RT9624B_15 Datasheet, PDF (1/16 Pages) Richtek Technology Corporation – Single Phase Synchronous Rectified Buck MOSFET Driver

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RT9624B
Single Phase Synchronous Rectified Buck MOSFET Driver
General Description
The RT9624B is a high frequency, synchronous rectified,
single phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9624B can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 24V. The
IC also builds in an internal power switch to replace
external bootstrap diode.
The RT9624B can support switching frequency efficiently
up to 500kHz. The IC has both 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 RT9624B has tri-state
PWM input with shutdown function, which can force driver
to output low UGATE and LGATE signals.
The RT9624B comes in a small footprint with 8-pin
packages. The choice of package types includes SOP-8,
SOP-8 (Exposed Pad) and WDFN-8L 3x3.
Features
 Drive Two N-MOSFETs
 Shoot Through Protection
 Embedded Bootstrap Diode
 Support High Switching Frequency
 Fast Output Rising Time
 Tri-State PWM Input for Output Shutdown
 Small SOP-8, SOP-8 (Exposed Pad) and 8-Lead
WDFN Packages
 RoHS Compliant and Halogen Free
Applications
 Core Voltage Supplies for Desktop, Motherboard CPU
 High Frequency Low Profile DC/DC Converters
 High Current Low Voltage DC/DC Converters
 Core Voltage Supplies for GFX Card
Simplified Application Circuit
R1
12V
C1
PWM
Controller
RT9624B
VCC
R2
BOOT
PWM
GND
UGATE
PHASE
LGATE
C_BOOT
R3
R4
V_IN
C5
C6
Q1
L1
V_OUT
R5
Q2
C2
C3 C4
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9624B-07 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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