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MCP14628

Microchip Technology
Part Number MCP14628
Manufacturer Microchip Technology
Description 2A Synchronous Buck Power MOSFET Driver
Published Feb 11, 2010
Detailed Description MCP14628 2A Synchronous Buck Power MOSFET Driver Features • Dual Output MOSFET Driver for Synchronous Applications • Hig...
Datasheet PDF File MCP14628 PDF File

MCP14628
MCP14628

Overview
MCP14628 2A Synchronous Buck Power MOSFET Driver Features • Dual Output MOSFET Driver for Synchronous Applications • High Peak Output Current: 2A (typical) • Adaptive Cross Conduction Protection • Internal Bootstrap Blocking Device • +36V BOOT Pin Maximum Rating • Enhanced Light Load Efficiency Mode • Low Supply Current: 80 µA (typical) • High Capacitive Load Drive Capability: - 3300 pF in 10 ns (typical) • Tri-State PWM Pin for Power Stage Shutdown • Input Voltage Undervoltage Lockout Protection • Space Saving Packages: - 8-Lead SOIC - 8-Lead 3x3 DFN General Description The MCP14628 is a dual MOSFET gate driver designed to optimally drive two N-Channel MOSFETs arranged in a non-isolated synchronous buck converter topology.
With the capability to source 2A peaks typically from both the high-side and low-side drives, the MCP14628 is an ideal companion to buck controllers that lack integrated gate drivers.
Additionally, greater design flexibility is offered by allowing the gate drivers to be placed close to the power MOSFETs.
The MCP14628 features the capability to sink 3.
5A peak typically for the low-side gate drive.
This allows the MCP14628 the capability of holding off the low-side power MOSFET during the rising edge of the PHASE node.
Internal adaptive cross conduction protection circuitry is also used to mitigate both external power MOSFETs from simultaneously conducting.
The low resistance pull-up and pull-down drives allow the MCP14628 to quickly transition a 3300 pF load in typically 10 ns and with a propagation time of typically 20 ns.
Bootstrapping for the high-side drive is internally implemented which allows for a reduced system cost and design complexity.
The PWM input to the MCP14628 can be tri-stated to force both drive outputs low for true power stage shutdown.
Light load system efficiency is improved by using the diode emulation feature of the MCP14628.
When the FCCM pin is grounded, diode emulation mode is entered.
In this mode, discontinuous conduc...


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