71863| Datasheet

By datasheet - February 7th, 2009

71863| Datasheet

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Si4724CY
Vishay Siliconix

N-Channel Synchronous MOSFETs with Break-Before-Make

FEATURES
D D D D D 0- to 30-V Operation Driver Impedance--3 W Undervoltage Lockout Fast Switching Times 30-V MOSFETs D D D D High Side: 0.0375 W @ VDD = 4.5 V Low Side: 0.029 W @ VDD = 4.5 V Switching Frequency: 250 kHz to 1 MHz Integrated Schottky
Pb-free Available

DESCRIPTION
The Si4724CY n-channel synchronous MOSFET with break-before-make (BBM) is a high speed driver designed to operate in high frequency dc-dc switchmode power supplies. It's purpose is to simplify the use of n-channel MOSFETs in high frequency buck regulators. This device is designed to be used with any single output PWM IC or ASIC to produce a highly efficient low cost synchronous rectifier converter. A synchronous enable pin (disable = low, enable = high) controls the synchronous function for light load conditions. The Si4724CY is packaged in Vishay Siliconix's high performance LITTLE FOOTR SO-16 package.

FUNCTIONAL BLOCK DIAGRAM

VDD

BOOT D1 Q1 S1 VDD D2

Level Shift Undervoltage Lockout

IN SYNC EN

+ - GND

S2 VREF

Document Number: 71863 S-50244--Rev. E, 21-Feb-05

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