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| RT9628A Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – High Voltage Synchronous Rectified Triple Channel Buck MOSFET Driver | |||
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RT9628A
High Voltage Synchronous Rectified Triple Channel Buck
MOSFET Driver for Notebook Computer
General Description
The RT9628A is a high frequency, triple Channel driver
specifically designed to drive two power N-MOSFETs in
each channel of a synchronous-rectified Buck converter
topology. It is especially suited for mobile computing
applications that require high efficiency and excellent
thermal performance. This driver, combined with Richtek's
series of multi-phase Buck PWM controllers, provides a
complete core voltage regulator solution for advanced
microprocessors.
The drivers are capable of driving a 3nF load with fast
rising/falling time and fast propagation delay. This device
implements bootstrapping on the upper gates with only a
single external capacitor. This reduces implementation
complexity and allows the use of higher performance, cost
effective, N-MOSFETs. Adaptive shoot through protection
is integrated to prevent both MOSFETs from conducting
simultaneously.
Features
ï¬ Triple Channel Driver
ï¬ Each Channel Drives Two N-MOSFETs
ï¬ Adaptive Shoot-Through Protection
ï¬ 0.5Ω On-Resistance, 4A Sink Current Capability
ï¬ Supports High Switching Frequency
ï¬ Tri-State PWM Input for Power Stage Shutdown
ï¬ Output Disable Function
ï¬ Integrated Boost Switch
ï¬ Low Bias Supply Current
ï¬ VCC POR Feature Integrated
Applications
ï¬ Core Voltage Supplies for Intel® / AMD® Mobile
Microprocessors
ï¬ High Frequency Low Profile DC/DC Converters
ï¬ High Current Low Output Voltage DC/DC Converters
ï¬ High Input Voltage DC/DC Converters
Marking Information
00= : Product Code
00=YM
DNN
YMDNN : Date Code
Simplified Application Circuit
12V
PWM1
PWM2
PWM3
Enable
VCCx
RT9628A
PHASE1
PWM1
PWM2
PHASE2
PWM3
EN
PHASE3
GND
VIN
L1
VOUT
L2
L3
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9628A-00 October 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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