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

STMicroelectronics L7824CV-DG

Name: L7824CV-DG
Brand: STMicroelectronics
SKU: L7824CV-DG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L7824CV-DG

Manufacturer:: STMicroelectronics

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

Package:: TO-220-3

Datasheet:: L7824CV-DG.pdf

Description:: IC REG LINEAR 24V 1.5A TO220

Quantity:: RFQ Add To RFQ list

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Inventory:4,934

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Product details

Overview

L7824CV-DG from STMicroelectronics is a three-terminal positive fixed-voltage linear regulator delivering 24 V ±2 % output at up to 1.5 A, featuring thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It operates with input voltages up to 40 V and is commonly used in industrial power supplies, local on-card regulation for motor control logic, and legacy telecom equipment requiring stable 24 V bias rails.

For engineers reviewing the L7824CV-DG datasheet, L7824CV-DG pinout, L7824CV-DG application, or L7824CV-DG equivalent, key selection considerations include dropout voltage (2 V @ 1 A), load regulation (≤100 mV over 5 mA–1 A), supply voltage rejection (54 dB @ 120 Hz), junction temperature range (0 to 125 °C), and TO-220FP package thermal resistance (R_thJC = 5 °C/W).

Technical Context

The L7824CV-DG implements a monolithic bipolar linear regulator architecture with internal current limiting, thermal shutdown, and SOA protection-enabling robust operation without external protection circuitry. Its feedback loop maintains output stability across line (VI = 26.7–38 V) and load (IO = 5 mA–1.5 A) variations while sustaining ≤24.5 V maximum output under all specified conditions.

Designed for fixed-output use, it requires only two external capacitors (CI ≥ 0.33 µF, CO ≥ 0.1 µF) for stability. The device does not support adjustable output via external resistors and relies on its internal bandgap reference and error amplifier for 24 V regulation accuracy of ±2 % at TJ = 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	24 V ±2 % (23.5–24.5 V at TJ = 25 °C); ensures compatibility with 24 V nominal systems requiring tight rail tolerance
Max output current	1.5 A continuous; supports high-current loads like relay drivers or sensor signal conditioning stages
Input voltage range	27.3–38 V DC; enables use with unregulated 36 V bus or rectified 24 VAC supplies
Dropout voltage	2 V @ 1 A, TJ = 25 °C; defines minimum headroom needed between input and output for regulation
Supply voltage rejection	54 dB @ 120 Hz, IO = 500 mA; suppresses ripple from rectified AC inputs in industrial power designs
Thermal resistance (junction-to-case)	5 °C/W (TO-220FP); determines heatsink sizing requirement for sustained 1.5 A operation
Operating junction temperature	0 to 125 °C; validated for use in non-ventilated enclosures or elevated ambient environments

Pinout & Package

Supplied in TO-220FP package-a full-molded, insulated variant of TO-220 with vertical leads and integrated mounting flange for direct heatsink attachment. Pin 1 is Input, Pin 2 is Ground, Pin 3 is Output (top view, tab facing down).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Left)	Input (VI)	Accepts unregulated DC input; must be decoupled with ≥0.33 µF ceramic capacitor near device
Pin 2 (Center)	Ground (GND)	Common reference for input and output; connects to PCB ground plane with low-inductance path
Pin 3 (Right)	Output (VO)	Delivers regulated 24 V; requires ≥0.1 µF output capacitor for transient stability and EMI suppression

Key Features

Feature	Design Value
Internal thermal shutdown	Activates at ~165 °C junction temperature, preventing permanent damage during overload or poor heatsinking
Short-circuit current limit	0.2 A typical (2.2 A peak); protects downstream circuitry during output faults without latch-up
SOA protection	Prevents destructive second breakdown during simultaneous high voltage and current stress
Low output noise	10 µV/√Hz (10 Hz–100 kHz); suitable for analog front-ends and precision reference circuits
Fixed 24 V output	No external resistors required; eliminates calibration drift and reduces BOM count in cost-sensitive applications

Applications

Industrial PLC Power Supply

Motor Control Logic Bias

Use Scenario: Provides clean 24 V rail for digital I/O modules and microcontroller peripherals inside programmable logic controllers.

IC Role / Device Role / Timing Role: Local point-of-load regulator replacing centralized 24 V distribution to minimize voltage drop and noise coupling.

Use Value: Eliminates need for remote sensing or active compensation; maintains ±2 % regulation despite PCB trace resistance up to 100 mΩ.

Use Scenario: Powers gate drivers and isolation logic in 3-phase inverter control boards operating in harsh factory environments.

IC Role / Device Role / Timing Role: Stable bias source for optocouplers and level-shifters interfacing MCU GPIOs to high-voltage power stages.

Use Value: Thermal shutdown and SOA protection ensure uninterrupted operation during motor stall events causing sustained overcurrent.

