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SC420A

Semtech Corporation
Part Number SC420A
Manufacturer Semtech Corporation
Description Synchronous Power MOSFET Driver
Published Nov 17, 2008
Detailed Description SC420A High Speed, Combi-Sense , Synchronous Power MOSFET Driver for Mobile Applications POWER MANAGEMENT Description Th...
Datasheet PDF File SC420A PDF File

SC420A
SC420A

Overview
SC420A High Speed, Combi-Sense , Synchronous Power MOSFET Driver for Mobile Applications POWER MANAGEMENT Description The SC420A is a cost effective Dual MOSFET Driver, incorporating Semtech’s patented Combi-SenseTM technology, designed for switching High and Low side Power MOSFETs Step-down Switching regulators.
A 30ns max POWERin MANAGEMENT propagation delay from input transition to the gate of www.
DataSheet4U.
com 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 synchronous MOSFETs.
reducing switching losses at high frequencies without causing thermal stress on the driver.
The high voltage CMOS process allows operation up to 27 Volts, making the SC420A suitable for adaptor powered applications.
Under-voltage-lockout and over-temperature shutdown features are included for proper and safe operation.
The SC420A is offered in a space saving MLP-12 package.
TM Features u High efficiency u Shutdown mode for increased power saving u Fast rise and fall times (10ns typical with 3000pF load) u 5V gate drive u Ultra-low (<30ns) 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 High current drive capability allows fast switching, thus u High frequency 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 performance in a small footprint Applications u High efficiency portable and notebook computers u Battery powered applications Conceptual Application Circuit VIN2 VIN D1 M1 VIN PWM FB CO VIN2 VIN TG BST Combi-Sense TM Controller IC GND CS- CS+ SC420A EN DRN BG CDELAY VPN CBST L1 VOUT EN M2 RVPN CVPN CDELAY CL Figure 1 Revision: April 1, 2004 1 United States Patent No.
6,441,597 www.
semtech.
com SC420A POWER MANAGEMENT Absolute Maximu...


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