STMicroelectronics L7824ABV-DG

Overview

L7824ABV-DG from STMicroelectronics is a three-terminal positive fixed-voltage linear regulator delivering 24 V ±2 % output at up to 1.5 A, with thermal overload, short-circuit, and safe operating area (SOA) protection. It operates across –40 °C to +125 °C junction temperature and requires minimum 5 mA load current. Used for local on-card regulation in industrial power supplies and embedded control systems.

For engineers reviewing the L7824ABV-DG datasheet, L7824ABV-DG pinout, L7824ABV-DG application, or L7824ABV-DG equivalent, key selection criteria include guaranteed extended-temperature operation, 2 V dropout at 1 A, 54 dB supply voltage rejection at 120 Hz, 20 mΩ output resistance, and TO-220FP package thermal performance (R_thJC = 5 °C/W).

Technical Context

This device implements a monolithic series-pass linear regulator architecture with internal current limiting, thermal shutdown, and SOA protection-enabling robust operation without external protection circuitry. Its fixed 24 V output is trimmed during manufacturing to ±2 % tolerance at 25 °C and maintains regulation over input voltages from 27.3 V to 38 V.

Designed for local point-of-load regulation, it eliminates single-point distribution losses and supports stable DC output under varying line (up to 240 mV line regulation) and load (up to 100 mV load regulation) conditions. Output noise is specified at 10 µV/√Hz (10 Hz–100 kHz), and quiescent current remains tightly controlled at 4.6–6 mA.

Key Specifications

Pinout & Package

Supplied in TO-220FP package: insulated tab, vertical mounting, 3-pin through-hole configuration with standard footprint and creepage clearance for industrial safety compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM7824CD2T and MC7824BD2TR4, L7824ABV-DG provides superior output accuracy (±2 % vs ±4 %), guaranteed operation down to –40 °C, and lower junction-to-case thermal resistance-making it optimal for thermally demanding, precision industrial applications where long-term stability is critical.

Availability

L7824ABV-DG is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, test equipment power supplies, and legacy sensor interface designs requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for L7824ABV-DG 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, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

L7824ABV-DG belongs to the L78 positive voltage regulator IC family-engineered for robust, low-cost, fixed-output local regulation in harsh environments where reliability, thermal resilience, and protection integration are prioritized over adjustable functionality.

FAQ

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

The minimum input voltage is 27.3 V under full-load (1 A) and 25 °C conditions, based on the 2 V dropout specification. At higher temperatures or loads approaching 1.5 A, derating is required-consult thermal data and ensure input remains ≥28 V to maintain regulation across the full –40 °C to +125 °C junction range.

Can L7824ABV-DG be used without a heatsink?

It can operate without a heatsink only at very low output currents (<150 mA) and ambient temperatures <40 °C. At 1 A and 25 °C ambient, power dissipation reaches ~22 W (assuming 35 V_IN), requiring a heatsink with ≤10 °C/W thermal resistance to keep junction temperature below 125 °C-verified using R_thJC = 5 °C/W and R_thCA estimates.

Does this regulator require input and output capacitors?

Yes: a 0.33 µF ceramic capacitor on the input and 0.1 µF ceramic capacitor on the output are mandatory for stability per the datasheet. Larger bulk capacitors (e.g., 10–100 µF electrolytic) may be added for transient response, but the specified ceramics must be placed within 5 mm of the respective pins to prevent oscillation.

How does the SOA protection differ from standard current limiting?

SOA (Safe Operating Area) protection dynamically limits power dissipation-not just current-to prevent second breakdown during high-voltage, high-current transients (e.g., load dump or start-up surge). Unlike simple foldback current limiting, it monitors V_CE × I_C in real time, enabling sustained 1.5 A delivery at low V_IN–V_OUT while clamping unsafe combinations at higher differentials.