MOSFET Driver. RT9624G Datasheet

RT9624G Driver. Datasheet pdf. Equivalent

RT9624G Datasheet
Recommendation RT9624G Datasheet
Part RT9624G
Description Single Phase Synchronous Rectified Buck MOSFET Driver
Feature RT9624G; ® RT9624G Single Phase Synchronous Rectified Buck MOSFET Driver General Description The RT9624G is.
Manufacture Richtek
Datasheet
Download RT9624G Datasheet




Richtek RT9624G
®
RT9624G
Single Phase Synchronous Rectified Buck MOSFET Driver
General Description
The RT9624G is a high frequency, synchronous rectified,
single phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9624G can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 24V. The
RT9624G also builds in an internal power switch to replace
external bootstrap diode.
The RT9624G can support switching frequency efficiently
up to 500kHz. The RT9624G has both UGATE and LGATE
driving circuits for synchronous rectified DC/DC converter
applications. The shoot through protection mechanism is
designed to prevent shoot through between high-side and
low-side power MOSFETs. The RT9624G has tri-state
PWM input with shutdown and EN input shutdown
functions, which can force driver to output low UGATE
and LGATE signals.
The RT9624G is available in a small footprint WDFN-8SL
2x2 package.
Features
Drive Two N-MOSFETs
Shoot-Through Protection
Embedded Bootstrap Switch
Support High Switching Frequency
Fast Output Rising Time
Tri-State PWM Input for Output Shutdown
Enable Control
Small 8-Lead WDFN Package
RoHS Compliant and Halogen Free
Applications
Core Voltage Supplies for Desktop, Motherboard CPU
High Frequency Low Profile DC/DC Converters
High Current Low Voltage DC/DC Converters
Core Voltage Supplies for GFX Card
Marking Information
2A : Product Code
2AW
W : Date Code
Simplified Application Circuit
R1
12V
RT9624G
VCC
BOOT
R2
C1
Enable
EN
UGATE
PHASE
CBOOT
R3
PWM
Controller
PWM LGATE
GND
R4
C5 C6
VIN
Q1
L1
VOUT
R5
Q2
C2
C3 C4
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9624G-01 April 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT9624G
RT9624G
Ordering Information
RT9624G
Package Type
QWA : WDFN-8SL 2x2 (W-Type)
(Exposed Pad-Option 1)
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.
Pin Configurations
(TOP VIEW)
BOOT
PWM
EN
VCC
1
2
3
4
8 UGATE
7 PHASE
6 GND
9 5 LGATE
WDFN-8SL 2x2
Function Pin Description
Pin No.
Pin Name
Pin Function
1
BOOT
Bootstrap Supply for High-Side Gate Driver.
2 PWM PWM Signal Input. Connect this pin to the PWM output of the controller.
3 EN
Enable Control Input (Active High). When this pin is low, both UGATE and
LGATE are driven to low.
4 VCC
Supply Voltage Input.
5 LGATE
6,
9 (Exposed Pad)
GND
7 PHASE
8 UGATE
Low-Side Gate Driver Output. Connect this pin to the Gate of low-side power
N-MOSFET.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Connect this pin to the Source of the high-side N-MOSFET and the Drain of the
low-side N-MOSFET.
High-Side Gate Driver Output. Connect this pin to the Gate of high-side power
N-MOSFET.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9624G-01 April 2014



Richtek RT9624G
Function Block Diagram
EN VCC
RT9624G
Internal
VDD
Enable
Detect
POR
PWM
Tri-State
Detect
Bootstrap
Control
Shoot-Through
Protection
Turn-Off
Detection
Shoot-Through
Protection
VCC
BOOT
UGATE
PHASE
LGATE
GND
Operation
POR (Power On Reset)
The POR block detects the voltage at the VCC pin. When
the VCC pin voltage is higher than POR rising threshold,
the POR block output is high. The POR output is low
when VCC is less than POR rising threshold. When the
POR block output is high, UGATE and LGATE can be
controlled by PWM input voltage. If the POR block output
is low, both UGATE and LGATE will be pulled to low.
Enable Detect
When EN pin input voltage is higher than EN rising
threshold, MOSFET driver is enabled. When the EN input
and POR output are high, UGATE and LGATE can be
controlled by PWM input voltage. When EN input is low,
both UGATE and LGATE are pulled to low.
Tri-State Detect
When both POR block 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 output 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.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9624G-01 April 2014
Bootstrap Control
The bootstrap control block controls the integrated
bootstrap switch. When LGATE is high (low-side MOSFET
is turned on), the bootstrap switch is turned on to charge
the bootstrap capacitor connected to BOOT pin. When
LGATE is low (low-side MOSFET is turned off), the
bootstrap switch is turned off to disconnect VCC pin and
BOOT pin.
Turn-Off Detection
The turn-off detection block detects whether high-side
MOSFET is turned off by monitoring the PHASE pin
voltage. To avoid shoot-through between high-side and low-
side MOSFETs, low-side MOSFET can be turned on only
after high-side MOSFET is effectively turned off.
Shoot-Through Protection
The 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 MOSFET are never turned on simultaneously.
Thus, shoot-through between high-side and low-side
MOSFETs is prevented.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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