LT1934 Datasheet

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

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

The LT1934 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.

The LT1934 provides up to 300mA of output current. Fast current limiting protects the LT1934 and external components against shorted outputs, even at 34V input.