Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3472
Edited by the Electronicstalk Editorial Team on 07 January 2005
Convertor is biased about CCD imagers
A novel dual-channel DC/DC convertor generates positive and negative outputs for biasing CCD imagers.
The LT3472 is a dual channel (boost/inverter), +34V, 1.1MHz DC/DC convertor that generates positive and negative outputs for biasing CCD imagers Its internal 350/400mA, +36V switches can deliver up to 20mA at 15V and 50mA at -8V from Li-ion batteries, providing bias for many popular CCD (charge-coupled device) imagers
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Its input voltage range of 2.2 to 16V enables inputs that range from Li-ion to multiple cell alkaline/NiMH batteries.
Switching at 1.1MHz, the LT3472 uses tiny, low profile capacitors and inductors and generates low noise outputs that are easy to filter.
Schottky diodes are internal and the output voltages are set with one resistor per channel, reducing external component count.
Packaged in a 3 x 3mm DFN, the entire solution has less than 1mm profile and occupies just 50mm2.
The LT3472 incorporates internal sequencing circuitry that disables the negative channel until the positive channel has reached 88% of its final value, ensuring that the sum of the two outputs is always positive.
Separate soft-start capacitors for each output allow the ramp of each output to be independently controlled.
The LT3472EDD is available from stock, price starting at $1.95 each for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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