1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN

The LT3493-3 is a current mode PWM step-down DC/DC converter with an internal 1.75A power switch. The wide operating input range of 6.8V to 36V (40V maximum) makes the LT3493-3 ideal 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 mode provides output disconnect, enabling easy power management in battery-powered systems.

VIN Range

LT3493

3.6V to 36V Operating, 40V Maximum

LT3493-3

6.8V to 36V Operating, 40V Maximum

Applications

* Automotive Battery Regulation

* Industrial Control Supplies

* Wall Transformer Regulation

* Distributed Supply Regulation

* Battery-Powered Equipment

* Wide Input Range: 6.8V to 36V Operating, 40V Maximum

* 1.2A Output Current

* Fixed Frequency Operation: 750kHz

* Output Adjustable Down to 780mV

* Short-Circuit Robust

* Uses Tiny Capacitors and Inductors