DESCRIPTION
The LT ®1934 is a micropower step-down DC/DC converter with internal 400mA power switch, packaged in a low profile (1mm) ThinSOT. 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.

FEATURES
■ Wide Input Voltage Range: 3.2V to 34V
■ Micropower Operation: IQ = 12μA
■ 5V at 250mA from 6.5V to 34V Input (LT1934)
■ 5V at 60mA from 6.5V to 34V Input (LT1934-1)
■ 3.3V at 250mA from 4.5V to 34V Input (LT1934)
■ 3.3V at 60mA from 4.5V to 34V Input (LT1934-1)
■ Low Shutdown Current: <1μA
■ Low VCESAT Switch: 200mV at 300mA
■ Low Profi le (1mm) SOT-23 (ThinSOT™) and (2mm × 3mm × 0.8mm) 6-Pin DFN Package

APPLICATIONS
■ Wall Transformer Regulation
■ Automotive Battery Regulation
■ Standby Power for Portable Products
■ Distributed Supply Regulation
■ Industrial Control Supplies