Preliminary
RT9600
Synchronous-Rectified Buck MOSFET Drivers
General Description
The RT9600 is a high frequency, dual MOSFET
driver specifically designed to drive two power N-
Channel MOSFETs in a synchronous-rectified buck
converter topology. This driver combined with a
RT9237 Multi-Phase Buck PWM controller form a
complete
core-voltage
regulator
solution
for
advanced microprocessors.
The RT9600 drives both the lower/upper gate in a
synchronous-rectifier bridge to 12V. Independent
driving of upper gate through PVCC pin is
achievable. Recommended PVCC ranges are from
8 to 12V for Rds(on) concern. This drive-voltage
flexibility provides the advantage of optimizing
applications involving trade-offs between switching
losses and conduction losses.
The output drivers in the RT9600 have the capacity
to efficiently switch power MOSFETs at frequencies
up to 2MHz. Each driver is capable of driving a
3000pF load with a 30ns propagation delay and
50ns
external
higher
transition
capacitor
time.
RT9600
This
implements
reduces
N-Channel
from
bootstrapping on the upper gate with only an
required.
implementation complexity and allows the use of
performance, cost effective,
to
prevent
both
MOSFETs. Adaptive shoot-through protection is
integrated
MOSFETs
conducting simultaneously.
Features
Drives Two N-Channel MOSFETs
Adaptive Shoot-Through Protection
Internal Bootstrap Device
Supports High Switching Frequency
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Fast Output Rise Time
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Propagation Delay 30ns
Small SOP-8 Package
Dual Gate-Drive Voltages for Optimal Efficiency
Three-State Input for Bridge Shutdown
Supply Under Voltage Protection
High Side Short Circuit Protection
Applications
Core Voltage Supplies for Intel Pentium
AMD Athlon
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TM
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4,
Microprocessors
High Frequency Low Profile DC-DC Converters
High Current Low Voltage DC-DC Converters
Pin Configurations
Part Number
RT9600CS
(Plastic SOP-8)
Pin Configurations
TOP VIEW
UGATE 1
BOOT 2
PWM 3
GND 4
8 PHASE
7 PVCC
6 VCC
5 LGATE
Ordering Information
RT9600
Package Type
S : SOP-8
Operating temperature range
C: Commercial standard
DS9600-00 July 2001
www.richtek-ic.com.tw
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