MOSFET Driver. RT9625B Datasheet

RT9625B Driver. Datasheet pdf. Equivalent

RT9625B Datasheet
Recommendation RT9625B Datasheet
Part RT9625B
Description Dual-Channel Synchronous Rectified MOSFET Driver
Feature RT9625B; .
Manufacture Richtek
Datasheet
Download RT9625B Datasheet




Richtek RT9625B
®
RT9625B
Dual-Channel Synchronous Rectified MOSFET Driver
General Description
The RT9625B is a high frequency, synchronous rectified,
two phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9625B can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 23V. The
RT9625B also builds in internal power switches to replace
external bootstrap diodes.
The RT9625B can support switching frequency efficiently
up to 500kHz. The RT9625B has the 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 RT9625B has tri-state
PWM input with shutdown function, which can force driver
to output low UGATE and LGATE signals.
The RT9625 comes in a small footprint with WQFN-16L
4x4 package.
Features
z Drive Four N-MOSFETs for Two-Phase PWM Control
z Shoot Through Protection
z Embedded Bootstrap Diode
z Support High Switching Frequency
z Fast Output Rising Time
z Tri-State PWM Input for Output Shutdown
z Small 16-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Core Voltage Supplies for Desktop, Motherboard CPU
z High Frequency Low Profile DC/DC Converters
z High Current Low Voltage DC/DC Converters
z Core Voltage Supplies for GFX Card
Marking Information
09 : Product Code
09 YM
DNN
YMDNN : Date Code
Simplified Application Circuit
12V
PWM1
PWM2
VCC
RT9625B
PHASE1
PWM1
PWM2
PHASE2
GND
VIN
L1
VOUT
L2
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9625B-03 June 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT9625B
RT9625B
Ordering Information
RT9625B
Package Type
QW : WQFN-16L 4x4 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
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)
16 15 14 13
BOOT2 1
12 VCC
GND 2
PWM2 3
NC 4
GND
17
11 LGATE1
10 PHASE1
9 UGATE1
56 78
WQFN-16L 4x4
Function Pin Description
Pin No.
1
Pin Name
BOOT2
8 BOOT1
2,
13 (Exposed Pad)
GND
3 PWM2
6 PWM1
4, 5 NC
7 POR
9 UGATE1
16 UGATE2
10 PHASE1
15 PHASE2
11 LGATE1
14 LGATE2
12 VCC
Pin Function
Bootstrap Power Pins for Channel 2 and Channel 1. This pin powers the high
side MOSFET driver. Connect this pin to the junction of the bootstrap
capacitor and the cathode of the bootstrap diode.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
PWM Signal Input. Connect this pin to the PWM output of the controller.
No Internal Connection.
Power On Reset Signal.
High Side Gate Drive Outputs for channel 1 and channel 2. Connect this pin
to Gate of high side power MOSFET.
Switch Nodes of High Side Driver 1 and Driver 2. Connect this pin to the high
side MOSFET Source together with the low side MOSFET Drain and the
inductor.
Low Side Gate Drive Output for Channel 1 and Channel 2. This pin drives the
Gate of low side MOSFET.
Supply Input. VCC supplies current for Channel 1 and Channel 2 gate
drivers.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9625B-03 June 2013



Richtek RT9625B
Function Block Diagram
VCC
RT9625B
POR
Internal
VDD
POR
PWM1
Tri-State
Detect
Internal
VDD
PWM2
Tri-State
Detect
Bootstrap
Control
Shoot-Through
Protection
Turn Off
Detection
VCC1
Shoot-Through
Protection
Bootstrap
Control
Shoot-Through
Protection
Turn Off
Detection
Shoot-Through
Protection
VCC
VCC
BOOT1
UGATE1
PHASE1
LGATE1
GND
BOOT2
UGATE2
PHASE2
LGATE2
GND
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9625B-03 June 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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