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onsemi MC78M15ACDTRK
- Part No.:
- MC78M15ACDTRK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC78M15ACDTRK.pdf
- Description:
- IC REG LINEAR 15V 500MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,944
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Product details
Overview
MC78M15ACDTRK from onsemi is a 500 mA positive fixed-voltage linear regulator delivering a nominal 15 V output with ±2% accuracy (±0.3 V) over 0°C to +125°C, featuring internal thermal shutdown, short-circuit current limiting, and safe-area compensation for rugged local on-card regulation in industrial power supplies.
For engineers reviewing the MC78M15ACDTRK datasheet, pinout, applications, or equivalent options, this page provides verified specifications, DPAK-3 package details, real-world use cases, and validated alternative parts for automotive-grade 15 V supply design.
Technical Context
The MC78M15ACDTRK implements a monolithic three-terminal series pass regulator architecture with built-in protection circuitry: thermal overload shutdown triggers at ~150°C junction temperature, short-circuit current limit holds peak output at 350 mA under VI = 35 V, and safe-area compensation dynamically reduces short-circuit current as input-output differential increases.
It operates with a minimum dropout voltage of 2.0 V (VI − VO), supports input voltages up to 35 V DC, and maintains output stability without external capacitors in most low-noise, low-current applications-though a 0.33 µF input bypass capacitor is recommended for long trace or high-capacitive load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 15.0 V ±2% (±0.3 V) at TJ = 25°C; ensures stable 15 V rail for analog front-ends and logic interfaces |
| Max Output Current | 500 mA continuous; sufficient for powering microcontrollers, sensors, and op-amps without heatsinking below 50°C ambient |
| Input Voltage Range | 17.5–30 V DC (for full spec compliance); supports 24 V industrial bus with margin for ripple and transients |
| Line Regulation | 10 mV typical (≤50 mV max); limits output drift due to input variation-critical for precision analog circuits |
| Ripple Rejection | 54 dB @ 120 Hz, IO = 100 mA; suppresses AC line noise from unregulated DC sources |
| Dropout Voltage | 2.0 V typical; requires minimum 17 V input to sustain 15 V output under full load |
| Quiescent Current | 3.2–6.0 mA; enables low standby power in always-on systems |
Pinout & Package
DPAK-3 (TO-252) plastic surface-mount package (Case 369C), Pb-free, with heatsink tab electrically connected to Pin 2 (GND). Compact 6.10 × 6.54 × 2.28 mm footprint optimized for automated assembly and thermal performance on 2 oz. copper PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input; must be bypassed with ≥0.33 µF low-ESR capacitor near pin for stability |
| Pin 2 | Ground | Common reference and thermal path; heatsink tab is internally tied to this pin |
| Pin 3 | Output | Regulated 15 V output; capable of sourcing up to 500 mA with ≤300 mV load regulation error |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation-no feedback resistors or compensation networks needed for fixed 15 V operation |
| ±2% output accuracy | MC78M15AC variant guarantees tighter tolerance than standard MC78M15C (±3%), reducing need for post-regulation trimming |
| Internal thermal shutdown | Automatically disables output above ~150°C junction temperature, preventing damage during overload or poor heatsinking |
| Short-circuit current limiting | Clamps output to ~350 mA during hard shorts, enabling safe fault recovery without external fusing |
| Pb-free DPAK-3 package | RoHS-compliant surface-mount package with exposed thermal pad for efficient PCB heat dissipation |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated analog sensor inputs and digital I/O drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local 15 V rail generator for op-amp signal conditioning stages and optocoupler LED drivers. Use Value: ±2% accuracy ensures consistent ADC reference scaling; 500 mA capacity supports multiple channel buffers without derating. | Use Scenario: Supplying 15 V to window lift motor controllers and door lock actuators in 12 V/24 V vehicle architectures. IC Role / Device Role / Timing Role: Secondary regulated rail derived from battery or alternator output for ECU peripheral subsystems. Use Value: AEC-Q100–compatible thermal protection prevents latch-up during cold-crank transients; DPAK-3 footprint suits compact module layouts. |
| Medical Patient Monitor Front-End | Test & Measurement Signal Generator |
Use Scenario: Providing clean, low-noise 15 V bias for ECG amplifier stages and isolation barrier drivers. IC Role / Device Role / Timing Role: Low-drift analog supply rail decoupled from noisy digital domains. Use Value: 54 dB ripple rejection attenuates switching noise from adjacent DC/DC converters; <90 µV RMS output noise preserves signal integrity. | Use Scenario: Generating stable 15 V for op-amp-based waveform shaping and DAC output buffers in benchtop instruments. IC Role / Device Role / Timing Role: Precision voltage source for analog signal chain biasing and calibration references. Use Value: ±0.3 mV/°C tempco minimizes thermal drift across operating range; 10 mV line regulation ensures fidelity during AC adapter voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC7815CDTRKG | Standard accuracy (±3% vs. ±2%), same DPAK-3 package and 500 mA rating | Lacks MC78M15ACDTRK's tighter initial tolerance; suitable where cost sensitivity outweighs precision needs | Select when ±3% output tolerance is acceptable and BOM cost optimization is prioritized |
| NCV78M15BDTRKG | Automotive-grade (-40°C to +125°C), same ±2% accuracy, but rated for extended temperature range | Qualified to AEC-Q100; designed for under-hood environments with higher thermal stress and vibration | Choose for automotive body electronics requiring PPAP documentation and extended temp validation |
Compared with MC7815CDTRKG and NCV78M15BDTRKG, the MC78M15ACDTRK offers the optimal balance of industrial-grade precision (±2%), commercial temperature range (0°C to +125°C), and DPAK-3 thermal efficiency-making it ideal for cost-sensitive yet accuracy-critical embedded power rails.
