RT9602
Dual Channel Synchronous-Rectified Buck MOSFET Driver
General Description
The RT9602 is a dual power channel MOSFET driver
specifically designed to drive four power N-Channel
MOSFETs in a synchronous-rectified buck converter
topology. These drivers combined with RT9237/A and
RT9241A/B series of Multi-Phase Buck PWM controllers
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 protect-ion 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 SOP-14 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
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Core Voltage Supplies for Intel Pentium
®
4 and AMD
®
Athlon
TM
Microprocessors
High Frequency Low Profile DC-DC Converters
High Current Low Voltage DC-DC Converters
Pin Configurations
(TOP VIEW)
PWM1
PWM2
GND
LGATE1
PVCC
PGND
LGATE2
2
3
4
5
6
7
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
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
SOP-14
Note :
RichTek Pb-free and Green products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
100%matte tin (Sn) plating.
DS9602-08 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
