Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3681
Edited by the Electronicstalk Editorial
Team on 19 December 2007
Low-power regulator protected against
transients
Step-down switching regulator is ideal for load dump and cold-crank conditions found in automotive applications.
Linear Technology has announced the LT3681, a 2A, 36V step-down switching regulator with Burst Mode operation to keep quiescent current under 50uA The LT3681 operates within an input range of 3.6 to 34V with transient protection to 36V, making it ideal for load dump and cold-crank conditions found in automotive applications
This article was originally published on Electronicstalk on 3 Oct 2008 at 8.00am (UK)
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Its 3.2A internal switch can deliver up to 2A of continuous output current to voltages as low as 1.26V.
Its integrated Schottky and boost diodes offer a very compact solution footprint required in automotive and telecomms applications.
The LT3681's Burst Mode operation offers ultralow quiescent current, well suited for applications such as automotive or telecom systems, which demand always-on operation and optimum battery life.
Switching frequency is user programmable from 300kHz to 2.8MHz, enabling the designer to optimise efficiency while avoiding critical noise-sensitive frequency bands.
The combination of its 3 x 4mm DFN-10 package, integrated diodes and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.
The LT3681 uses a high-efficiency 3.2A, 360mV saturation voltage switch, with the necessary boost diode, Schottky diode, oscillator, control and logic circuitry integrated into a DFN package.
Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV peak-peak.
Special design techniques enable high efficiency over a wide input voltage range and the device's current mode topology ensures fast transient response and excellent loop stability.
The LT3681 also includes a power good flag and soft-start capability.
Pricing for the LT3681EDE starts at US $3.65 each, for 1000-piece quantities and the device is available from stock. Request a free brochure from Linear Technology Corp ...
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