Preliminary
RT9602
Dual Channel Synchronous-Rectified Buck MOSFET Driver
General Description
The RT9602 is a, twin power channel MOSFET driver
specifically designed to drive four power N-Channel
MOSFETs in a synchronous-rectified buck converter
topology.
These
drivers
combined
with
a
RT9237/RT9241 series of Multi-Phase Buck PWM
controller provide a complete core voltage regulator
solution for advanced microprocessors.
The RT9602 can provide flexible gate driving for both
high side and low side drivers. This gives more
flexibility of MOSFET selection.
The output drivers in the RT9602 have the capability
to drive a 3000pF load with a 40ns propagation delay
and 80ns transition time. This device implements
bootstrapping on the upper gates with only a single
external capacitor required for each power channel.
This reduces implementation complexity and allows
the use of higher performance, cost effective, N-
Channel
MOSFETs.
Adaptive
shoot-through
protection is integrated to prevent both MOSFETs
from conducting simultaneously.
The RT9602 can detect high side MOSFET drain-to-
source electrical short at power on and pull the 12V
power by low side MOS and cause power supply to
go into over current shutdown to prevent damage of
CPU.
Features
Drives Four N-Channel MOSFETs
Adaptive Shoot-Through Protection
Internal Bootstrap Devices
Small 14-Lead SOIC Package
5V to 12V Gate-Drive Voltages for Optimal
Efficiency
Tri-State Input for Bridge Shutdown
Supply Under-Voltage Protection
Power ON Over-Voltage Protection
Applications
Core Voltage Supplies for Intel Pentium铮?4 and
AMD铮?Athlon
TM
Microprocessors
High Frequency Low Profile DC-DC Converters
High Current Low Voltage DC-DC Converters
Pin Configurations
Part Number
RT9602CS
(Plastic SOP-14)
PWM1
PWM2
GND
LGATE1
PVCC
PGND
LGATE2
1
2
3
4
5
6
7
Pin Configurations
TOP VIEW
14
13
12
11
10
9
8
VCC
PHASE1
UGATE1
BOOT1
BOOT2
UGATE2
PHASE2
Ordering Information
RT9602
Package type
S : SOP-14
Operating temperature range
C: Commercial standard
DS9602-00 January 2002
www.richtek-ic.com.tw
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