RT9624A Datasheet, PDF (1/16 Pages) Richtek Technology Corporation – Single Phase Synchronous Rectified Buck MOSFET Driver

®
RT9624A
Single Phase Synchronous Rectified Buck MOSFET Driver
General Description
The RT9624A is a high frequency, synchronous rectified,
single phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9624A can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 24V. The
RT9624A also builds in an internal power switch to replace
external bootstrap diode.
The RT9624A can support switching frequency efficiently
up to 500kHz. The RT9624A 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 RT9624A
has tri-state PWM input with shutdown and EN input
shutdown functions, which can force driver to output low
UGATE and LGATE signals.
The RT9624A 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
z Drive Two N-MOSFETs
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 Enable Control
z Small SOP-8, SOP-8 (Exposed Pad) and 8-Lead
WDFN Packages
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
Simplified Application Circuit
R1
12V
C1
Chip Enable
PWM
Controller
RT9624A
VCC
R2
BOOT
UGATE
EN
PHASE
PWM _LGATE
GND
C_BOOT
R3
R4
V_IN
C5
C6
Q1
L1
V_OUT
R5
Q2
C2
C3 C4
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9624A-04 October 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1