LT3493-3 Datasheet | Linear Technology

LT3493-3 1.2A, 750k Hz Step-Down Switching Regulator in 2mm × 3mm DFN Features - - - - - - - - - - - DESCRIPTIO Wide Input Range: 6.8V to 36V Operating, 40V Maximum 1.2A Output Current Fixed Frequency Operation: 750k Hz Output Adjustable Down to 780m V Short-Circuit Robust Uses Tiny Capacitors and Inductors Soft-Start Internally pensated Low Shutdown Current: <2µA Low VCESAT Switch: 330m V at 1A Thermally Enhanced, Low Profile 2mm × 3mm DFN-6 Package The LT®3493-3 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. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. U APPLICATIO S - - - - - Automotive Battery Regulation Industrial Control Supplies Wall Transformer Regulation Distributed Supply Regulation Battery-Powered Equipment .. TYPICAL APPLICATIO 3.3V Step-Down Converter VIN 6.8V TO 36V ON OFF VIN SHDN BOOST LT3493-3 SW 0.1µF 10µH 32.4k 22p F VOUT 3.3V 1.2A, VIN > 12V 1.1A, VIN > 8V EFFICIENCY (%) 85 80 75 70 65 60 10µF 10k 1µF 3493-3...