Linear Technology will demonstrate high performance analog technology and new power products at APEC 2015. Featured will be Linear Technology’s digital power system management (PSM) products for controlling and monitoring power supplies. Linear will also demo a new family of buck-boost µModule® regulators that simplify complex power circuits, and the LT8640, a 42V, 5A synchronous step-down switching regulator with Silent Switcher® architecture. The LT3042 20V, 200mA, ultralow noise, ultrahigh PSRR RF linear regulator will also be highlighted.
Linear Technology Corporation will also introduce a new high reliability and military temperature grade versions of its LTC4412, a robust "ideal diode" PowerPath™ controller. The LTC4412 permits low-loss ORing of multiple input DC power sources. 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 LTC4412 is guaranteed to meet performance specifications over a wide range of user conditions including an operating junction temperature range up to -55 C to 150 C across an operating voltage range of 2.5V to 28V.
The LTC4412 also provides reverse battery and MOSFET protection circuitry in a compact SOT package. 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 PowerPath switches, uninterruptible power supplies, backup battery systems, logic-controlled power switches, and automotive and industrial systems.
Multiple LTC4412 devices can be used to enable switchover between multiple batteries or charging of multiple batteries from a single charger. The LTC4412 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 devices's ultralow 11µA quiescent current is independent of the load current.
The LTC4412 is offered in a low-profile SOT-23 package. E and I grades feature an operating junction temperature range of -40°C to +85°C, high reliability H grades from -40°C to +150°C, and military MP grades from -55°C to +150°C. Devices are in stock and 1,000-piece pricing for the H grade starts at $1.85 each, and the MP grade starts at $3.65 each.
