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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

STMicroelectronics L7824ACV-DG

Name: L7824ACV-DG
Brand: STMicroelectronics
SKU: L7824ACV-DG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L7824ACV-DG

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-220-3

Datasheet:: L7824ACV-DG.pdf

Description:: IC REG LINEAR 24V 1.5A TO220

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Product details

Overview

L7824ACV-DG from STMicroelectronics is a three-terminal positive fixed-voltage linear regulator delivering 24 V ±2 % at up to 1.5 A output current, featuring thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It operates across 0 to 125 °C junction temperature range and requires minimum 5 mA load for regulation-commonly used in industrial power supplies, embedded control modules, and local on-card DC-DC conversion where stable high-voltage rail generation is critical.

For engineers reviewing the L7824ACV-DG datasheet, L7824ACV-DG pinout, L7824ACV-DG application, or L7824ACV-DG equivalent, key selection considerations include dropout voltage (2 V @ 1 A), line/load regulation performance (≤240 mV/≤100 mV), supply voltage rejection (54 dB @ 120 Hz), thermal resistance (R_thJC = 5 °C/W in TO-220FP), and guaranteed extended temperature operation.

Technical Context

This IC implements a monolithic series pass transistor with internal current limiting, thermal shutdown, and SOA protection-enabling robust operation without external protection circuitry. Its architecture relies on a bandgap reference and error amplifier driving a Darlington-connected pass element, optimized for low-noise (10 µV/√Hz) and stable regulation under varying line and load conditions.

Designed for fixed-output use, it supports external adjustment via feedback resistors but is not internally programmable. Input voltage range is 26.7–38 V DC for 24 V output, with dropout defined at 2 V; ripple rejection degrades above 1 kHz, making it unsuitable for high-frequency switching noise suppression without additional filtering.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	24 V ±2 % (23.5–24.5 V at 25 °C; 23–25 V over full load/temp range)
Max Output Current	1.5 A continuous-requires heatsink for sustained >1 A operation due to thermal limits
Dropout Voltage	2 V @ 1 A, 25 °C-dictates minimum input of 26 V for reliable 24 V output
Line Regulation	14–240 mV over VI = 26.7–38 V-specifies sensitivity to input ripple/noise
Load Regulation	10–100 mV over IO = 5 mA–1.5 A-defines output stability across dynamic load steps
Supply Rejection	54 dB @ 120 Hz-limits AC component from unregulated input (e.g., rectified AC)
Quiescent Current	4.6–6 mA-impacts no-load power loss in battery-backed or standby systems
Thermal Range	0 to 125 °C junction-validates use in non-automotive industrial environments

Pinout & Package

Supplied in TO-220FP package-a 3-pin, through-hole, insulated case variant with vertical mounting and integrated heat slug. Pin 1 is Input, Pin 2 is Ground, Pin 3 is Output; case is electrically connected to Pin 2 (Ground).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Input)	Unregulated DC input connection	Accepts 26.7–38 V DC; must be decoupled with ≥0.33 µF ceramic near pin
Pin 2 (Ground)	Reference and return path	Common node for input/output capacitors and load return; case tied to this pin
Pin 3 (Output)	Regulated 24 V output	Delivers up to 1.5 A; requires ≥0.1 µF ceramic capacitor at pin for stability

Key Features

Feature	Design Value
Fixed 24 V output with 2 % tolerance	Eliminates need for external feedback network-reduces BOM count and layout complexity
Integrated thermal shutdown	Automatically disables output above ~150 °C junction temp-prevents permanent damage during overload
Short-circuit current limiting	Clamps output to ~0.2 A during hard fault-enables safe recovery without external fuse
Safe Operating Area (SOA) protection	Prevents secondary breakdown of pass transistor during transient overloads or capacitive loads
Low output noise (10 µV/VO)	Minimizes interference in analog signal chains or precision sensor interfaces powered from this rail

Applications

Industrial PLC Power Supply

Test Equipment Bias Rail

Use Scenario: Provides isolated +24 V rail for digital I/O modules in programmable logic controllers operating in factory-floor environments with ambient temperatures up to 70 °C.

IC Role / Device Role / Timing Role: Local point-of-load regulator converting 36 V DC bus to clean, protected 24 V for logic-level interface circuits.

Use Value: Thermal and short-circuit protection ensures uptime during field wiring faults; 2 % tolerance meets IEC 61000-4-30 Class A voltage accuracy requirements.

Use Scenario: Supplies stable 24 V to op-amp bias networks and DAC reference buffers in benchtop multimeters and signal generators.

IC Role / Device Role / Timing Role: Low-noise post-regulator following a switching pre-regulator, reducing switching ripple before sensitive analog stages.

Use Value: 10 µV/VO noise density preserves measurement resolution; 54 dB SVR attenuates residual 120 Hz ripple from front-end rectification.

Motor Drive Control Board

Legacy Industrial Sensor Interface

Use Scenario: Powers gate drivers and microcontroller peripherals on a 24 V motor control board exposed to vibration and EMI in HVAC blower systems.

