SI4724CY

www.DataSheet4U.com 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 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 Level Shift Undervoltage Lockout VDD IN SYNC EN Q1 S1 D2 Q2 + GND S2 VREF Document Number: 71863 S-03922—Rev. D, 19-May-03 www.vishay.com 1 www.DataSheet4U.com Si4724CY Vishay Siliconix ABSOLUTE MAXIMUM RATINGS (TA = 25_C UNLESS OTHERWISE NOTED) Parameter Logic Supply Logic Inputs Drain Voltage Bootstrap Voltage Synchronous Pin Voltage TA = 25_C Continuous Drain Current TA =70_C TA = 25_C TA =70_C Maximum Power Dissipationa Driver Operating Junction and Storage Temperatur...