Vishay Siliconix

SiP41103

Document Number: 72718

S-

61692–Rev. E, 04-Sep-06

www.vishay.com

1

Synchronous Rectification N-Channel MOSFET Driver

for DC/DC Conversion

FEATURES

• 5 V Gate Drive

• Undervoltage Lockout

• Internal Bootstrap Diode

• Adaptive Shoot-Through Protection

• Synchronous MOSFET Disable

• Adjustable Highside Propagation Delay

• Switching Frequency Up to 1 MHz

• Drive MOSFETs In 4.5 to 50 V Systems

APPLICATIONS

• Multi-Phase DC/DC Conversion

• High Current Synchronous Buck Converters

• High Frequency Synchronous Buck Converters

• Asynchronous-to-Synchronous Adaptations

• Mobile Computer DC/DC Converters

• Desktop Computer DC/DC Converters

DESCRIPTION

SiP41103 is a high-speed synchronous rectification

MOSFET driver with adaptive shoot-through protec-

tion for use in high frequency, high-current, mul-

tiphase DC-DC synchronous rectifier buck converter.

It is designed to operate at the switching frequencies

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

allow driving N-Channel MOSFET. Adaptive shoot-

through protection prevents simultaneous conduction

of external MOSFETs. Adding a capacitor to the delay

pin can further increase the high-side driver turn-on

delay by 1.2 ns/pF for further shoot-through protec-

tion.

The SiP41103 is available in both standard and lead

(Pb)-free 10-Pin MLP33 packages and is specified to

operate over the industrial temperature range of

- 40 °C to 85 °C.

TYPICAL APPLICATION CIRCUIT

*Pb containing terminations are not RoHS compliant, exemptions may apply

+ 5 to 50 V

+ 5 V

GND

Controller

GND

PWM

LX

BOOT

DELAY

SiP41103

1 µF

10 pF

0.1 µF

GND

Available

Pb-free

RoHS*

COMPLIANT