Availability
MC78M15ACDTRK is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and test equipment requiring stable component supply with consistent parametric performance across production lots.
Supply support for MC78M15ACDTRK 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MC78MxxA series was designed specifically for robust, low-cost local regulation in space-constrained industrial and automotive control modules-emphasizing reliability, integrated protection, and ease of use without external components.
FAQ
What is the guaranteed output voltage tolerance for MC78M15ACDTRK?
The MC78M15ACDTRK guarantees ±2% output voltage tolerance (±0.3 V around 15 V) at TJ = 25°C, per its "A" grade designation-tighter than the standard MC78M15C (±3%) and validated across the full 0°C to +125°C operating range.
Can MC78M15ACDTRK operate without an input bypass capacitor?
Yes, the MC78M15ACDTRK can operate without an input bypass capacitor in low-noise, low-current applications with short PCB traces. However, a 0.33 µF tantalum or ceramic capacitor is strongly recommended at the input pins when using long wires or driving large capacitive loads to ensure stability and transient response.
What is the maximum input voltage the MC78M15ACDTRK can withstand?
The MC78M15ACDTRK supports a maximum input voltage of 35 V DC for devices rated 5.0–18 V output (per Absolute Maximum Ratings table), making it compatible with 24 V industrial buses including worst-case transients and ripple peaks.
How does thermal shutdown work in MC78M15ACDTRK?
The MC78M15ACDTRK incorporates internal thermal shutdown that disables the output transistor when junction temperature exceeds approximately 150°C. Recovery occurs automatically once the die cools below the hysteresis threshold (~135°C), protecting against permanent damage during sustained overload or inadequate heatsinking.
Is MC78M15ACDTRK pin-compatible with other MC78Mxx regulators in DPAK-3?
Yes, all MC78Mxx variants in DPAK-3 (e.g., MC78M05CDTRKG, MC78M12CDTRKG) share identical pinout (Pin 1: Input, Pin 2: GND, Pin 3: Output) and package outline (Case 369C), enabling drop-in replacement across output voltages-provided input/output voltage margins and thermal design accommodate the new regulation point.
MC78M15ACDTRK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 15V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 70dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MC78M15ACDTRK FAQ
1.How can I place an order for MC78M15ACDTRK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78M15ACDTRK 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 MC78M15ACDTRK reliable?
The price and inventory of MC78M15ACDTRK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78M15ACDTRK is usually 5 days.
3.What payment methods are accepted for MC78M15ACDTRK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78M15ACDTRK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78M15ACDTRK?
MC78M15ACDTRK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78M15ACDTRK 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 MC78M15ACDTRK?
For technical support, including MC78M15ACDTRK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78M15ACDTRK requirements.
6.How does Aetrix verify that MC78M15ACDTRK is sourced from the original manufacturer or authorized distributors?
All MC78M15ACDTRK 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 MC78M15ACDTRK meets industry standards.
7.What is the process for return or replacement of MC78M15ACDTRK?
All MC78M15ACDTRK units undergo pre-shipment inspection (PSI). If there is an issue with MC78M15ACDTRK, 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 MC78M15ACDTRK part is unused and in its original packaging.
Return procedure for MC78M15ACDTRK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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