MOSFET Drivers. RT9611B Datasheet

RT9611B Drivers. Datasheet pdf. Equivalent

RT9611B Datasheet
Recommendation RT9611B Datasheet
Part RT9611B
Description Synchronous Rectified Buck MOSFET Drivers
Feature RT9611B; ® RT9611A/B Synchronous Rectified Buck MOSFET Drivers General Description The RT9611A/B is a high .
Manufacture Richtek
Datasheet
Download RT9611B Datasheet




Richtek RT9611B
®
RT9611A/B
Synchronous Rectified Buck MOSFET Drivers
General Description
The RT9611A/B is a high frequency, synchronous rectified,
single phase dual MOSFET driver designed to adapt from
normal MOSFET driving applications to high performance
CPU VR driving capabilities.
The RT9611A/B can be utilized under both VCC = 5V or
VCC = 12V applications. The RT9611A/B also builds in an
internal power switch to replace external boot strap diode.
The RT9611A/B can support switching frequency efficiently
up to 500kHz. The RT9611A/B has the UGATE driving
circuit and the LGATE driving circuit for synchronous
rectified DC/DC converter applications. The driving rise/
fall time capability is designed within 30ns and the shoot
through protection mechanism is designed to prevent shoot
through of high side and low side power MOSFETs. The
RT9611A/B has PWM tri-state shut down and OD input
shut down functions which can force driver output into
high impedance.
The difference of the RT9611A and the RT9611B is the
propagation delay, tUGATEpdh. The RT9611B has
comparatively large tUGATEpdh than RT9611B. Hence, the
RT9611A is usually recommended to be utilized in
performance oriented applications, such as high power
density CPU VR or GPU VR.
The RT9611A/B comes in a small footprint with 8-pin
packages. The choice of packages type includes SOP-8,
SOP-8 (Exposed Pad) and WDFN-8EL 3x3.
Features
z Drive Two N-MOSFETs
z Adaptive Shoot Through Protection
z Embedded Bootstrap Diode
z Support High Switching Frequency
z Fast Output Rise Time
z Tri-State Input for Bridge Shutdown
z Disable Control Input
z Small SOP-8, SOP-8 (Exposed Pad) and 8-Lead
WDFN Packages
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
Ordering Information
RT9611A/B
Package Type
S : SOP-8
SP : SOP-8 (Exposed Pad-Option1)
QW : WDFN-8EL 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Long Dead Time
Short Dead Time
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.
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9611A/B-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT9611B
RT9611A/B
Pin Configurations
BOOT
PWM
OD
VCC
8
27
36
45
SOP-8
UGATE
PHASE
GND
LGATE
BOOT 1
8 UGATE
PWM 2
OD 3
VCC 4
GND
9
7 PHASE
6 GND
5 LGATE
WDFN-8EL 3x3
(TOP VIEW)
BOOT
PWM
OD
VCC
8
27
GND
36
9
45
UGATE
PHASE
GND
LGATE
SOP-8 (Exposed Pad)
Marking Information
RT9611xGS
RT9611x
GSYMDNN
RT9611xGS : Product Number
x : A or B
YMDNN : Date Code
RT9611xGSP
RT9611x
GSPYMDNN
RT9611xGSP : Product Number
x : A or B
YMDNN : Date Code
RT9611xZS
RT9611x
ZSYMDNN
RT9611xZS : Product Number
x : A or B
YMDNN : Date Code
RT9611AGQW
02=YM
DNN
02= : Product Code
YMDNN : Date Code
RT9611xZSP
RT9611x
ZSPYMDNN
RT9611xZSP : Product Number
x : A or B
YMDNN : Date Code
RT9611BGQW
04=YM
DNN
04= : Product Code
YMDNN : Date Code
RT9611AZQW
02 YM
DNN
02 : Product Code
YMDNN : Date Code
RT9611BZQW
04 YM
DNN
04 : Product Code
YMDNN : Date Code
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9611A/B-03 June 2012



Richtek RT9611B
Typical Application Circuit
RT9611A/B
ATX_12V
ATX_12V
C6
1000µF
x3
C7
10µF
x4
R1
10
RT9611A/B
R2
4 VCC
BOOT 1 1
C1
1µF
8
UGATE
5V
3
OD
PHASE 7
PWM
2 PWM
LGATE 5
GND
6
C2
1µF R3
2.2
R4
0
VIN
Q1 L1
1µH
R5
2.2
Q2
C3
3.3nF
C4
2200µF
x2
VCORE
C5
10µF
x2
Timing Diagram
PWM
LGATE
tpdlLGATE
90%
1.5V
UGATE
1.5V
tpdhUGATE
tpdlUGATE
1.5V
90%
1.5V
tpdhLGATE
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9611A/B-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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