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onsemi MC7824CD2TR4
- Part No.:
- MC7824CD2TR4
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MC7824CD2TR4.pdf
- Description:
- IC REG LINEAR 24V 1A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
MC7824CD2TR4 from onsemi is a fixed-output +24 V, 1.0 A linear voltage regulator in D2PAK-3 (TO-263) package with internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It delivers stable 24 V output across 5 mA–1.0 A load range with ≤2.0 V dropout at full load, supporting local regulation in industrial power supplies and embedded control systems.
For engineers reviewing the MC7824CD2TR4 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 24 V ±2% output tolerance at 25°C, 2.0 V dropout voltage at 1.0 A, 54 dB ripple rejection at 120 Hz, 1.4 mΩ output resistance, and compatibility with standard D2PAK heatsinking for continuous 1 A operation.
Technical Context
The MC7824CD2TR4 implements a monolithic series pass transistor architecture with integrated bandgap reference, error amplifier, and protection circuitry. Its safe-area compensation dynamically reduces short-circuit current as input-output differential increases, preventing second breakdown during fault conditions.
Thermal overload protection activates at +150°C junction temperature, forcing shutdown until cooldown; recovery is automatic. Input voltage range is 27.3–38 V DC, requiring ≥2.0 V headroom above 24 V output to maintain regulation under full load and ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +24 V nominal, ±2% tolerance at 25°C - ensures precise rail generation for 24 V logic and analog circuits |
| Output Current | 1.0 A continuous - supports medium-power loads without external boost transistors |
| Dropout Voltage | 2.0 V at 1.0 A, 25°C - mandates minimum 26.0 V input under worst-case load and temperature |
| Ripple Rejection | 54 dB at 120 Hz, 28–38 VIN - suppresses line-frequency noise from unregulated AC/DC supplies |
| Quiescent Current | 3.6–6.0 mA - enables low-standby-power designs when input is present but load inactive |
| Thermal Shutdown | Activates at TJ = +150°C - protects against sustained overloads or inadequate heatsinking |
| Short-Circuit Limit | 0.2 A typical - limits fault energy during output shorts, reducing PCB trace stress |
Pinout & Package
D2PAK-3 (TO-263) surface-mount package with exposed metal tab thermally and electrically connected to Pin 2 (Ground). Requires solderable heatsink pad on PCB for thermal management at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Unregulated DC input (27.3–38 V); requires 0.33 µF bypass capacitor mounted directly at pin |
| 2 | Ground | Common reference for input, output, and heatsink; must be low-impedance connection to minimize noise |
| 3 | Output | Regulated +24 V output; optional 0.1–1.0 µF output capacitor improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +24 V Output | Eliminates external resistor network; simplifies BOM and layout for dedicated 24 V rails |
| Internal Short-Circuit Protection | Limits peak fault current to ~0.2 A, enabling robust operation in industrial environments with wiring faults |
| Safe-Area Compensation | Reduces short-circuit current as VIN−VOUT rises - prevents pass transistor destruction during high-differential faults |
| No External Components Required | Operates stably with only input bypass cap; reduces design risk and board space vs. adjustable regulators |
| Pb-Free and RoHS Compliant | Meets environmental compliance requirements for industrial and automotive applications |
Applications
| Industrial PLC I/O Modules | 24 V Sensor Power Supplies |
|---|---|
|
Use Scenario: Providing isolated 24 V power to digital input modules receiving signals from field sensors and actuators. IC Role / Device Role / Timing Role: Primary local regulator converting 36 V DC bus to clean 24 V for signal conditioning and optocoupler biasing. Use Value: 2.0 V dropout allows operation from nominal 36 V bus even with 4 V cable drop; 54 dB ripple rejection maintains noise immunity in electrically noisy factory floors. |
Use Scenario: Powering multiple 4–20 mA loop-powered sensors in building automation systems. IC Role / Device Role / Timing Role: Fixed-voltage source delivering stable 24 V to sensor terminals independent of loop current draw (5–100 mA per sensor). Use Value: ±2% output tolerance ensures consistent sensor excitation across temperature; 1.0 A rating supports up to eight 20 mA sensors on single regulator. |
| Embedded Motor Control Boards | Test Equipment Power Rails |
|
Use Scenario: Supplying gate drive and logic power for H-bridge MOSFET drivers in small DC motor controllers. IC Role / Device Role / Timing Role: Secondary regulator deriving 24 V from main 48 V supply to power driver ICs and microcontroller peripherals. Use Value: Internal thermal shutdown prevents latch-up during motor stall events; safe-area compensation avoids destructive failure during rapid VIN transients. |
Use Scenario: Generating calibrated 24 V reference rails in benchtop multimeters and signal generators. IC Role / Device Role / Timing Role: Precision voltage source for analog front-end biasing and DAC reference buffering. Use Value: 1.4 mΩ output impedance minimizes load-induced voltage sag; −2.0 mV/°C tempco ensures <±15 mV drift over 0–70°C operating 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 |
|---|---|---|---|
| LM7824CD2T | Same 24 V output, 1.0 A rating, D2PAK-3 package; higher quiescent current (up to 8.0 mA) and lower ripple rejection (50 dB) | Less suitable for low-power standby modes or high-noise AC/DC inputs | Select when legacy TI-compatible footprint is required and ripple/noise sensitivity is low |
| NCV7824BD2TR4 | Automotive-grade variant (AEC-Q100 qualified); tighter output tolerance (±1.5%), wider operating temperature (−40°C to +150°C) | Required for automotive body control modules and under-hood electronics | Choose for automotive OEM programs where qualification and extended temperature are mandatory |
Compared with LM7824CD2T, MC7824CD2TR4 offers lower quiescent current and superior ripple rejection; versus NCV7824BD2TR4, it trades automotive qualification for cost advantage in industrial applications where AEC-Q100 is not mandated.
