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NCP5351 Datasheet, PDF (1/14 Pages) ON Semiconductor – 4 A Synchronous Buck Power MOSFET Driver | |||
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NCP5351
4 A Synchronous Buck
Power MOSFET Driver
The NCP5351 is a dual MOSFET gate driver optimized to drive the
gates of both highâside and lowâside Power MOSFETs in a
Synchronous Buck converter. The NCP5351 is an excellent
companion to multiphase controllers that do not have integrated gate
drivers, such as ON Semiconductorâs CS5323, CS5305 or CS5307.
This architecture provides a power supply designer the flexibility to
locate the gate drivers close to the MOSFETs.
The 4.0 A drive capability makes the NCP5351 ideal for minimizing
switching losses in MOSFETs with large input capacitance. Optimized
internal, adaptive nonoverlap circuitry further reduces switching
losses by preventing simultaneous conduction of both MOSFETs.
The floating top driver design can accommodate MOSFET drain
voltages as high as 25 V. Both gate outputs can be driven low, and
supply current reduced to less than 25 mA, by applying a low logic
level to the Enable (EN) 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.
The NCP5351 is pinâtoâpin compatible with the SC1205 and is
available in a standard SOâ8 package and thermally enhanced
QFNâ10.
Features
⢠4.0 A Peak Drive Current
⢠Rise and Fall Times < 15 ns Typical into 6000 pF
⢠Propagation Delay from Inputs to Outputs < 20 ns
⢠Adaptive Nonoverlap Time Optimized for Large Power MOSFETs
⢠Floating Top Driver Accommodates Applications Up to 25 V
⢠Undervoltage Lockout to Prevent Switching when the Input
Voltage is Low
⢠Thermal Shutdown Protection Against Overtemperature
⢠< 1.0 mA Quiescent Current â Enabled
⢠25 mA Quiescent Current â Disabled
⢠Internal TG to DRN Pulldown Resistor Prevents HV SupplyâInduced
Turn On of HighâSide MOSFET
http://onsemi.com
8
1
1
SOâ8
D SUFFIX
CASE 751
QFNâ10
MN SUFFIX
CASE 485C
MARKING
DIAGRAMS
8
5351
ALYW
1
10
5351
ALYW
1
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
PIN CONNECTIONS
1
DRN
TG
BST
CO
SOâ8
8
PGND
BG
VS
EN
1
DRN
TG
N/C
BST
CO
QFNâ10
10
GND
BG
N/C
VS
EN
© Semiconductor Components Industries, LLC, 2004
June, 2004 â Rev. 9
ORDERING INFORMATION
Device
Package
Shippingâ
NCP5351D
SOâ8
98 Units/Rail
NCP5351DR2
SOâ8 2500 Tape & Reel
NCP5351MNR2 QFNâ10 2500 Tape & Reel
â For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
1
Publication Order Number:
NCP5351/D
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