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

onsemi MC78M15ABDTG

Name: MC78M15ABDTG
Brand: onsemi
SKU: MC78M15ABDTG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC78M15ABDTG

Manufacturer:: onsemi

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

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: MC78M15ABDTG.pdf

Description:: IC REG LINEAR 15V 500MA DPAK

Quantity:: RFQ Add To RFQ list

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Inventory:2,007

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Product details

Overview

MC78M15ABDTG from onsemi is a 500 mA, 15 V fixed-output positive voltage regulator in DPAK-3 (TO-252) package, featuring ±2% output accuracy, internal thermal shutdown, short-circuit current limiting, and safe-area compensation for rugged local regulation. It delivers stable 15 V output across −40°C to +125°C junction temperature, with dropout voltage of 2.0 V and ripple rejection up to 70 dB at 120 Hz - used in automotive power supplies, industrial control modules, and embedded sensor interfaces.

For engineers reviewing the MC78M15ABDTG datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed −40°C to +125°C operation, 15 V ±2% tolerance, DPAK-3 thermal performance (θ_JC = 5.0°C/W), and compatibility with standard linear regulator design practices including input bypassing and heatsink mounting.

Technical Context

The MC78M15ABDTG implements a monolithic three-terminal series pass regulator architecture with integrated PNP pass transistor, precision bandgap reference, and error amplifier. Its internal safe-area compensation dynamically reduces short-circuit current as V_IN−V_OUT increases, preventing secondary breakdown under overload.

Thermal shutdown activates at T_J ≈ +150°C, and current limiting holds peak output at 350 mA under short-circuit conditions at V_IN = 35 V. The device requires no external components for basic operation but benefits from ≥0.33 µF input ceramic/tantalum capacitor for high-frequency stability.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	15.0 V ±2% (14.7–15.3 V at T_J = 25°C; 14.4–15.6 V over full load/line range)
Max Output Current	500 mA continuous (with adequate heatsinking); peak 700 mA pulsed
Dropout Voltage	2.0 V typical (V_IN − V_OUT) at I_O = 500 mA - sets minimum input headroom requirement
Ripple Rejection	70 dB at 120 Hz, 300 mA load - suppresses AC line noise in unregulated DC supplies
Operating Temp	−40°C to +125°C junction - qualified for automotive and industrial environments
Quiescent Current	3.2–6.0 mA typical - low bias draw enables efficient standby operation
Output Noise	90 µV_RMS (10 Hz–100 kHz) - suitable for analog sensor and MCU supply rails

Pinout & Package

DPAK-3 (TO-252) package with exposed thermal pad (pin 2 connected to GND). Heatsink surface electrically tied to pin 2 (GND), enabling direct PCB copper pour attachment for thermal management.

Pin/Terminal	Circuit Role	Design Meaning
1	Input	Unregulated DC input (max 35 V); requires ≥0.33 µF bypass capacitor close to pin
2	Ground	Common reference and thermal pad connection; must be low-impedance to PCB ground plane
3	Output	Regulated 15 V output; stable into capacitive loads ≤100 µF without oscillation

Key Features

Feature	Design Value
No external components required	Self-contained regulation with internal reference, error amp, and pass transistor - simplifies BOM and layout
±2% output accuracy (A-grade)	Tighter tolerance than standard B-grade (±4%) - reduces need for post-regulation trimming in precision systems
Internal thermal shutdown	Automatic disable above ~150°C junction - prevents permanent damage during sustained overload or poor heatsinking
Safe-area compensated pass transistor	Reduces short-circuit current as V_IN−V_OUT rises - avoids second breakdown failure mode
Pb-free, RoHS-compliant package	DPAK-3 (Case 369C) meets automotive and industrial environmental compliance requirements

Applications

Automotive Body Control Module	Industrial PLC I/O Power
Use Scenario: Supplies 15 V to microcontroller peripherals, CAN transceivers, and analog front-ends in vehicle door modules. IC Role / Device Role / Timing Role: Local point-of-load regulator converting 24 V battery-derived rail to clean 15 V. Use Value: −40°C to +125°C rating ensures reliable startup and operation across automotive ambient extremes.	Use Scenario: Powers isolated analog input conditioning circuits and digital logic in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Fixed-voltage source for op-amp rails and ADC references requiring low noise and stable headroom. Use Value: 90 µV_RMS output noise and 70 dB ripple rejection maintain signal integrity in noisy factory environments.
Medical Sensor Interface	Test & Measurement Equipment
Use Scenario: Provides regulated 15 V to precision instrumentation amplifiers and bridge sensor excitation circuits. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply rail with tight initial accuracy and ±0.3 mV/°C tempco. Use Value: ±2% output tolerance and ±0.3 mV/°C average temperature coefficient minimize calibration drift over operating range.	Use Scenario: Generates auxiliary 15 V rail for analog signal chain components in benchtop multimeters and oscilloscope front-ends. IC Role / Device Role / Timing Role: Stable, low-noise DC source replacing switching regulators where EMI sensitivity prohibits SMPS use. Use Value: No external compensation needed and inherent stability into capacitive loads simplify design validation and reduce test time.

Automotive Body Control Module

Industrial PLC I/O Power

Use Scenario: Supplies 15 V to microcontroller peripherals, CAN transceivers, and analog front-ends in vehicle door modules.

