Semiconductor Components Industries, LLC, 2004
November, 2004 − Rev. 11
1 Publication Order Number:
NCP5351/D
NCP5351
4 A Synchronous Buck
Power MOSFET Driver
The NCP5351 is a dual MOSFET gate driver optimized to drive the
gates of both high−side and low−side 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 Semiconductor’s 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 A, 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 pin−to−pin compatible with the SC1205 and is
available in a standard SO−8 package and thermally enhanced
DFN−10.
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 − Enabled
• 25 A Quiescent Current − Disabled
• Internal TG to DRN Pulldown Resistor Prevents HV Supply−Induced
Turn On of High−Side MOSFET
• Pb−Free Package is Available
Device Package Shipping
†
ORDERING INFORMATION
SO−8
98 Units/Rail
SO−8
2500 Tape & Reel
NCP5351D
NCP5351DR2
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
MARKING
DIAGRAMS
PIN CONNECTIONS
SO−8
D SUFFIX
CASE 751
ENCO
18
V
S
BST
BGTG
PGNDDRN
http://onsemi.com
5351
ALYW
1
8
1
8
DFN−10
MN SUFFIX
CASE 485C
5351
ALYW
1
DRN
TG
N/C
BST
CO
GND
BG
EN
110
DFN−10
SO−8
1
10
DFN−10
(Pb−Free)
2500 Tape & Reel
NCP5351MNR2G
†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.
N/C
V
S
DFN−10
2500 Tape & Reel
NCP5351MNR2
