LT1934 Datasheet | Linear Technology

.. LT1934/LT1934-1 Micropower Step-Down Switching Regulators in Thin SOT Features s s s s s s s s s DESCRIPTIO Wide Input Voltage Range: 3.2V to 34V Micropower Operation: IQ = 12µA 5V at 250m A from 6.5V to 34V Input (LT1934) 5V at 60m A from 6.5V to 34V Input (LT1934-1) 3.3V at 250m A from 4.5V to 34V Input (LT1934) 3.3V at 60m A from 4.5V to 34V Input (LT1934-1) Low Shutdown Current: <1µA Low VCESAT Switch: 200m V at 300m A Low Profile (1mm) SOT-23 (Thin SOTTM) Package U APPLICATIO S s s s s s The LT ®1934 is a micropower step-down DC/DC converter with internal 400m A power switch, packaged in a low profile (1mm) Thin SOT. With its wide input range of 3.2V to 34V, the LT1934 can regulate a wide variety of power sources, from 4-cell alkaline batteries and 5V logic rails to unregulated wall transformers and lead-acid batteries. Quiescent current is just 12µA and a zero current shutdown mode disconnects the load from the input source, simplifying power management in battery-powered systems. Burst Mode® operation and the low drop internal power switch result in high efficiency over a broad range of load current. The LT1934 provides up to 300m A of output current. The LT1934-1 has a lower current limit, allowing optimum choice of external ponents when the required output current is less than 60m A. Fast current limiting protects the LT1934 and external ponents against shorted outputs, even at 34V input. , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. Wall Transformer Regulation Automotive Battery Regulation Standby Power for Portable Products Distributed Supply Regulation Industrial Control Supplies TYPICAL APPLICATIO 3.3V Step-Down Converter D2 100 LT1934 VIN = 12V BOOST VIN 4.5V TO 34V VIN LT1934 SHDN GND FB SW 0.22µF EFFICIENCY (%) L1 47µH C2 2.2µF D1 10p F 1M VOUT 3.3V 250m A 80 VOUT...