RT9625B Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – Dual-Channel Synchronous Rectified MOSFET Driver

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RT9625B
Dual-Channel Synchronous Rectified MOSFET Driver
General Description
The RT9625B is a high frequency, synchronous rectified,
two phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9625B can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 23V. The
RT9625B also builds in internal power switches to replace
external bootstrap diodes.
The RT9625B can support switching frequency efficiently
up to 500kHz. The RT9625B has the UGATE and LGATE
driving circuits for synchronous rectified DC/DC converter
applications. The shoot through protection mechanism is
designed to prevent shoot through between high side and
low side power MOSFETs. The RT9625B has tri-state
PWM input with shutdown function, which can force driver
to output low UGATE and LGATE signals.
The RT9625 comes in a small footprint with WQFN-16L
4x4 package.
Features
z Drive Four N-MOSFETs for Two-Phase PWM Control
z Shoot Through Protection
z Embedded Bootstrap Diode
z Support High Switching Frequency
z Fast Output Rising Time
z Tri-State PWM Input for Output Shutdown
z Small 16-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Core Voltage Supplies for Desktop, Motherboard CPU
z High Frequency Low Profile DC/DC Converters
z High Current Low Voltage DC/DC Converters
z Core Voltage Supplies for GFX Card
Marking Information
09 : Product Code
09 YM
DNN
YMDNN : Date Code
Simplified Application Circuit
12V
PWM1
PWM2
VCC
RT9625B
PHASE1
PWM1
PWM2
PHASE2
GND
V_IN
L1
V_OUT
L2
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9625B-02 September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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