MOSFET Driver Flaunts 100% Duty Cycle Capability

Full duty-cycle capabilities, the LTC7003 high speed, high side N-channel MOSFET driver operates with supply voltages up to a 60V. Its internal charge pump enhances an external N-channel MOSFET switch, enabling it to remain on indefinitely. The device’s 1Ω gate driver can drive large gate capacitance MOSFETs with very short transition times and 35-ns propagation delays, making it viable for both high frequency switching and static switch applications.

 

The LTC7003 operates over a 3.5V to 60V (65V abs max) input supply range with a 3.5V to 15V driver supply range. It detects an overcurrent condition by monitoring the voltage across an external sense resistor placed in series with the drain of the external MOSFET switch. When the LTC7003 senses that the switch current has exceeded a preset level, a fault flag is asserted and the switch is turned off for a period of time set by an external timing capacitor. After a predetermined cooldown time period, the LTC7003 automatically retries.

 

The LTC7003 is designed to receive a ground-referenced, low voltage digital input signal and quickly drive a high side N-channel power MOSFET whose drain can be as high as 60V above ground. The fast 13ns rise and fall times, when driving a 1000pF load, minimize switching losses. The LTC7003 features an adjustable current limit, a current monitoring output, and adjustable overvoltage lockout and enable inputs.

 

The LTC7003 is available in a MSOP-16 package. Three operating junction temperature grades are available, with extended and industrial versions from –40 to 125°C, a high temperature automotive version from –40°C to 150°C and a military grade from –55°C to 150°C. The 1,000-piece price starts at $2.30 each. For more information and a datasheet are available on the LTC7003 product page.

 

Linear Technology Corp.

Milpitas, CA.

800-454-6327

http://www.linear.com

 

Analog Devices Inc.

Norwood, MA

800-445-2564

781-329-4700

http://www.analog.com

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