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LT1933 - 600mA, 500kHz Step-Down Switching Regulator in SOT-23

The LT1933 is a current mode PWM step-down DC/DC converter with an internal 0.75A power switch, packaged in a tiny 6-lead SOT-23. The wide input range of 3.6V to 36V makes the LT1933 suitable for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.

Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start up. The low current (<2µA) shutdown provides output disconnect, enabling easy power management in battery-powered systems.

Features Wide Input Range: 3.6V to 36V 5V at 600mA from 16V to 36V Input 3.3V at 600mA from 12V to 36V Input 5V at 500mA from 6.3V to 36V Input 3.3V at 500mA from 4.5V to 36V Input Fixed Frequency 500kHz Operation Uses Tiny Capacitors and Inductors Soft-Start Internally Compensated Low Shutdown Current: <2µA Output Adjustable Down to 1.25V Low Profile (1mm) SOT-23 (ThinSOT™) and (2mm x 3mm x 0.75mm) 6-Pin DFN Packages Typical Application

Applications Automotive Battery Regulation Industrial Control Supplies Wall Transformer Regulation Distributed Supply Regulation Battery-Powered Equipment Packaging

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