LT3461A Datasheet

• Integrated Schottky Rectifier
• Fixed Frequency 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

• Digital Cameras
• CCD Bias Supply
• XDSL Power Supply
• TFT-LCD Bias Supply
• Local 5V or 12V Supply
• Medical Diagnostic Equipment
• Battery Backup

The 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 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 LT3461A is rated at 40V making the device ideal for boost converters up to 38V.

The LT3461A are available in a low profile (1mm) SOT-23 package.