NCP3488 Datasheet, PDF (1/7 Pages) ON Semiconductor – MOSFET Driver with Dual Outputs for Synchronous Buck Converters

NCP3488
MOSFET Driver with Dual
Outputs for Synchronous
Buck Converters
The NCP3488 is a single Phase 12 V MOSFET gate driver
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 25 ns
propagation delay and a 20 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.
The floating top driver design can accommodate VBST voltages as
high as 30 V, with transient voltages as high as 35 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.
Features
• Thermal Shutdown for System Protection
• Internal Pulldown Resistor Suppresses Transient Turn On of Either
MOSFET
• Anti Cross−Conduction Protection Circuitry
• Floating Top Driver Accommodates Boost Voltages of up to 30 V
• One Input Signal Controls Both the Upper and Lower Gate Outputs
• Output Disable Control Turns Off Both MOSFETs
• Complies with VRM10.x and VRM11.x Specifications
• Undervoltage Lockout
• Thermal Shutdown
• Thermally Enhanced Package Available
• This is a Pb−Free Device
http://onsemi.com
8
1
SO−8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
N3488
ALYW
G
1
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
1
BST
IN
OD
V_CC
8
DRVH
SWN
PGND
DRVL
ORDERING INFORMATION
Device
Package
Shipping^†
NCP3488DR2G
SO−8 2500 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, 2006
1
May, 2006 − Rev. 1
Publication Order Number:
NCP3488/D