STMicroelectronics L7824ABV

Overview

L7824ABV from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 24 V output with ±2 % tolerance, 1.5 A maximum output current, thermal overload and short-circuit protection, and operation across –40 °C to +125 °C junction temperature-used for stable local regulation in industrial power supplies and embedded control systems.

For engineers reviewing the L7824ABV datasheet, L7824ABV pinout, L7824ABV application, or L7824ABV equivalent, key selection considerations include dropout voltage (2 V at 1 A), line regulation (14–120 mV over 30–36 V input), load regulation (≤100 mV from 5 mA to 1.5 A), and thermal resistance (5 °C/W junction-to-case in TO-220FP package).

Technical Context

The L7824ABV implements a monolithic series-pass transistor architecture with internal current limiting, safe operating area (SOA) protection, and thermal shutdown circuitry-ensuring fault resilience without external components. Its feedback loop maintains output stability under varying load and line conditions within its specified operating range.

Designed for fixed-output use, it requires only two external capacitors (0.33 µF input, 0.1 µF output) for stability per standard test circuits. It does not support adjustable output via external resistors unless modified with external pass elements and compensation networks.

Key Specifications

Pinout & Package

Supplied in TO-220FP package (3-pin, vertical mounting, isolated tab), with pin 1 = Input, pin 2 = Ground, pin 3 = Output. The metal tab is electrically connected to ground and serves as thermal interface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output linear regulator applications.

Compared with LM7824CT and MC7824BD2TR4, the L7824ABV offers tighter initial tolerance and guaranteed extended temperature operation in TO-220FP-a balanced choice for industrial reliability without package redesign.

Availability

L7824ABV is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, test equipment power supplies, and factory automation sensors requiring stable component supply and long-term lifecycle support.

Supply support for L7824ABV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The L78 series belongs to ST's legacy linear regulator product line, engineered for robustness and ease-of-use in fixed-voltage local regulation-targeting cost-sensitive, high-reliability applications where simplicity and fault tolerance are critical.

FAQ

What is the minimum input voltage required for stable 24 V output from the L7824ABV?

The minimum input voltage is 26 V DC, derived from the 2 V dropout voltage specification at 1 A load and 25 °C. At higher temperatures or loads approaching 1.5 A, derating is required-consult thermal data (R_thJA = 60 °C/W for TO-220FP) to ensure junction temperature remains ≤125 °C.

Can the L7824ABV be used without input and output capacitors?

No-STMicroelectronics specifies mandatory 0.33 µF input and 0.1 µF output ceramic capacitors placed adjacent to the device pins. Omitting them risks oscillation, poor transient response, and potential instability, especially under dynamic load changes or long PCB traces.

Does the L7824ABV support reverse-polarity or surge protection?

No-the device lacks built-in reverse-voltage or surge protection. External components are required: a series diode (e.g., 1N5408) for reverse polarity blocking, and a parallel TVS (e.g., SMAJ24A) for transient suppression on the input rail, particularly in automotive or industrial environments.

How does the L7824ABV handle short-circuit conditions?

It limits short-circuit current to ~0.2 A (typical) while activating thermal shutdown if junction temperature exceeds safe limits. Recovery is automatic once fault is removed and temperature falls below threshold-no latch-up or manual reset required, enabling self-protecting behavior in field-deployed systems.