LT1521CST-3.3#TRPBF - Analog Devices Inc.

Manufacturer Part Number

LT1521CST-3.3#TRPBF

Manufacturer

Analog Devices

Introduction

The LT1521CST-3.3#TRPBF is a low dropout (LDO) linear regulator specifically designed for Power Management applications, encapsulated in a surface mount TO-261-4, TO-261AA package.

Product Features and Performance

Output Voltage: Fixed at 3.3V

Input Voltage: Up to 20V

Low Dropout Voltage: 0.75V at 300mA load

Output Current: 300mA

Low Quiescent Current: 25 µA

High PSRR: 58 dB at 120Hz

Enables efficient regulation with higher input voltages

Product Advantages

High Output Voltage Accuracy

Stability with low ESR output capacitors

Thermal and Over Current Protection enhances safety

Reverse Polarity Protection increases robustness

Low quiescent current aids in power saving

Key Technical Parameters

Voltage - Input (Max): 20V

Voltage - Output (Min/Fixed): 3.3V

Current - Output: 300mA

Voltage Dropout (Max): 0.75V @ 300mA

Current - Quiescent (Iq): 25 µA

PSRR: 58dB (120Hz)

Quality and Safety Features

Over Temperature Protection

Over Current Protection

Reverse Polarity Protection

Compatibility

Designed for generic power supply applications

Compatible with low ESR capacitors

Application Areas

Consumer Electronics

Telecommunication Systems

Portable battery-powered equipment

Product Lifecycle

Status: Active

Not nearing discontinuation

Replacements or upgrades generally available

Several Key Reasons to Choose This Product

Maintains a steady 3.3V output with input fluctuations up to 20V

Low dropout voltage ideal for low voltage operations

Extended operational temperature range from 0°C to 125°C suitable for various environments

Minimizes power loss with low quiescent current when idle

High PSRR of 58 dB ensures output stability under varying loads and input disturbances

Offers added safety features such as thermal shutdown and current limit protection to safeguard components.