STMicroelectronics

L7924CV

L7924CV Description

The L7924CV from STMicroelectronics is a fixed-output negative voltage regulator designed to deliver a stable -24V output with a 1.5A current capacity. Housed in a TO-220AB package, this through-hole-mount IC is engineered for robust performance in demanding environments, operating within a temperature range of 0°C to 125°C. With a low dropout voltage of 1.1V (typical at 1A) and quiescent current of 3 mA, it ensures efficient power management while minimizing heat dissipation. The device incorporates over-temperature and short-circuit protection, enhancing reliability in fault conditions. Although marked as obsolete, it remains a viable choice for legacy systems due to its ROHS3 compliance and REACH-unaffected status.

L7924CV Features

• Fixed -24V Output: Ensures precise voltage regulation for negative rail applications.
• High Current Capacity: Supports up to 1.5A output current, suitable for powering medium-load circuits.
• Low Dropout Voltage: 1.1V (typical at 1A) minimizes power loss and improves efficiency.
• Built-in Protections: Over-temperature and short-circuit safeguards enhance system durability.
• Wide Operating Temperature: Functions reliably from 0°C to 125°C, ideal for industrial environments.
• Low Quiescent Current: 3 mA reduces standby power consumption.
• High PSRR: 60dB at 120Hz ensures excellent noise suppression for sensitive analog circuits.

L7924CV Applications

The L7924CV excels in systems requiring stable negative voltage rails, such as:

• Industrial Power Supplies: For motor drives, PLCs, and control systems.
• Audio Amplifiers: Provides clean negative bias voltage for op-amps and audio ICs.
• Test & Measurement Equipment: Ensures accurate voltage references in lab instruments.
• Legacy Electronics: Suitable for maintaining or repairing older designs where modern alternatives are incompatible.

Conclusion of L7924CV

The L7924CV is a dependable negative voltage regulator offering a balance of high current output, low dropout, and robust protections. While obsolete, its wide operating range and compliance with environmental standards make it a pragmatic choice for industrial, audio, and legacy applications. Engineers seeking a cost-effective, high-performance solution for negative voltage regulation will find the L7924CV a compelling option, particularly in systems where reliability under thermal stress is critical.