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RAA220002

Renesas
Part Number RAA220002
Manufacturer Renesas
Description Dual Synchronous Rectified Buck MOSFET Driver
Published Aug 5, 2020
Detailed Description Datasheet RAA220002 Dual Synchronous Rectified Buck MOSFET Driver The RAA220002 is a dual high frequency MOSFET driver...
Datasheet PDF File RAA220002 PDF File

RAA220002
RAA220002


Overview
Datasheet RAA220002 Dual Synchronous Rectified Buck MOSFET Driver The RAA220002 is a dual high frequency MOSFET driver designed to drive upper and lower power N-channel MOSFETs in a synchronous rectified buck converter topology.
The RAA220002’s upper and lower gates are both driven to an externally applied voltage, which provides the ability to optimize applications involving trade-offs between gate charge and conduction losses.
An advanced adaptive shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously and to minimize dead time.
The RAA220002 has a 10kΩ integrated high-side gate-to-source resistor to prevent self turn-on due to high input bus dV/dt.
The RAA220002’s overvoltage protection feature is operational while VCC is below the POR threshold.
The PHASE node is connected to the gate of the low-side MOSFET (LGATE) through a 30kΩ resistor, limiting the output voltage of the converter close to the gate threshold of the low-side MOSFET.
This is dependent on the current being shunted, which provides some protection to the load if the upper MOSFET(s) becomes shorted.
Applications • High light-load efficiency voltage regulators • Core regulators for advanced microprocessors • High current DC/DC converters Features • Dual independent MOSFET driver suitable for multi-phase DC/DC applications • Dual MOSFET drives for synchronous rectified bridge • Advanced adaptive zero shoot-through protection ○ PHASE detection ○ LGATE detection ○ Auto-zero of rDS(ON) conduction offset effect • Low standby bias current • 36V internal bootstrap switcher • Bootstrap capacitor overcharging prevention • Integrated high-side gate-to-source resistor to prevent self turn-on due to high input bus dV/dt • Pre-POR overvoltage protection for start-up and shutdown • Power rail undervoltage protection • Expandable bottom copper pad for enhanced heat sinking • Thin Dual Flat No-lead (TDFN) package • Near chip-scale package footprint; impro...



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