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SC1211VX

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	295K
描述
High Speed, Combi-Sense㈢, Synchronous MOSFET Driver for Mobile Applications

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SC1211VX 数据手册

SC1211VX

High Speed, Combi-Sense®, Synchronous

MOSFET Driver for Mobile Applications

POWER MANAGEMENT

Features

Description

The SC1211VX is a high speed, Combi-Sense®, dual out- ꢀ 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.

ꢀ High peak drive current

ꢀ Adaptive non-overlapping gate drives provide

shoot-through protection

ꢀ Support Combi-Sense® and VID-on-fly operations

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

load)

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

ꢀ Floating top gate drive

ꢀ Crowbar function for over voltage protection

ꢀ High frequency (to 1.5 MHz) operation allows use

of small inductors and low cost ceramic capacitors

ꢀ Under-voltage-lockout

The Combi-Sense® is 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

ꢀ Low quiescent current

- High level noise free signal

- Fast response

ꢀ Power SOIC-8L package, fully RoHS and WEEE

compliant

- 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.

Applications

A 30ns max propagation delay from input transition to

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

ꢀ Intel Pentium® processor power supplies

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

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.

supplies

ꢀ High efficiency portable and notebook computers

ꢀ Battery powered applications

ꢀ High current low voltage DC-DC converters

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 SC1211VX is offered in a Power SOIC-8L package.

www.semtech.com

October 12, 2005

12 3 4 5 6 7...11

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与SC1211VX相关器件

型号	品牌	获取价格	描述	数据表
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
SC1218MLTRT	SEMTECH	获取价格	High Speed Synchronous MOSFET Driver

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