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Linear Tech dc/dc converter measures <1.1mm

Posted: 18 Feb 2002 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? power conversion? dc converter? dc/dc converter? step up converter?

The LT1946A step-up dc/dc converter features a switching frequency of 2.7MHz, allowing the use of a 1.5?H inductorthereby enabling the entire package to measure <1.1mm.

The device incorporates a 1.5A, 36V internal switch and operates from an input voltage range of 2.6V to 16V. It can generate output voltages up to 34V and currents of 430mA at 8V from a 3.3V input, making it suitable for large TFT-LCDs.

Similar to the LT1946 (1.2MHz), soft-start is controlled with an external capacitor, which determines the input current ramp during start-up.

The LT1946A uses a constant frequency, current-mode control scheme to provide line and load regulation. Loop compensation can be either internal or external, giving the user flexibility in setting loop compensation and allowing transient response with low ESR ceramic output capacitors.

The LT1946A is available in a thermally-enhanced 8-lead MSOP housing. Pricing starts at $2.50 each in 1,000-piece quantities.

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