LT3021 Very Low Dropout (VLDO™) Voltage Linear Regulator

Analog Devices' LT3021 VLDO linear regulator operates from input supplies down to 0.9 V while supplying 500 mA of output current with a typical dropout voltage of 160 mV. The device is ideal for low-input voltage to low-output voltage applications, providing comparable electrical efficiency to that of a switching regulator. The LT3021 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 3.3 µF. Other LT3021 features include 0.05% typical line regulation and 0.2% typical load regulation. In shutdown, quiescent current typically drops to 3 µA.

Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting with hysteresis, and reverse-current protection. The LT3021 is available as an adjustable output as well as three fixed output voltages, 1.2 V, 1.5 V, and 1.8 V. The regulator is available in both DFN and SO packages. The LT3021 is perfect for handheld battery applications found in industrial and customer designs.