Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3844
Edited by the Electronicstalk Editorial Team on 24 July 2006
Controller optimises DC/DC designs
A 4 to 60V input range DC/DC controller with adjustable 100 to 500kHz switching frequency allows a power supply to be optimised for size and efficiency.
Linear Technology has introduced the LT3844, a 4 to 60V input range DC/DC controller with adjustable 100 to 500kHz switching frequency, which allows the power supply to be optimised for size and efficiency At faster switching frequencies users can implement a smaller inductor and capacitors, and at slower frequencies they can optimise efficiency
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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For noise sensitive application, the LT3844 can be synchronised to an external clock from 100 to 600kHz.
A versatile controller, the LT3844 can be used in several DC/DC topologies such as step-down, step-up, inverting and sepic (buck-boost).
In addition, the output voltage can be adjusted over a wide range from 1.23V to 36V.
Applications include automotive and heavy equipment systems with high voltage supplies, avionics and industrial power supplies.
The LT3844 is a current mode controller and drives an N-channel MOSFET.
It maintains high efficiency at light loads with its burst mode operation and 120uA quiescent current.
Current mode operation provides fast line and load transient response as well as cycle-by-cycle over current protection.
Additional system and IC protection features include short-circuit protection, adjustable soft-start, thermal shutdown and precision undervoltage lockout.
The LT3844 is offered in a 16-pin thermally enhanced TSSOP and is rated for -40 to +125C junction temperature operation.
1000-piece pricing starts at $3.10 each. Request a free brochure from Linear Technology Corp ...
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