RT9629B

Part No.:
RT9629B
Download:
Download
Description:
Triple-Channel Synchronous Rectified Buck MOSFET Driver
File Size:
220 K
Page:
14 Pages
Logo:
Maker:
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
PCB Prototype

July 16, 2018:

RTE25024

RWP05020-1H

S20WB20

S4PG-M3

S553-6500-B9

SC3425

SC668ULTRT

SD06H0SK

SD-45985-400

SD-48325-003

SD-503110-001

SD-95540-001

PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
®
RT9629B
Triple-Channel Synchronous Rectified Buck MOSFET
Driver
General Description
The RT9629B is a high frequency, triple-channel
synchronous rectified buck MOSFET driver specifically
designed to drive six power N-MOSFETs. The part is
promoted to pair with Richtek's multiphase buck PWM
controller family for high-density power supply
implementation. The output drivers of RT9629B can
efficiently switch power MOSFETs at frequency 300kHz
typically. Operating in higher frequency should consider
the thermal dissipation carefully. The device implements
bootstrapping on the upper gate with only an external
capacitor and a diode required. This reduces circuit
complexity and allows the use of higher performance, cost
effective N-MOSFETs. All drivers incorporate adaptive
shoot-through protection to prevent upper and lower
MOSFETs from conducting simultaneously and shorting
the input supply. The RT9629B has also detected the fault
condition during initial start-up before the multi-phase PWM
controller takes control. As a result, the input supply will
latch into the shutdown state. The RT9629B comes in a
small footprint package with WQFN-24L 5x5 package.
Features
Drive Six N-MOSFETs for 3-Phase Buck PWM Control
Shoot Through Protection
Embedded Bootstrap Diode
Support High Switching Frequency
Fast Output Rising Time
Tri-State PWM Input for Output Shutdown
Small 24-Lead WQFN Package
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
Marking Information
RT9629BZQW : Product Number
RT9629B
ZQW
YMDNN
YMDNN : Date Code
Simplified Application Circuit
12V
VCCx
RT9629B
PHASE1
PWM1
PWM1
L2
PWM2
PWM2
PHASE2
L3
PWM3
PWM3
PHASE3
GND
L1
V
OUT
V
IN
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9629B-03 October 2012
www.richtek.com
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