current low voltage DC-DC converters

8.5V gate drive provides optimum enhancement of

MOSFETs at minimum driver and MOSFET switching loss.

High current drive capability allows fast switching, thus

reducing switching losses at high (up to 1.5MHz) frequen-

cies without causing thermal stress on the driver.

Under-voltage-lockout and over-temperature shutdown

features are included for proper and safe operation.

Timed latches and improved robustness are built into

the housekeeping functions such as the Under Voltage

Lockout and adaptive Shoot-through protection circuitry

to prevent false triggering and to assure safe operation.

The SC1211 is offered in a Power SOIC-8L package.

February 24, 2003

www.semtech.com

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与SC1211STR相关器件

型号	品牌	获取价格	描述	数据表
SC1211VX	SEMTECH	获取价格	High Speed, Combi-Sense㈢, Synchronous MOSFET
SC1211VXSTR	SEMTECH	获取价格	High Speed, Combi-Sense㈢, Synchronous MOSFET
SC1211VXSTRT	SEMTECH	获取价格	High Speed, Combi-Sense㈢, Synchronous MOSFET
SC-1211W	NIDEC	获取价格	ROTARY CODED SWITCHES
SC1214	SEMTECH	获取价格	High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver
SC1214TSTR	SEMTECH	获取价格	High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver
SC1214TSTRT	SEMTECH	获取价格	High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver
SC-12-15J	NEC	获取价格	AC Line FIlters
SC-12-15JH	NEC	获取价格	AC Line FIlters
SC1218	SEMTECH	获取价格	High Speed Synchronous MOSFET Driver

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