Availability
MC7824CD2TR4 is available at Aetrix Electronics and suitable for industrial PLCs, 24 V sensor networks, embedded motor drives, and test equipment requiring stable component supply with long-term manufacturability.
Supply support for MC7824CD2TR4 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
onsemi is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.
The MC7800 series was designed as a robust, drop-in family of fixed-output linear regulators targeting cost-sensitive, high-reliability industrial power systems where simplicity, thermal resilience, and proven architecture are critical.
FAQ
What is the minimum input voltage required for MC7824CD2TR4 to regulate at full 1.0 A load?
The MC7824CD2TR4 requires a minimum input voltage of 26.0 V DC to maintain regulation at 1.0 A output current, based on its 2.0 V dropout voltage specification at 25°C. At elevated junction temperatures or with reduced heatsinking, the dropout may increase slightly; design margin should include ≥27.3 V minimum input per datasheet conditions.
Does MC7824CD2TR4 require an input bypass capacitor, and what value is recommended?
Yes, MC7824CD2TR4 requires a 0.33 µF or larger input bypass capacitor placed directly across Pins 1 and 2. onsemi specifies tantalum, mylar, or other low-ESR capacitors with short leads to ensure high-frequency stability and prevent oscillation under dynamic load conditions.
Can MC7824CD2TR4 be used in parallel to increase output current beyond 1.0 A?
No, MC7824CD2TR4 is not designed for parallel operation. Its output voltage tolerance (±2%) and lack of current-sharing features make direct paralleling unstable and prone to thermal runaway. For >1.0 A, use a single higher-current regulator or add an external pass transistor with proper biasing.
What is the thermal resistance junction-to-case (RθJC) for MC7824CD2TR4 in D2PAK-3 package?
The thermal resistance junction-to-case (RθJC) for MC7824CD2TR4 is 5.0°C/W, measured from die junction to the exposed metal tab (Pin 2). Effective heatsinking requires low-thermal-resistance mounting of this tab to a copper plane or external heatsink to sustain 1.0 A continuous output.
Is MC7824CD2TR4 compatible with lead-free reflow soldering processes?
Yes, MC7824CD2TR4 is Pb-free and RoHS-compliant, qualified for standard lead-free reflow profiles including peak temperatures up to 260°C. The D2PAK-3 package supports IPC/JEDEC J-STD-020D moisture sensitivity level 3, requiring baking only if exposed to ambient >60% RH for >168 hours.
MC7824CD2TR4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- 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:
- 1A
- Current - Quiescent (Iq):
- 6.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 61dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
MC7824CD2TR4 FAQ
1.How can I place an order for MC7824CD2TR4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7824CD2TR4 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 MC7824CD2TR4 reliable?
The price and inventory of MC7824CD2TR4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7824CD2TR4 is usually 5 days.
3.What payment methods are accepted for MC7824CD2TR4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7824CD2TR4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7824CD2TR4?
MC7824CD2TR4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7824CD2TR4 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 MC7824CD2TR4?
For technical support, including MC7824CD2TR4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7824CD2TR4 requirements.
6.How does Aetrix verify that MC7824CD2TR4 is sourced from the original manufacturer or authorized distributors?
All MC7824CD2TR4 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 MC7824CD2TR4 meets industry standards.
7.What is the process for return or replacement of MC7824CD2TR4?
All MC7824CD2TR4 units undergo pre-shipment inspection (PSI). If there is an issue with MC7824CD2TR4, 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 MC7824CD2TR4 part is unused and in its original packaging.
Return procedure for MC7824CD2TR4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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