The LT3503EDCB is a current mode PWM step-down DC/DC converter with an internal 1.45A power switch. The wide operating input range of 3.6V to 20V makes the LT3503EDCB ideal for regulating power from a wide variety of sources. 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.
Feature
- Wide Input Range: 3.6V to 20V
- 5V at 1.2A from 11V to 18V Input
- 5V at 1A from 7.2V to 18V Input
- 3.3V at 1.2A from 8.5V to 12V Input
- 3.3V at 1A from 5.5V to 12V Input
- Fixed Frequency Operation: 2.2MHz
- Output Adjustable Down to 780mV
- Short-Circuit Robust
- Uses Tiny Capacitors and Inductors
- Soft-Start
- Internally Compensated
- Low Shutdown Current: <2µA
- Low VCESAT Switch: 400mV at 1A
- Thermally Enhanced, 2mm × 3mm 6-Pin DFN Low Profile Package
Applications
- Automotive Battery Regulation
- Industrial Control Supplies
- Wall Transformer Regulation
- Distributed Supply Regulation
- Battery-Powered Equipment
(Picture: Pinout)
