ADP3120A
Dual Bootstrapped, 12 V
MOSFET Driver with Output
Disable
The ADP3120A is a single Phase 12 V MOSFET gate drivers
optimized to drive the gates of both high−side and low−side power
MOSFETs in a synchronous buck converter. The high−side and
low−side driver is capable of driving a 3000 pF load with a 45 ns
propagation delay and a 25 ns transition time.
With a wide operating voltage range, high or low side MOSFET
gate drive voltage can be optimized for the best efficiency. Internal
adaptive nonoverlap circuitry further reduces switching losses by
preventing simultaneous conduction of both MOSFETs.
http://onsemi.com
MARKING
DIAGRAMS
8
3120A
ALYW
G
SO−8
D SUFFIX
CASE 751
8
1
1
The floating top driver design can accommodate VBST voltages as
high as 35 V, with transient voltages as high as 40 V. Both gate outputs
can be driven low by applying a low logic level to the Output Disable
(OD) pin. An Undervoltage Lockout function ensures that both driver
outputs are low when the supply voltage is low, and a Thermal
Shutdown function provides the IC with overtemperature protection.
1
8
DFN8
MN SUFFIX
CASE 506BJ
L3C
ALYWG
G
1
A
L
Y
= Assembly Location
= Wafer Lot
Features
= Year
W = Work Week
• All−In−One Synchronous Buck Driver
• Bootstrapped High−Side Drive
G
= Pb−Free Package
• One PWM Signal Generates Both Drives
• Anticross Conduction Protection Circuitry
• OD for Disabling the Driver Outputs Meets CPU VR Requirement
when Used with Patented FlexModet Controller
• These are Pb−Free Devices
PIN CONNECTIONS
1
8
BST
IN
DRVH
SWN
OD
PGND
DRVL
V
CC
Applications
1
8
• Multiphase Desktop CPU Supplies
• Single−Supply Synchronous Buck Converters
BST
IN
DRVH
SWN
OD
PGND
V
CC
DRVL
(Top View)
ORDERING INFORMATION
†
Device
Package
Shipping
98 Units / Rail
ADP3120AJRZ
SO−8
(Pb−Free)
ADP3120AJRZ−RL
SO−8
(Pb−Free)
2500 Tape & Reel
5000 Tape & Reel
ADP3120AJCPZ−RL DFN8
(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, 2008
1
Publication Order Number:
August, 2008 − Rev. 3
ADP3120A/D