特点
Integrated Schottky Rectifier
Fixed Frequency 1.3MHz/3MHz Operation
High Output Voltage: Up to 38V
Low V
CESAT
Switch: 260mV at 250mA
12V at 70mA from 5V Input
5V at 115mA from 3.3V Input
Wide Input Range: 2.5V to 16V
Uses Small Surface Mount Components
Low Shutdown Current: <1μA
Soft-Start
Low Profile (1mm) SOT-23 (ThinSOT
TM
) Package
典型应用
典型应用
描述
The LT ? 3461/LT3461A are general purpose fixed frequency current mode step-up DC/DC converters. Both devices feature an integrated Schottky and a low V CESAT switch allowing a small converter footprint and lower parts cost. The LT3461 switches at 1.3MHz while the LT3461A switches at 3MHz. These high switching frequencies enable the use of tiny, low cost and low height capacitors and inductors. The constant switching frequency results in predictable output noise that is easy to filter, and the inductor based topology ensures an input free from switching noise typically present with charge pump solutions. The high voltage switch in the LT3461/LT3461A is rated at 40V making the device ideal for boost converters up to 38V.
The LT3461/LT3461A are available in a low profile (1mm) SOT-23 package.