LT1935 Datasheet | Linear Technology

LT1935 1.2MHz Boost DC/DC Converter in Thin SOT with 2A Switch Features - - - - - - - - - - - DESCRIPTIO 1.2MHz Switching Frequency High Output Voltage: Up to 38V Wide Input Range: 2.3V to 16V Low VCESAT Switch: 180m V at 2A Soft-Start Uses Small Surface Mount ponents 5V at 1A from 3.3V Input 12V at 600m A from 5V Input Low Shutdown Current: < 1µA Pin-for-Pin patible with the LT1613 and LT1930 Low Profile (1mm) SOT-23 (Thin SOTTM) Package The LT®1935 is the industry’s highest power SOT-23 switching regulator. Its unprecedented 2A, 40V internal switch allows high output currents to be generated in a small footprint. Intended for space-conscious applications, the LT1935 switches at 1.2MHz, allowing the use of tiny, low profile inductors and capacitors 2mm or less in height. The NPN switch achieves a VCESAT of just 180m V at 2A independent of supply voltage, resulting in high efficiency even at maximum power levels from a 3V input. A constant frequency, internally pensated, current mode PWM architecture results in low, predictable output noise that is easy to filter. Low ESR ceramic capacitors can be used on the output, further reducing noise to the millivolt level. The high voltage switch on the LT1935 is rated at 40V, making the device ideal for boost converters up to 38V as well as for single-ended primary inductance converter (SEPIC) and flyback designs. The device can generate 5V at up to 1A from a 3.3V supply or 5V at 550m A from four alkaline cells in a SEPIC design. The LT1935 is available in a 5-lead SOT-23 package. , LTC and LT are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. U APPLICATIO S - - - - - - - Digital Cameras Battery Backup LCD Bias Local 5V or 12V Supply PC Cards x DSL Power Supply TFT-LCD Bias Supply TYPICAL APPLICATIO VIN 5V 4.7µF ON OFF VIN LT1935 SHDN GND FB L1 4.2µH D1 VOUT 12V 600m A 85 80 EFFICIENCY (%) 84.5k 10µF 10k 75 70 65 60 D1: ON SEMI MBRM120...