SC420IMLTR 데이터 시트보기 (PDF) - Semtech Corporation

부품명

상세내역

일치하는 목록

SC420IMLTR

High Speed, Combi-Sense™, Synchronous Power MOSFET Driver for Mobile Applications

Semtech Corporation 

POWER MANAGEMENT

SC420

High Speed, Combi-SenseTM, Synchronous

Power MOSFET Driver for Mobile Applications

TARGET

POWER MANAGEMENT

Description

Features

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

corporating Semtech’s patented Combi-SenseTM technol-

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.

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.

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

u Low quiescent current

u MLP packaging provides superior thermal perfor-

mance in a small footprint

Conceptual Application Circuit

Applications

u High efficiency portable and notebook computers

u Battery powered applications

VIN2

VIN

VIN

Combi-SenseTM PWM

FB Controller IC

EN

GND CS- CS+

D1

VIN2

VIN

TG

CO

BST

SC420

EN

DRN

CDELAY

BG

VPN

CDELAY

RVPN

CVPN

M1

CBST

L1

M2

VOUT

CL

Rev 4. December 2003

Figure 1

1

United States Patent No. 6,441,597

www.semtech.com

Share Link: