SC420

更新时间： 2024-09-26 04:05:23

品牌	Logo	应用领域
商升特 - SEMTECH		驱动器
页数	文件大小	规格书
12页	269K
描述
High Speed, Combi-SenseTM, Synchronous Power MOSFET Driver for Mobile Applications

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SC420 数据手册

SC420

High Speed, Combi-Sense^TM, Synchronous

Power MOSFET Driver for MobileApplications

POWER MANAGEMENT

Description

TARGET

Features

u High efficiency

u Shutdown mode for increased power saving

u Tri-state capability

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

load)

u 5V gate drive

u Ultra-low (<20ns) propagation delay (BG going low)

u Adaptive and programmable non-overlapping gate

drives provide shoot-through protection

u Floating top drive switches up to 27V

u High frequency (to 1.5 MHz) operation allows use

of small inductors and low cost ceramic capacitors

u Under-voltage lockout

The SC420 is a cost effective Dual MOSFET Driver, in-

corporating Semtech’s patented Combi-Sense^TMtechnol-

ogy, designed for switching High and Low side Power

MOSFETs in Step-down Switching regulators. A 20ns max

propagation delay from input transition to the gate of

the power FET’s guarantees operation at high switching

frequencies. Internal overlap protection circuit prevents

shoot-through from Vin to GND in the main and synchro-

nous MOSFETs.

High current drive capability (2A peak) allows fast

switching, thus reducing switching losses at high (up to

1.5MHz) frequencies without causing thermal stress on

the driver.

u Low quiescent current

u MLP packaging provides superior thermal perfor-

mance in a small footprint

The high voltage CMOS process allows operation up to

27 Volts, making the SC420 suitable for adaptor pow-

ered applications. Under-voltage-lockout and over-tem-

perature shutdown features are included for proper and

safe operation. The SC420 is offered in a space saving

MLP-12 package.

Applications

u High efficiency portable and notebook computers

u Battery powered applications

Conceptual Application Circuit

VIN2

VIN

VIN2

VIN

Combi-Sense^TM

Controller IC

PWM

BST

CBST

VOUT

SC420

DRN

GND

CS- CS+

CDELAY

VPN

RVPN

CVPN

Figure 1

Rev 4. December 2003

United States Patent No. 6,441,597

www.semtech.com

12 3 4 5 6 7...12

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