SiP41109/41110

Vishay Siliconix

New Product

Document Number: 73023

S-51104—Rev. A, 13-Jun-05

www.vishay.com

1

Half-Bridge N-Channel MOSFET Driver for DC/DC Conversion

FEATURES

APPLICATIONS

D PWM With Tri-State Enable

D 12-V Low-Side Gate Drive (SiP41109)

D 8-V Low-Side Gate Drive (SiP41110)

D Undervoltage Lockout

D Internal Bootstrap Diode

D Switching Frequency Up to 1 MHz

D 30-ns Max Propagation Delay

D Drive MOSFETs In 5- to 48-V Systems

D Adaptive Shoot-Through Protection

D Multi-Phase DC/DC Conversion

D High Current Low Voltage DC/DC Converters

D High Frequency DC/DC Converters

D Mobile and Desktop Computer DC/DC Converters

D Core Voltage Supplies for PC Micro-Processors

DESCRIPTION

The SiP41109 and SiP41110 are high-speed half-bridge

MOSFET drivers for use in high frequency, high current,

multiphase dc-to-dc synchronous rectifier buck power

supplies. They are designed to operate at switching

frequencies up to 1 MHz. The high-side driver is bootstrapped

to allow driving n-channel MOSFETs.

They feature adaptive shoot-through protection to prevent

simultaneous conduction of the external MOSFETs. There are

two options available for the voltage of the high-side and

low-side drivers. In the SiP41109, the regulator supplies gate

low-side driver. in the SiP41110, the regulator supplies the

high- and low-side gate drive voltage.

The SiP41109 and SiP41110 are assembled in a

lead (Pb)-free 8-pin SOIC package for operation over the

industrial operating range (−40 _C to 85 _C).

TYPICAL APPLICATION CIRCUIT

Controller

PWM

(Tri-State)

GND

GND

GND

+12 V

+5 to 48 V

BOOT

UGATE

PHASE

LGATE

SiP41109/41110

PVcc