Low Dropout Linear Regulator LT3022 Characteristics/Typical Applications

describe

The LT®3022 is a very low dropout voltage (VLDO ^{TM ) linear regulator that operates from a single input supply as low as 0.9V. The device can provide up to 1A of output current with a typical dropout voltage of 145mV. The LT3022} is ideal for low input voltage to low output voltage applications, providing electrical efficiency comparable to switching regulators. The regulator optimizes stability and transient response with low ESR ceramic output capacitors as small as 10μF. Other features of the LT3022 include 0.05% typical line regulation and 0.05% typical load regulation. In shutdown mode, quiescent current typically drops to 7.5μA. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting with hysteresis, and reverse current protection.

The LT3022 is available as an adjustable device with an output voltage range as low as a 200mV reference. Three fixed output voltages are also available: 1.2V, 1.5V, 1.8V. The LT3022 regulator is available in thermally enhanced low profile (0.75mm height) 16-lead (5mm x 3mm) DFN and MSOP packages.

Encapsulation

Features

● V _IN range: 0.9V to 10V

● Dropout voltage: 145mV (typical)

Output current: 1A

● Adjustable output (V _REF = V _OUT(MIN) = 200mV)

● Fixed output voltage: 1.2V, 1.5V, 1.8V

● Stable with low ESR, ceramic output capacitors (10μF minimum)

● 0.05% typical load regulation (from 1mA to 1A)

● Quiet current: 400μA (typical)

● Typical quiescent current in shutdown mode is 7.5μA

● Current limiting protection

● Reverse battery protection (no reverse current)

Thermal limiting with hysteresis

● 16-pin (5mm x 3mm) DFN and MSOP packages

Typical Applications

application

● High efficiency linear regulator

Battery powered system

● Logic power supply

● Post regulator for switching power supplies

Wireless modem

● FPGA core power supply