IC Role / Device Role / Timing Role: Primary 24 V regulator for logic and isolation supply domains-co-located with MCU and optocouplers.

Use Value: SOA protection prevents failure during inductive kickback transients; TO-220FP's insulated case avoids chassis grounding conflicts.

Use Scenario: Replaces aging discrete regulators in 4–20 mA transmitter modules requiring long-term reliability and minimal recalibration.

IC Role / Device Role / Timing Role: Fixed-voltage source for current-loop excitation circuitry and analog front-end amplifiers.

Use Value: -1.5 mV/°C drift enables <±0.5 % full-scale error over 0–70 °C ambient-meeting legacy calibration intervals.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM7824CDT/NOPB	2 % tolerance, 1.5 A rating, but only rated for 0–125 °C (no extended temp grade); R_thJA = 65 °C/W vs. 60 °C/W for L7824ACV-DG	Lacks guaranteed performance at cold start (-40 °C) and exhibits higher thermal resistance-less suitable for sealed enclosures	Select when cost is primary constraint and ambient stays >0 °C with adequate airflow
MC7824ACT	Same 24 V/1.5 A spec, but TO-220 package (non-insulated case); no A-grade temp support-only commercial 0–70 °C	Case tied to ground pin-requires isolation hardware if mounting to conductive chassis; limited to benign environments	Choose only for non-isolated, cost-sensitive consumer-grade designs with no thermal or safety certification needs

Compared with LM7824CDT/NOPB and MC7824ACT, L7824ACV-DG offers superior thermal performance in insulated packaging and guaranteed operation across the full industrial temperature range-critical for designs requiring long-term reliability without derating.

Availability

L7824ACV-DG is available at Aetrix Electronics and suitable for industrial PLC power supplies, test equipment bias rails, motor drive control boards, and legacy sensor interfaces requiring stable component supply with full traceability and lifecycle continuity.

Supply support for L7824ACV-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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

L7824ACV-DG belongs to the L78 positive voltage regulator IC family-designed specifically for robust, low-cost, fixed-output local regulation in industrial and embedded systems where simplicity, protection, and thermal resilience are prioritized over efficiency or programmability.

FAQ

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

The minimum input voltage is 26.7 V DC under full-load (1 A) and worst-case temperature conditions, based on the 2 V dropout specification. At light loads (<50 mA), input may drop to ~26 V, but design margin requires ≥27 V to ensure regulation across line, load, and temperature extremes per Table 9 in DS0422 Rev 38.

Can L7824ACV-DG be used in parallel for higher current?

No-L7824ACV-DG lacks built-in current-sharing capability and has no master/slave control pins. Parallel operation causes unequal current distribution due to output voltage tolerance mismatch (±2 %), risking thermal runaway in one device. For >1.5 A, use a single higher-current regulator or switch-mode solution.

Is an input capacitor mandatory, and what value is recommended?

Yes-an input capacitor is mandatory for stability and transient response. STMicroelectronics specifies ≥0.33 µF ceramic placed as close as possible to Pin 1 (Input) and Pin 2 (Ground). For high-impedance sources or long input traces, add a 10–100 µF electrolytic in parallel to suppress low-frequency ripple and prevent oscillation.

Does L7824ACV-DG require a heat sink for 1 A continuous operation?

Yes-under 1 A load at 25 °C ambient, junction temperature rise is ~100 °C (using R_thJA = 60 °C/W), exceeding the 125 °C limit. A heatsink reducing R_thJA to ≤25 °C/W is required for continuous 1 A operation in still air; PCB copper pour alone is insufficient per thermal data in Table 2 of DS0422 Rev 38.

L7824ACV-DG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 24V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 2V @ 1A (Typ)

Current - Output:: 1.5A

Current - Quiescent (Iq):: 6 mA

Current - Supply (Max):: -

PSRR:: 54dB (120Hz)

Control Features:: -

Protection Features:: Over Temperature, Short Circuit

Operating Temperature:: 0°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

L7824ACV-DG FAQ

1.How can I place an order for L7824ACV-DG through Aetrix?

Please submit a Request for Quotation (RFQ) for L7824ACV-DG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L7824ACV-DG reliable?

The price and inventory of L7824ACV-DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7824ACV-DG is usually 5 days.

3.What payment methods are accepted for L7824ACV-DG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7824ACV-DG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L7824ACV-DG?

L7824ACV-DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L7824ACV-DG order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L7824ACV-DG?

For technical support, including L7824ACV-DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7824ACV-DG requirements.

6.How does Aetrix verify that L7824ACV-DG is sourced from the original manufacturer or authorized distributors?

All L7824ACV-DG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L7824ACV-DG meets industry standards.

7.What is the process for return or replacement of L7824ACV-DG?

All L7824ACV-DG units undergo pre-shipment inspection (PSI). If there is an issue with L7824ACV-DG, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L7824ACV-DG part is unused and in its original packaging.

Return procedure for L7824ACV-DG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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