Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3493
Edited by the Electronicstalk Editorial Team on 12 June 2006
Step-down convertor has wide input range
A current mode PWM step-down DC/DC convertor features an internal 1.4A power switch, packaged in a tiny 6-pin 2x 3mm DFN.
Linear Technology has announced the LT3493, a current mode PWM step-down DC/DC convertor with an internal 1.4A power switch, packaged in a tiny 6-pin 2 x 3mm DFN Its wide input range of 3.6 to 36V and capability of withstanding 40V transients makes the LT3493 suitable for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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For automotive applications, it can easily operate with sub-4V inputs which is essential for automotive "cold crank" requirements.
Its 750kHz operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
The LT3493's low collector-emitter saturation voltage (330mV at 1A) internal switch offers efficiencies as high as 89% and the device can generate outputs as low as 0.78V.
Internal cycle-by-cycle current limit provides protection against shorted outputs while soft-start eliminates input current surge during start up.
The low current (sub-2uA) shutdown provides easy power management in battery-powered systems.
The LT3493EDCB is available from stock in a thermally enhanced 2 x 3mm DFN-6 package.
A higher industrial temperature grade version, the LT3493IDCB, is also available from stock.
Pricing starts at $2.65 each and $3.18 each, respectively, for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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