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onsemi MC78M05ABDT
- Part No.:
- MC78M05ABDT
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC78M05ABDT.pdf
- Description:
- IC REG LINEAR 5V 500MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,869
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Product details
Overview
MC78M05ABDT from onsemi is a 5.0 V, 500 mA fixed-output linear voltage regulator in DPAK-3 (TO-252) package with ±2% output accuracy, −40°C to +125°C operating junction temperature range, and integrated thermal shutdown and short-circuit protection. It delivers stable local regulation for automotive control modules, industrial sensors, and embedded power rails where ruggedness and AEC-Q100-aligned reliability are required.
For engineers reviewing the MC78M05ABDT datasheet, pinout, applications, or equivalent options, this device serves as a drop-in replacement for legacy 78M05 variants requiring extended temperature operation, precise output tolerance, and Pb-free compliance - especially in space-constrained PCBs using surface-mount thermal management.
Technical Context
The MC78M05ABDT implements a monolithic three-terminal series regulator architecture with internal safe-area compensation for the pass transistor, enabling robust operation under transient overload and thermal stress. Its design includes fixed 5.0 V output set by precision internal resistive feedback, no external components required for basic operation, and guaranteed performance across −40°C to +125°C.
It features 2.0 V dropout voltage at 500 mA, 62 dB ripple rejection at 120 Hz (IO = 100 mA), and ±0.2 mV/°C average temperature coefficient - confirming tight regulation stability over input line, load, and temperature variations without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2% (guaranteed at TJ = 25°C; supports precision analog and digital logic supply) |
| Max Output Current | 500 mA continuous (with adequate heatsinking; enables mid-power microcontroller and peripheral rails) |
| Input Voltage Range | 7.0–20 V DC (supports 12 V automotive and industrial bus inputs with margin) |
| Dropout Voltage | 2.0 V at 500 mA (enables operation with ≥7 V input; limits minimum system rail headroom) |
| Ripple Rejection | 62 dB at 120 Hz, IO = 100 mA (suppresses rectified AC noise in unregulated DC supplies) |
| Thermal Shutdown | Active at TJ ≥ +150°C (prevents permanent damage during sustained overload or poor PCB thermal design) |
| Short-Circuit Limit | 350 mA typical (protects against wiring faults while maintaining partial system functionality) |
Pinout & Package
DPAK-3 (TO-252) plastic surface-mount package with exposed thermal pad connected to Pin 2 (GND); case outline per onsemi CASE 369C; dimensions 6.10 × 6.54 × 2.28 mm, 2.29 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Unregulated DC input (VI); must be bypassed with ≥0.33 µF low-ESR capacitor near pin for stability |
| 2 | Ground | Common reference and thermal path; heatsink surface tied internally to this pin |
| 3 | Output | Regulated 5.0 V output (VO); requires minimal output capacitance (e.g., 0.1 µF ceramic) for transient response |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation eliminates need for external feedback resistors or compensation networks |
| ±2% output accuracy (MC78M05AB variant) | Meets tight tolerance requirements for ADC references and 5 V logic families without calibration |
| −40°C to +125°C operating range | Validated for under-hood automotive and industrial environments without derating |
| Internal thermal overload protection | Automatic shutdown and recovery prevents latch-up or silicon degradation during thermal stress |
| Pb-free, RoHS-compliant package | DPAK-3 (CASE 369C) meets global environmental compliance without solderability compromise |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and discrete I/O drivers in door module or lighting controller. IC Role / Device Role / Timing Role: Local 5 V rail generator with fault resilience and wide-temperature operation. Use Value: Eliminates need for external thermal monitoring or current limiting circuitry due to integrated protection. |
Use Scenario: Supplying precision op-amps, RTD bridges, and 16-bit ADCs in factory-floor temperature or pressure transmitters. IC Role / Device Role / Timing Role: Stable analog supply reference with low output noise (40 µV RMS) and minimal drift. Use Value: Maintains <±0.5 LSB error in 16-bit systems over full temperature range without recalibration. |
| Embedded Network Router Power | Medical Diagnostic Equipment Sub-Rail |
Use Scenario: Providing clean 5 V for Ethernet PHY, flash memory, and USB interface ICs in compact edge routers. IC Role / Device Role / Timing Role: Point-of-load regulator minimizing board-level EMI via low-noise design and compact footprint. Use Value: Achieves 62 dB ripple rejection at 120 Hz, reducing conducted noise into sensitive high-speed data paths. |
