LT3021 Datasheet | Linear Technology

Features n VIN Range: 0.9V to 10V n Dropout Voltage: 160m V Typical n Output Current: 500m A n Adjustable Output (VREF = VOUT(MIN) = 200m V) n Fixed Output Voltages: 1.2V, 1.5V, 1.8V n Stable with Low ESR, Ceramic Output Capacitors (3.3μF Minimum) n 0.2% Load Regulation from 0m A to 500m A n Quiescent Current: 120μA (Typ) n 3μA Typical Quiescent Current in Shutdown n Current Limit Protection n Reverse-Battery Protection n No Reverse Current n Thermal Limiting with Hysteresis n 16-Pin DFN (5mm × 5mm) and 8-Lead SO Packages APPLICATIONS n Low Current Regulators n Battery-Powered Systems n Cellular Phones n Pagers n Wireless Modems TYPICAL APPLICATION 1.8V to 1.5V, 500m A VLDO Regulator VIN 1.8V IN OUT 3.3μF LT3021-1.5 SHDN SENSE VOUT 1.5V 3.3μF 500m A 3021 TA01 LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 500m A, Low Voltage, Very Low Dropout Linear Regulator DESCRIPTION The LT®3021 is a very low dropout voltage (VLDO™) linear regulator that operates from input supplies down to 0.9V. This device supplies 500m A of output current with a typical dropout voltage of 160m V. The LT3021 is ideal for low input voltage to low output voltage applications, providing parable 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 3.3μF. Other LT3021 Features include 0.05% typical line regulation and 0.2% typical load regulation. In shutdown, quiescent current typically drops to 3μA. 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 device with an output range down to the 200m V reference. Three fixed output voltages, 1.2V, 1.5V and 1.8V, are also available. The LT3021 regulator is available in the low profile (0.75mm) 16-pin (5mm × 5mm) DFN package with exposed pad and the 8-lead SO package. L, LT, LTC and LTM are...