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ADP3121
Dual Bootstrapped, 12 V
MOSFET Driver with Output
Disable
The ADP3121 is a dual, high voltage MOSFET driver optimized for
driving two N ? channel MOSFETs, the two switches in a non ? isolated
synchronous buck power converter. Each driver is capable of driving a
3000 pF load with a 20 ns propagation delay and a 15 ns transition
time.
http://onsemi.com
MARKING
DIAGRAMS
P3121
1
ALYW G
G
One of the drivers can be bootstrapped and is designed to handle the
high voltage slew rate associated with floating high ? side gate drivers.
The ADP3121 includes overlapping drive protection to prevent
shoot ? through current in the external MOSFETs.
The OD pin shuts off both the high ? side and the low ? side
MOSFETs to prevent rapid output capacitor discharge during system
shutdown.
The ADP3121 is specified over the commercial temperature range
of 0 ° C to 85 ° C and is available in 8 ? lead SOIC_N and 8 ? lead LFCSP
packages.
8
8
SO ? 8
D SUFFIX
CASE 751 ? 07
1
P3121A = Device Code
AL = Assembly Location
Y = Year
W = Work Week
G = Pb ? Free Package
(Note: Microdot may be in either location)
Features
? All ? In ? One Synchronous Buck Driver
? Bootstrapped High ? Side Drive
? One PWM Signal Generates Both Drives
? Anticross Conduction Protection Circuitry
? Overvoltage Protection
? OD for Disabling the Driver Outputs
? Meets CPU VR Requirement when Used with Flex ? Mode t
Controller
? These are Pb ? Free Devices
8
1
LFCSP8
MN SUFFIX
CASE 932AF
L7Q = Device Code
# = Pb ? Free Package
Y = Year
WW = Work Week
PIN ASSIGNMENT
L7Q
#YWW
Typical Applications
? Multiphase Desktop CPU Supplies
? Single Supply Synchronous Buck Converters
BST
IN
OD
V CC
DRVH
SWN
PGND
DRVL
ORDERING INFORMATION
Device
ADP3121JRZ ? RL
Package
SOIC_N
Shipping ?
2500/Tape & Reel
(Pb ? Free)
ADP3121JCPZ ? RL LFCSP_VD 5000/Tape & Reel
(Pb ? Free)
?For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
? Semiconductor Components Industries, LLC, 2010
February, 2010 ? Rev. 1
1
Publication Order Number:
ADP3121/D
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