RT9610A Datasheet, PDF (3/15 Pages) Richtek Technology Corporation – High Voltage Synchronous Rectified Buck MOSFET Driver for Notebook Computer

RT9610A/B
Functional Pin Description
Pin No.
Pin Name
WQFN-8L 3x3 WDFN 8L 2x2
1
4
BOOT
2
5
PWM
3,
9 (Exposed Pad)
6,
9 (Exposed Pad)
GND
4
7
LGATE
5
8
VCC
6
1
EN
7
2
PHAS E
8
3
UGATE
Pin Function
Floating Bootstrap Supply Pin for Upper Gate Drive. Connect
the bootstrap capacitor between this pin and the PHASE pin.
The bootstrap capacitor provides the charge to turn on the
upper MOSFET.
Control Input for Driver. The PWM signal can enter three
distinct states during operation. Connect this pin to the PWM
output of the controller.
Ground. The exposed pad must be soldered to a large PCB
and connected to GND for maximum power dissipation.
Lower Gate Drive Output. Connect to the gate of the low side
power N-MOSFET.
Input Supply Pin. Connect this pin to a 5V bias supply. Place a
high quality bypass capacitor from this pin to GND.
Enable Pin. When low, both UGATE and LGATE are driven low
and the normal operation is disabled.
Switch Node. Connect this pin to the source of the upper
MOSFET and the drain of the lower MOSFET. This pin
provides a return path for the upper gate driver.
Upper Gate Drive Output. Connect to the gate of high side
power N-MOSFET.
Function Block Diagram
VCC
POR
EN
PWM
VCC
Control
Logic
R
Tri-State
Detect
R
Shoot-Through
Protection
VCC
BOOT
UGATE
PHASE
LGATE
GND
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9610A/B-06 September 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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