Linear offers ten times forward voltage of Schottky diode

Sept. 26, 2005
Device designed to drive large PFETs with substantial gate capacitance provides low OR-ing of multiple DC power sources.

Linear Technology has launched the LTC4414, which it describes as a robust ‘ideal diode’ power path controller for driving large PFETs with substantial gate capacitance. The LTC4414 permits low-loss OR-ing of multiple input DC power sources, while its 20mV forward voltage is said to be at least ten times lower than that of a Schottky diode.

As a result, the device increases efficiency in systems requiring automatic switching or load sharing between power sources through lower power loss and less self-heating. The LTC4414 is guaranteed to meet performance specifications over a range of conditions including an ambient temperature range of -40°C to 125°C and operating voltage range of 3V to 36V.

The LTC4414 provides reverse battery, overcurrent and MOSFET protection circuitry in a small MSOP package and a digital control input and open-drain status output pin simplifies interfacing with a microcontroller.

Multiple LTC4414 devices can be used to enable switchover between multiple batteries or charging of multiple batteries from a single charger. Applications include systems that typically take power from multiple input sources, including high current power path switches, uninterruptible power supplies, backup battery systems, logic-controlled power switches and automotive and industrial systems.

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