The LT3021IS8-1.8 is a very low dropout voltage (VLDO™) linear regulator that operates from input supplies down to 0.9V. This device supplies 500mA of output current with a typical dropout voltage of 160mV. The LT3021IS8-1.8 is ideal for low input voltage to low output voltage applications, providing comparable electrical efficiency to that of a switching regulator.
The LT3021IS8-1.8 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 3.3µF. Other LT3021IS8-1.8 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 LT3021IS8-1.8 is available as an adjustable output device with an output range down to the 200mV reference. Three fixed output voltages, 1.2V, 1.5V and 1.8V, are also available.
The LT3021IS8-1.8 regulator is available in the low profile (0.75mm) 16-pin (5mm × 5mm) DFN package with exposed pad and the 8-lead SO package.
Feature
- VIN Range: 0.9V to 10V
- Dropout Voltage: 160mV Typical
- Output Current: 500mA
- Adjustable Output (VREF = VOUT(MIN) = 200mV)
- Fixed Output Voltages: 1.2V, 1.5V, 1.8V
- Stable with Low ESR, Ceramic Output Capacitors (3.3µF Minimum)
- 0.2% Load Regulation from 0mA to 500mA
- Quiescent Current: 120µA (Typ)
- 3µA Typical Quiescent Current in Shutdown
- Current Limit Protection
- Reverse-Battery Protection
- No Reverse Current
- Thermal Limiting with Hysteresis
- 16-Pin DFN (5mm × 5mm) and 8-Lead SO Packages
Applications
- Low Current Regulators
- Battery-Powered Systems
- Cellular Phones
- Pagers
- Wireless Modems
