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NCP3418B
MOSFET Driver with Dual
Outputs for Synchronous
Buck Converters
The NCP3418B 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
http://onsemi.com
MARKING
DIAGRAMS
8
gate drive voltage can be optimized for the best efficiency. Internal
SO?8
3418B
adaptive nonoverlap circuitry further reduces switching losses by
preventing simultaneous conduction of both MOSFETs.
8
1
D SUFFIX
CASE 751
ALYW
G
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
1
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.
DFN?10
MN SUFFIX
CASE 485C
3418B
ALYW
G
The NCP3418B is pin?to?pin compatible with Analog Devices
ADP3418 with the following advantages:
A
L
= Assembly Location
= Wafer Lot
Features
? Faster Rise and Fall Times
? Thermal Shutdown for System Protection
? Internal Pulldown Resistor Suppresses Transient Turn On of Either
Y = Year
W = Work Week
G = Pb?Free Package
PIN CONNECTIONS
?
?
?
?
?
?
?
?
?
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
These are Pb?Free Devices
BST
IN
OD
V CC
BST
IN
OD
V CC
V CC
1
1
8
10
DRVH
SWN
PGND
DRVL
DRVH
SWN
PGND
PGND
DRVL
(Top View)
ORDERING INFORMATION
Device
NCP3418BDR2G
Package
SO?8
(Pb?Free)
Shipping ?
2500 Tape & Reel
NCP3418BMNR2G DFN?10
3000 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
March, 2006 ? Rev. 5
1
Publication Order Number:
NCP3418B/D
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