recently introduced the LTC4414, an "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. Its 20mV forward voltage is said to be 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.
Linear says the LTC4414 is guaranteed to meet performance specifications over a wide range of user conditions including an ambient temperature range of –40 degrees C to 125 degrees C 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 switchover 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 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 eight-lead MSOP package. The 1,000-piece price starts at $1.85 each.
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Where will all the raw materials come from for the manufacturing process? How will they be transported to the factory and what is going to be done with the various scrap and residues?