Use Scenario: Generating isolated 5 V supply for patient-connected analog front-end circuits in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Safety-critical auxiliary rail with guaranteed short-circuit current limit (350 mA) and thermal fail-safe behavior. Use Value: Limits fault energy during insulation breakdown, supporting IEC 60601-1 creepage/clearance and risk management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC78M05CDTRKG | Same DPAK-3 package but 0°C to +125°C rating and ±4% output tolerance (not ±2%) | Acceptable for commercial-grade consumer electronics; not qualified for automotive or extended-temp industrial use | Select when cost sensitivity outweighs accuracy and temperature range requirements |
| NCV78M05ABDTRKG | Identical electrical specs and packaging; adds AEC-Q100 qualification, PPAP capability, and automotive-specific change control | Required for Tier-1 automotive production; supports full traceability and zero-defect manufacturing protocols | Select for OEM automotive programs where qualification documentation and process control are mandatory |
Compared with MC78M05CDTRKG, the MC78M05ABDT provides tighter output accuracy and extended low-temperature operation; compared with NCV78M05ABDTRKG, it lacks formal AEC-Q100 certification but shares identical silicon and thermal performance - making it suitable for automotive-adjacent industrial designs without full PPAP overhead.
Availability
MC78M05ABDT is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and embedded network router power requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for MC78M05ABDT 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MC78M00A series - including MC78M05ABDT - was designed to deliver rugged, drop-in 5 V regulation for harsh-environment applications where legacy 78xx regulators lacked extended temperature range or AEC-aligned reliability.
FAQ
What is the maximum input voltage for MC78M05ABDT?
The absolute maximum input voltage for MC78M05ABDT is 35 V DC under normal operating conditions, though recommended operating range is 7.0 V to 20 V DC to maintain regulation integrity and thermal safety. Exceeding 35 V risks permanent damage even with thermal shutdown active.
Does MC78M05ABDT require input and output capacitors?
MC78M05ABDT does not require external capacitors for basic regulation, but onsemi recommends a 0.33 µF low-ESR capacitor at the input and a 0.1 µF ceramic capacitor at the output to ensure stability under dynamic load changes and high-frequency noise suppression - especially with long PCB traces.
Is MC78M05ABDT pin-compatible with other 78M05 variants in DPAK-3?
Yes, MC78M05ABDT uses the standard DPAK-3 (TO-252) pinout: Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output. It is mechanically and electrically pin-compatible with MC78M05CDTRKG, MC78M05BDTRKG, and NCV78M05ABDTRKG - all sharing identical footprint and terminal assignment.
What is the thermal resistance of MC78M05ABDT in its DPAK-3 package?
MC78M05ABDT in DPAK-3 (CASE 369C) has θJA = 92°C/W (junction-to-air, no heatsink) and θJC = 5.0°C/W (junction-to-case). Effective thermal performance depends on PCB copper area: 25 mm² of 2 oz. copper reduces θJA to ~50°C/W, enabling 500 mA continuous operation at TA = 50°C.
Can MC78M05ABDT be used in automotive applications?
MC78M05ABDT operates across −40°C to +125°C and includes automotive-grade protection features (thermal shutdown, short-circuit limiting), but it is not AEC-Q100 qualified. For production automotive use, select NCV78M05ABDTRKG - the functionally identical part with formal AEC-Q100 certification and PPAP support.
MC78M05ABDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MC78M05ABDT FAQ
1.How can I place an order for MC78M05ABDT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78M05ABDT 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 MC78M05ABDT reliable?
The price and inventory of MC78M05ABDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78M05ABDT is usually 5 days.
3.What payment methods are accepted for MC78M05ABDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78M05ABDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78M05ABDT?
MC78M05ABDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78M05ABDT 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 MC78M05ABDT?
For technical support, including MC78M05ABDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78M05ABDT requirements.
6.How does Aetrix verify that MC78M05ABDT is sourced from the original manufacturer or authorized distributors?
All MC78M05ABDT 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 MC78M05ABDT meets industry standards.
7.What is the process for return or replacement of MC78M05ABDT?
All MC78M05ABDT units undergo pre-shipment inspection (PSI). If there is an issue with MC78M05ABDT, 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 MC78M05ABDT part is unused and in its original packaging.
Return procedure for MC78M05ABDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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