MOSFET Driver. RT9610C Datasheet

RT9610C Driver. Datasheet pdf. Equivalent

RT9610C Datasheet
Recommendation RT9610C Datasheet
Part RT9610C
Description High Voltage Synchronous Rectified Buck MOSFET Driver
Feature RT9610C; ® RT9610C High Voltage Synchronous Rectified Buck MOSFET Driver for Notebook Computer General Desc.
Manufacture Richtek
Datasheet
Download RT9610C Datasheet




Richtek RT9610C
®
RT9610C
High Voltage Synchronous Rectified Buck MOSFET Driver
for Notebook Computer
General Description
The RT9610C is a high frequency, dual MOSFET driver
specifically designed to drive two power N-MOSFETS in
a synchronous-rectified buck converter topology. It is
especially suited for mobile computing applications that
require high efficiency and excellent thermal performance.
This driver, combined with Richtek's series of multi-phase
Buck PWM controllers, provides a complete core voltage
regulator solution for advanced microprocessors.
The drivers are capable of driving a 3nF load with fast
rising/falling time and fast propagation delay. This device
implements bootstrapping on the upper gates with only a
single external capacitor. This reduces implementation
complexity and allows the use of higher performance, cost
effective, N-MOSFETs. Adaptive shoot through protection
is integrated to prevent both MOSFETs from conducting
simultaneously.
The RT9610C is available in WDFN-8L 2x2 Package.
Marking Information
2QW
2Q : Product Code
W : Date Code
Features
Drives Two N-MOSFETs
Adaptive Shoot-Through Protection
0.5Ω On-Resistance, 4A Sink Current Capability
Supports High Switching Frequency
Tri-State PWM Input for Power Stage Shutdown
Output Disable Function
Integrated Boost Switch
Low Bias Supply Current
VCC POR Feature Integrated
Applications
Core Voltage Supplies for Intel® / AMD® Mobile
Microprocessors
High Frequency Low Profile DC/DC Converters
High Current Low Output Voltage DC/DC Converters
High Input Voltage DC/DC Converters
Ordering Information
RT9610C
Package Type
QW : WDFN-8L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek 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.
Simplified Application Circuit
VCC
Enable
PWM
RT9610C
VCC UGATE
BOOT
PHASE
EN
PWM LGATE
GND
VIN
VCORE
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9610C-00 February 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT9610C
RT9610C
Pin Configurations
(TOP VIEW)
EN 1
PHASE 2
UGATE 3
BOOT 4
8 VCC
7 LGATE
6 GND
9 5 PWM
WDFN-8L 2x2
Functional Pin Description
Pin No.
1
Pin Name
EN
Pin Function
Enable Pin. When low, both UGATE and LGATE are driven low and the normal
operation is disabled.
2
PHASE
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.
3
UGATE
Upper Gate Drive Output. Connect to the gate of high side power N-MOSFET.
Floating Bootstrap Supply Pin for Upper Gate Drive. Connect the bootstrap
4 BOOT capacitor between this pin and the PHASE pin. The bootstrap capacitor
provides the charge to turn on the upper MOSFET.
5 PWM
Control Input for Driver. The PWM signal can enter three distinct states during
operation. Connect this pin to the PWM output of the controller.
6,
9 (Exposed Pad)
GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
7
LGATE
Lower Gate Drive Output. Connect to the gate of the low side power
N-MOSFET.
8 VCC
Input Supply Pin. Connect this pin to a 5V bias supply. Place a high quality
bypass capacitor from this pin to GND.
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.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9610C-00 February 2015



Richtek RT9610C
Operation
POR (Power On Reset)
POR block detects the voltage at the VCC pin. When the
VCC pin voltage is higher than POR rising threshold, the
POR pin output voltage (POR output) is high. POR output
is low when VCC is not higher than POR rising threshold.
When the POR pin voltage is high, UGATE and LGATE
can be controlled by PWM input voltage. If the POR pin
voltage is low, both UGATE and LGATE will be pulled to
low.
Tri-State Detect
When both POR output and EN pin voltages are high,
UGATE and LGATE can be controlled by PWM input. There
are three PWM input modes which are high, low, and
shutdown state. If PWM input is within the shutdown
window, both UGATE and LGATE outputs are low. When
PWM input is higher than its rising threshold, UGATE is
high and LGATE is low. When PWM input is lower than
its falling threshold, UGATE is low and LGATE is high.
Control Logic
Control logic block detects whether high side MOSFET
is turned off by monitoring (UGATE - PHASE) voltages
below 1.1V or PHASE voltage below 2V. To prevent the
overlap of the gate drives during the UGATE pulls low and
the LGATE pulls high, low side MOSFET can be turned
on only after high side MOSFET is effectively turned off.
Shoot-Through Protection
Shoot-through protection block implements the dead-time
when both high side and low side MOSFETs are turned
off. With shoot-through protection block, high side and
low side MOSFETs are never turned on simultaneously.
Thus, shoot-through between high side and low side
MOSFETs is prevented.
RT9610C
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9610C-00 February 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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