Texas Instruments

LP2992AIM5-3.3

LP2992AIM5-3.3 Description

The LP2992AIM5-3.3 is a fixed-output, low-dropout (LDO) linear voltage regulator from Texas Instruments, designed to deliver a stable 3.3V output at up to 250mA of load current. With a wide input voltage range of up to 16V, it is well-suited for applications requiring regulation from higher supply rails. The device features a low dropout voltage of 0.85V at 250mA, ensuring efficient operation even with marginal input headroom. Its 95 µA quiescent current and 4 mA maximum supply current make it ideal for power-sensitive designs. Although marked as obsolete, it remains a reliable choice for legacy systems due to its robust protection features, including over-current, over-temperature, and short-circuit protection.

LP2992AIM5-3.3 Features

• Fixed 3.3V Output: Ensures stable voltage regulation for sensitive circuitry.
• Low Dropout Voltage: 0.85V @ 250mA minimizes power dissipation.
• Low Quiescent Current: 95 µA enhances efficiency in battery-operated devices.
• Wide Input Range: Supports up to 16V, accommodating various power sources.
• Enable Control: Allows for power management via an external signal.
• Robust Protection: Includes over-current, over-temperature, and short-circuit safeguards.
• High PSRR: 45dB at 1kHz reduces noise for cleaner power delivery.
• Compact SOT23-5 Package: Ideal for space-constrained PCB designs.

LP2992AIM5-3.3 Applications

The LP2992AIM5-3.3 is particularly suited for:

• Portable Electronics: Battery-powered devices requiring efficient voltage regulation.
• Industrial Systems: Reliable power management in harsh environments.
• Automotive Electronics: Stable voltage supply for sensors and control modules.
• Embedded Systems: Low-noise power for microcontrollers and FPGAs.
• Legacy Equipment: Maintenance and repair of older systems where replacement is impractical.

Conclusion of LP2992AIM5-3.3

The LP2992AIM5-3.3 offers a balance of performance, efficiency, and reliability, making it a versatile choice for low-power, fixed-voltage applications. Its low dropout, high PSRR, and robust protection features distinguish it from basic LDOs, while its compact form factor ensures compatibility with space-limited designs. Although obsolete, its proven design and TI’s quality assurance make it a dependable option for legacy and niche applications. Engineers seeking a stable, low-quiescent LDO for 3.3V systems will find this regulator a practical solution.