Dual MOSFET drivers enhance MCU control and reduce footprint

Vishay Siliconix has introduced three half-bridge MOSFET-driver ICs with features to reduce external component count and to protect both internal circuitry and external MOSFETs.

The SiP41103, SiP41104 and SiP41105 are each capable of supplying 5V gate-drive signals at up to 1A to MOSFETs in 4.5V to 50V applications.

All three devices feature break-before-make logic to prevent shoot-through currents in the external MOSFETs and internal circuitry. A floating high-side driver, isolated from the substrate and supplied through internal bootstrap circuitry, allows direct-drive of an N-channel high-side MOSFET to further reduce overall component count.

The SiP41103 and SiP41105 provide a synchronous Enable pin and adjustable highside propagation delay. The SiP41105 also has a Shutdown pin allowing an MCU to turn off the driver directly. All devices feature Under-Voltage Lockout (UVLO) to prevent MOSFET turn-on when the supply voltage is less than specified.

To integrate easily with systems that require frugal power management, the drivers all feature shutdown modes that reduce the stand-by current to less than 5µA.

 

FEATURES Switching-frequency range: 250kHz to 1MHz Operating-temperature range: -40°C to 85°C Package options: SiP41103: MLP33-10 SiP41104: SO-8 SiP41105: TSSOP-16 PowerPAK®

APPLICATIONS Multi-phase DC/DC converters High-current synchronous buck converters High-frequency synchronous buck converters Asynchronous-to-synchronous adapters

 

 

www.vishay.com/mosfets/