3A, 0.95V to 10V, Very Low Dropout Linear Regulator with Programmable Current Limit

The LT3033 is a very low dropout voltage (VLDO™) linear regulator that operates from a single input supply down to 0.95V. The device supplies 3A output current with 95mV typical dropout voltage. The LT3033 is ideal for low input voltage to low output voltage applications, providing comparable electrical efficiency to a switching regulator.

The LT3033 optimizes stability and transient response with low ESR ceramic output capacitors as small as 10μF. Other features include programmable current limit, an output current monitor and a power good flag to indicate output voltage regulation. In shutdown, quiescent current typically drops to 22μA. Internal protection circuitry includes reverse-battery protection, current limiting with foldback, thermal limiting with hysteresis and reverse-current protection.

The LT3033 is available as an adjustable device with an output voltage down to the 200mV reference. The device is available in a thermally enhanced, low profile 3mm × 4mm × 0.75mm QFN package.

APPLICATIONS

* High Efficiency Linear Regulators

* Battery-Powered Systems

* Logic Supplies

* Post Regulator for Switching Supplies

* Wireless Modems

* FPGA Core Supplies

* Single Supply VIN Range: 0.95V to 10V

* Dropout Voltage: 95mV Typical

* Output Current: 3A

* Adjustable Output Voltage: 200mV to 9.7V

* Single Capacitor Soft-Starts Reference and Lowers Output Noise

* Stable with Low ESR, Ceramic Output Capacitors

* 0.075% Typical Load Regulation from 1mA to 3A

* Quiescent Current: 1.9mA Typical

* Quiescent Current in Shutdown: 22μA Typical