The LT®
1946 is a fixed frequency step-up DC/DC converter
containing an internal 1.5A, 36V switch. Capable of generating 8V at 430mA from a 3.3V input, the LT1946 is ideal
for large TFT-LCD panel power supplies. The LT1946
switches at 1.2MHz, allowing the use of tiny, low profile
inductors and low value ceramic capacitors. Loop compensation can be either internal or external, giving the user
flexibility in setting loop compensation and allowing optimized transient response with low ESR ceramic output
capacitors. Soft-start is controlled with an external capacitor, which determines the input current ramp rate during
start-up.
The 8-lead MSOP package and high switching frequency
ensure a low profile overall solution less than 1.2mm high.
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