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NCP5351

ON Semiconductor
Part Number NCP5351
Manufacturer ON Semiconductor
Description 4A Synchronous Buck Power MOSFET Driver
Published Feb 9, 2006
Detailed Description NCP5351 4 A Synchronous Buck Power MOSFET Driver The NCP5351 is a dual MOSFET gate driver optimized to drive the gates ...
Datasheet PDF File NCP5351 PDF File

NCP5351
NCP5351

Overview
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 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 pin−to−pin compatible with the SC1205 and is available in a standard SO−8 package and thermally enhanced DFN10.
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 mA Quiescent Current − Disabled • Internal TG to DRN Pulldown Resistor Prevents HV Supply−Induced Turn On of High−Side MOSFET • Pb−Free Package is Available http://onsemi.
com 8 1 SO−8 D SUFFIX CASE 751 MARKING DIAGRAMS 8 5351 ALYW G 1 DFN10 1 5351 MN SUFFIX 1 CASE 485C ALYWG G A = Assemb...


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