LT1121IST-3.3#TRPBF - Analog Devices Inc.

Manufacturer Part Number

LT1121IST-3.3#TRPBF

Manufacturer

Analog Devices

Introduction

Low Dropout Voltage Regulator with positive fixed output, designed for power-efficient applications.

Product Features and Performance

Positive fixed output voltage regulator

Input voltage up to 30V

Stable 3.3V output

Maximum voltage dropout of 0.7V at 150mA load

150mA output current capacity

Low quiescent current of 50 µA

Maximum supply current of 14 mA

Power supply rejection ratio (PSRR) of 58dB at 120Hz

Enable control feature for power saving

Over-temperature and reverse polarity protection

Product Advantages

Efficient low dropout performance for better power conservation

Long battery life due to low quiescent current

High PSRR ensures a stable output voltage against variations in input voltage

Protection features enhance reliability and safety of operation

Wide operating temperature range suitable for various environments

Key Technical Parameters

Input Voltage (Max): 30V

Output Voltage (Min/Fixed): 3.3V

Voltage Dropout (Max): 0.7V @ 150mA

Current - Output: 150mA

Quiescent Current (Iq): 50 µA

Supply Current (Max): 14 mA

Operating Temperature: -40°C to 125°C

Quality and Safety Features

Over Temperature Protection

Reverse Polarity Protection

Compatibility

Surface Mount compatible

Compatible with a variety of circuits requiring a fixed 3.3V with low dropout

Application Areas

Battery-powered devices

Portable electronics

Microcontroller power supply

Consumer electronics

Product Lifecycle

Status: Active

Not nearing discontinuation, with replacements or upgrades readily available

Several Key Reasons to Choose This Product

Suitable for sensitive electronics that require precise voltage regulation

Low dropout enhances efficiency, especially in battery-operated devices

Enable pin provides additional power-saving options

Robust protection features ensure long-term reliability

Wide operating temperature range allows use in diverse environments

Surface-mountable design facilitates automated manufacturing processes