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  Richtek Technology Electronic Components Datasheet  

RT9600 Datasheet

Synchronous-Rectified Buck MOSFET Drivers

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RT9600 pdf
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 the RT9237/RT9241
series of 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 with 12V. Independent driving
of upper gate through PVCC pin is achievable. 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 can efficiently switch power
MOSFETs at frequency up to 500kHz. Switching frequency
above 500kHz has to take into account the thermal
dissipation of SOP-8 package. RT9600 is capable of driving
a 3000pF load with a 30ns rise time. RT9600 implements
bootstrapping on the upper gate with only an external
capacitor required. 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.
Ordering Information
RT9600
Package Type
S : SOP-8
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Note :
RichTek Pb-free 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.
Features
z Drives Two N-Channel MOSFETs
z Adaptive Shoot-Through Protection
z Internal Bootstrap Device
z Supports High Switching Frequency
- Fast Output Rise Time
z Small SOP-8 Package
z Dual Gate-Drive Voltages for Optimal Efficiency
z Tri-State Input for Bridge Shutdown
z Supply Under Voltage Protection
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Core Voltage Supplies for Intel Pentium® 4, AMD®
AthlonTM Microprocessors
z High Frequency Low Profile DC-DC Converters
z High Current Low Voltage DC-DC Converters
Pin Configurations
(TOP VIEW)
UGATE
BOOT
PWM
GND
8
27
36
45
SOP-8
PHASE
PVCC
VCC
LGATE
DS9600-03 March 2005
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9600 Datasheet

Synchronous-Rectified Buck MOSFET Drivers

No Preview Available !

RT9600 pdf
RT9600
Preliminary
Typical Application Circuit
+12V
+12V
R1
10
PWM
C3 C4
1uF 1000uF/16V
7
C1
1uF
3
62
VCC BOOT
PVCC UGATE
PHASE
RT9600
PWM LGATE
GND
4
C
1uF Q1
1 PHB83N03LT
L1
8
2uH
5 Q2
PHB95N03LT
R2
2.4K
R3
2.4K
C5
x1500uF
VCORE
C6
x1500uF
ISEN2
ISN2
Functional Pin Description
Pin No. Pin Name
Pin Function
1 UGATE
Upper Gate Drive Output. Connect to gate of high-side power N-Channel MOSFET
2 BOOT
Floating bootstrap supply pin for upper gate drive.
3 PWM
Input PWM signal for controlling the driver.
4 GND
Ground
5 LGATE
Lower gate drive output. Connect to gate of low-side power N-Channel MOSFET.
6 VCC
+12V Supply Voltage
7 PVCC
Upper Gate Drive Supply Bias. Typical +12V
8 PHASE
Connect this pin to the source of the high-side MOSFET and the drain of the low-side
MOSFET
Function Block Diagram
PVCC
VCC
Internal
Control
Logic
PWM
500K
500K
Shoot-
through
Protect
VCC
BOOT
UGATE
PHASE
LGATE
GND
www.richtek.com
2
DS9600-03 March 2005


Part Number RT9600
Description Synchronous-Rectified Buck MOSFET Drivers
Maker Richtek
Total Page 5 Pages
PDF Download
RT9600 pdf
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