IC Role / Device Role / Timing Role: Local point-of-load regulator converting 24 V battery-derived rail to clean 15 V.

Use Value: −40°C to +125°C rating ensures reliable startup and operation across automotive ambient extremes.

Use Scenario: Powers isolated analog input conditioning circuits and digital logic in programmable logic controller backplanes.

IC Role / Device Role / Timing Role: Fixed-voltage source for op-amp rails and ADC references requiring low noise and stable headroom.

Use Value: 90 µV_RMS output noise and 70 dB ripple rejection maintain signal integrity in noisy factory environments.

Medical Sensor Interface

Test & Measurement Equipment

Use Scenario: Provides regulated 15 V to precision instrumentation amplifiers and bridge sensor excitation circuits.

IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply rail with tight initial accuracy and ±0.3 mV/°C tempco.

Use Value: ±2% output tolerance and ±0.3 mV/°C average temperature coefficient minimize calibration drift over operating range.

Use Scenario: Generates auxiliary 15 V rail for analog signal chain components in benchtop multimeters and oscilloscope front-ends.

IC Role / Device Role / Timing Role: Stable, low-noise DC source replacing switching regulators where EMI sensitivity prohibits SMPS use.

Use Value: No external compensation needed and inherent stability into capacitive loads simplify design validation and reduce test time.

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
MC7815CDTG	Same 15 V output, but 0°C to +125°C temp range and ±4% tolerance (C-grade)	Not rated for −40°C cold-start; lower accuracy limits use in precision analog systems	Select when cost-sensitive industrial designs do not require extended temperature or tight tolerance
NCV78M15BDTRKG	Automotive-qualified AEC-Q100, same −40°C to +125°C range and ±4% tolerance (B-grade)	Higher production traceability and PPAP support; wider output tolerance affects system margining	Prefer for Tier-1 automotive programs requiring full automotive qualification documentation

Compared with MC78M15ABDTG, MC7815CDTG trades extended temperature and accuracy for lower cost, while NCV78M15BDTRKG adds AEC-Q100 compliance at the expense of output tolerance - making MC78M15ABDTG optimal for non-automotive industrial and medical applications needing both wide temperature range and ±2% precision.

Availability

MC78M15ABDTG is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, and medical sensor interfaces requiring stable component supply with guaranteed −40°C to +125°C operation and ±2% output accuracy.

Supply support for MC78M15ABDTG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC78MxxA series was designed specifically for rugged, high-reliability local regulation in harsh environments - emphasizing thermal robustness, wide temperature operation, and intrinsic protection features without external components.

FAQ

What is the maximum input voltage rating for MC78M15ABDTG?

The MC78M15ABDTG has an absolute maximum input voltage of 40 Vdc (for 20–24 V output variants) and 35 Vdc for 5–18 V variants per datasheet Section "Maximum Ratings". For the 15 V version, VI(max) = 35 Vdc - exceeding this risks permanent damage even with brief transients.

Does MC78M15ABDTG require an input bypass capacitor?

Yes, MC78M15ABDTG requires a minimum 0.33 µF input bypass capacitor (tantalum, ceramic, or mylar) placed directly across pins 1 and 2. This stabilizes high-frequency response and prevents oscillation, especially when input traces exceed 2 inches or when driving large capacitive loads.

Can MC78M15ABDTG be used in parallel for higher current?

No, MC78M15ABDTG is not designed for parallel operation. Its output voltage tolerance (±2%) and lack of current-sharing circuitry cause unequal load distribution - one device may hog current and thermally shut down. Use a single higher-current regulator or external current-boosting circuit instead.

What is the thermal resistance junction-to-case (θ_JC) for MC78M15ABDTG?

The MC78M15ABDTG in DPAK-3 package has θ_JC = 5.0°C/W, measured from junction to the exposed thermal pad (pin 2/GND). This value assumes proper soldering to ≥1 in² of 2 oz. copper on the PCB - critical for achieving rated 500 mA output in ambient temperatures above 50°C.

Is MC78M15ABDTG pin-compatible with older TO-220 versions like MC78M15CTG?

No - MC78M15ABDTG uses DPAK-3 (3-pin, SMT) packaging with pinout Input-GND-Output, while MC78M15CTG uses TO-220 (3-pin, through-hole) with identical pinout but incompatible footprint and thermal interface. PCB redesign is required for migration.

MC78M15ABDTG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Bulk

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:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

MC78M15ABDTG FAQ

1.How can I place an order for MC78M15ABDTG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC78M15ABDTG 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 MC78M15ABDTG reliable?

The price and inventory of MC78M15ABDTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78M15ABDTG is usually 5 days.

3.What payment methods are accepted for MC78M15ABDTG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78M15ABDTG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC78M15ABDTG?

MC78M15ABDTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC78M15ABDTG 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 MC78M15ABDTG?

For technical support, including MC78M15ABDTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78M15ABDTG requirements.

6.How does Aetrix verify that MC78M15ABDTG is sourced from the original manufacturer or authorized distributors?

All MC78M15ABDTG 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 MC78M15ABDTG meets industry standards.

7.What is the process for return or replacement of MC78M15ABDTG?

All MC78M15ABDTG units undergo pre-shipment inspection (PSI). If there is an issue with MC78M15ABDTG, 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 MC78M15ABDTG part is unused and in its original packaging.

Return procedure for MC78M15ABDTG:

1.Submit a request within 90 days.

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

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