Description

The SC420A 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 30ns 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 synchronous MOSFETs.

Features

● High efficiency

● Shutdown mode for increased power saving

● Fast rise and fall times (10ns typical with 3000pF load)

● 5V gate drive

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

● Adaptive and programmable non-overlapping gate drives provide shoot-through protection

● Floating top drive switches up to 27V

● High frequency operation allows use of small inductors and low cost ceramic capacitors

● Under-voltage lockout

● Low quiescent current

● MLP packaging provides superior thermal performance in a small footprint

Applications

● High efficiency portable and notebook computers

● Battery powered applications