Legacy Telecom Equipment

Test & Measurement Instrumentation

Use Scenario: Replaces aging discrete regulator designs in base station line cards requiring long-lifecycle 24 V auxiliary power.

IC Role / Device Role / Timing Role: Fixed-output linear regulator providing low-noise supply for analog monitoring circuits and fan controllers.

Use Value: 54 dB ripple rejection suppresses switching noise from upstream DC/DC converters, preserving signal integrity in analog measurement paths.

Use Scenario: Supplies reference voltage and analog front-end circuitry in portable multimeters and oscilloscope probe interfaces.

IC Role / Device Role / Timing Role: Low-noise, thermally stable voltage source enabling accurate ADC reference and op-amp biasing.

Use Value: 10 µV/√Hz output noise and −1.5 mV/°C temperature drift allow sub-0.1 % measurement accuracy over 0–50 °C ambient range.

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
LM7824KCT/NOPB	Higher quiescent current (8 mA vs. 4.6–6 mA), wider output tolerance (±4 % vs. ±2 %), R_thJC = 3 °C/W (TO-3)	Requires larger heatsink for same power dissipation; less suitable for space-constrained PCBs	Select when TO-3 mechanical compatibility or higher surge current capability is prioritized over efficiency and footprint
MC7824BD2TR4G	Lower max input voltage (35 V vs. 40 V), tighter load regulation (≤50 mV vs. ≤100 mV), R_thJC = 4 °C/W (D2PAK)	Better suited for compact SMT layouts but incompatible with through-hole TO-220FP mounting	Select for automated assembly and improved thermal performance where board real estate is limited and input voltage stays ≤35 V

Compared with LM7824KCT/NOPB and MC7824BD2TR4G, the L7824CV-DG offers superior output accuracy and lower quiescent current in a cost-effective through-hole package-making it optimal for industrial upgrades where legacy TO-220FP footprints and strict 24 V tolerance are mandatory.

Availability

L7824CV-DG is available at Aetrix Electronics and suitable for industrial PLC power supplies, motor control logic biasing, and legacy telecom equipment requiring stable component supply with long-term lifecycle assurance.

Supply support for L7824CV-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, specializing in automotive, industrial, and power management ICs with broad manufacturing and quality certifications.

The L78 series was developed specifically for cost-sensitive, high-reliability linear regulation in industrial and consumer power systems-emphasizing ruggedness, ease of use, and compatibility with legacy designs.

FAQ

What is the minimum load current required for regulation?

The L7824CV-DG requires a minimum load current of 5 mA to maintain regulation. Below this threshold, output voltage may rise above 24.5 V due to internal bias current limitations. Applications with intermittent or ultra-low-power standby modes should include a bleeder resistor or active load to guarantee compliance.

Can L7824CV-DG be used in parallel for higher current?

No-L7824CV-DG is not designed for parallel operation. Its output voltage tolerance (±2 %) and lack of current-sharing features mean mismatched units will cause one device to dominate conduction, leading to thermal runaway. For >1.5 A, select a higher-current regulator or switch-mode solution.

Is an input capacitor mandatory?

Yes-an input capacitor of at least 0.33 µF (ceramic or tantalum) is mandatory and must be placed within 1 cm of the L7824CV-DG input pin. This prevents oscillation and improves transient response to input voltage spikes, especially when sourced from long cables or unregulated supplies.

Does L7824CV-DG support reverse-polarity input protection?

No-the L7824CV-DG has no built-in reverse-polarity protection. Applying negative voltage to the input pin can cause irreversible damage. External protection (e.g., series diode or MOSFET-based ideal diode) must be added if system-level reverse input is possible.

L7824CV-DG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

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):: 8 mA

Current - Supply (Max):: -

PSRR:: 50dB (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

L7824CV-DG FAQ

1.How can I place an order for L7824CV-DG through Aetrix?

Please submit a Request for Quotation (RFQ) for L7824CV-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 L7824CV-DG reliable?

The price and inventory of L7824CV-DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7824CV-DG is usually 5 days.

3.What payment methods are accepted for L7824CV-DG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7824CV-DG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L7824CV-DG?

L7824CV-DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L7824CV-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 L7824CV-DG?

For technical support, including L7824CV-DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7824CV-DG requirements.

6.How does Aetrix verify that L7824CV-DG is sourced from the original manufacturer or authorized distributors?

All L7824CV-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 L7824CV-DG meets industry standards.

7.What is the process for return or replacement of L7824CV-DG?

All L7824CV-DG units undergo pre-shipment inspection (PSI). If there is an issue with L7824CV-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 L7824CV-DG part is unused and in its original packaging.

Return procedure for L7824CV-DG:

1.Submit a request within 90 days.

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

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