Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC4414
Edited by the Electronicstalk Editorial
Team on 10 November 2005
Low loss PowerPath controller drives
large PFETs
Linear Technology has introduced the LTC4414, a robust 'ideal diode' PowerPath controller for driving large PFETs with substantial gate capacitance.
Linear Technology has introduced the LTC4414, a robust 'ideal diode' PowerPath controller for driving large PFETs with substantial gate capacitance The LTC4414 permits low-loss OR-ing of multiple input DC power sources
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Its 20mV forward voltage is at least 10 times lower than that of a Schottky diode.
As a result, the device increases efficiency by an order of magnitude, due to much lower power loss and less self-heating, in systems requiring automatic switching or load sharing between power sources.
The LTC4414 is guaranteed to meet performance specifications over a wide range of user conditions including an ambient temperature range of -40 to 125C and operating voltage range of 3V to 36V.
The LTC4414 also provides reverse battery, overcurrent and MOSFET protection circuitry in a small MSOP package.
In addition, the device offers a digital control input and an open-drain status output pin to simplify interfacing to a microcontroller.
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.
Multiple LTC4414 devices can be used to enable switch-over between multiple batteries or charging of multiple batteries from a single charger.
The LTC4414 status pin (STAT) can be used to control a second P-channel MOSFET power switch so that both Schottky diodes are eliminated from the diode-OR circuit.
The IC's ultra low 30uA quiescent current is independent of the load current.
In addition, the LTC4414 utilises a strong gate drive for gate turn-on and turn-off times of 600us and 20us, respectively.
The LTC4414 is offered in an 8-lead MSOP package.
The 1000-piece price starts at $1.85 each. Request a free brochure from Linear Technology Corp ...
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