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LT1763MPDE-3.3

LT1763MPDE-3.3 Description

The LT1763MPDE-3.3 is a high-performance, low-dropout (LDO) linear voltage regulator from Analog Devices Inc., designed to deliver a fixed 3.3V output with a maximum current of 500mA. This regulator operates with an input voltage range up to 20V, making it suitable for a wide variety of power supply applications. The device features a low dropout voltage of 0.45V at 500mA, ensuring efficient operation even with minimal headroom. With a quiescent current of just 75 µA and a power supply rejection ratio (PSRR) of 65dB at 120Hz, the LT1763MPDE-3.3 excels in noise-sensitive environments.

LT1763MPDE-3.3 Features

• Fixed 3.3V Output: Stable and precise voltage regulation for 3.3V systems.
• Low Dropout Voltage: 0.45V @ 500mA maximizes efficiency in low-input-voltage scenarios.
• High PSRR (65dB): Superior noise rejection for sensitive analog and digital circuits.
• Low Quiescent Current (75 µA): Ideal for battery-powered and energy-efficient designs.
• Protection Features: Includes over-current, over-temperature, and reverse-polarity protection for enhanced reliability.
• Enable Control: Allows for power management via an external enable pin.
• Surface-Mount Package (12DFN): Compact form factor suitable for space-constrained applications.

LT1763MPDE-3.3 Applications

The LT1763MPDE-3.3 is particularly well-suited for:

• Portable and Battery-Powered Devices: Due to its low quiescent current and dropout voltage, it is ideal for smartphones, tablets, and IoT devices.
• Noise-Sensitive Analog Circuits: High PSRR makes it perfect for RF, audio, and precision measurement equipment.
• Industrial and Automotive Systems: Robust protection features ensure reliability in harsh environments.
• Embedded Systems: Provides stable power for microcontrollers, FPGAs, and sensors.

Conclusion of LT1763MPDE-3.3

The LT1763MPDE-3.3 stands out as a high-efficiency, low-noise LDO regulator with robust protection mechanisms. Its combination of low dropout, high PSRR, and ultra-low quiescent current makes it a superior choice for applications demanding precision and reliability. While the product is now marked as obsolete, its performance characteristics continue to make it a preferred option for legacy designs or systems requiring proven stability. Engineers should consider alternative models from Analog Devices for new designs while leveraging the LT1763MPDE-3.3's strengths in existing implementations.