MOSFET driver runs up to 4A

A new high-speed half-bridge N-channel MOSFET driver is optimised for use in high-frequency high-current single- or multiphase DC/DC convertors.

A new high-speed, half-bridge, N-channel mosfet driver IC is optimised for use in high-frequency, high-current, single- or multiphase DC/DC convertors for desktop and notebook computers and fixed telecomms systems.

The new SiP41101 mosfet driver works in systems with supply voltages from 4.5 up to 30V.

Designed to supply output currents up to 4A, the mosfet driver operates at switching frequencies of 250kHz to 1MHz with a driver impedance of only 0.5ohm, allowing it to be used effectively with low-on-resistance power mosfets.

An internal bootstrap diode, which allows the SiP41101 to drive an N-channel high-side mosfet, reduces external component count, and the SiP41101's internal break-before-make circuitry prevents shoot-through current in the external mosfets.

A synchronous enable control pin serves to disable the low-side or synchronous mosfet to maximise efficiency under low output current conditions.

The new mosfet driver's internal undervoltage lockout feature prevents driving of the mosfet gates when the supply voltage (at VDD) is less than is specified, thereby ensuring that output mosfets are only turned on when sufficient gate voltage is present.

The SiP41101 is delivered in a 16-pin TSSOP package and is rated for operation over an industrial temperature range of -40 to +85C.

Samples and production quantities of the SiP41101 are available now, with lead times of eight weeks for larger orders.

Pricing for US delivery starts at $0.85 in 10,000-piece quantities.

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