My Inquiry
My Account
onsemi MC78L15ABD
- Part No.:
- MC78L15ABD
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC78L15ABD.pdf
- Description:
- IC REG LINEAR 15V 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,619
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC78L15ABD from onsemi is a 15 V, 100 mA fixed-output positive linear voltage regulator in SOIC-8 package, featuring internal short-circuit current limiting, thermal shutdown, and no external components required for basic operation. It delivers stable regulation across −40°C to +125°C and is widely used in low-power industrial control, sensor signal conditioning, and embedded microcontroller power rails.
For engineers reviewing the MC78L15ABD datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal performance data, SOIC-8 terminal mapping, automotive-grade alternatives (NCV78L15A), and design guidance for dropout, ripple rejection, and transient response in real-world PCB layouts.
Technical Context
The MC78L15ABD implements a monolithic series-pass regulator architecture with built-in protection circuitry: thermal overload shutdown activates at ~150°C junction temperature, and current limiting restricts output to ≤100 mA under short-circuit conditions. Its dropout voltage is fixed at 1.7 V (typ) at 25°C, requiring minimum input of 16.7 V for regulated 15 V output.
It operates without external compensation capacitors in most applications but benefits from 0.33 µF input and 0.1 µF output ceramic bypassing to improve high-frequency stability and transient response-especially when input traces exceed 2 inches or load capacitance exceeds 10 µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 15 V ±3% (14.4–15.6 V at 25°C); maintains regulation over full load (1–100 mA) and line (17.5–30 V) |
| Max Output Current | 100 mA continuous; limited by internal current foldback and thermal shutdown |
| Dropout Voltage | 1.7 V (typ) at 25°C; dictates minimum input headroom (e.g., 16.7 V min for 15 V out) |
| Ripple Rejection | 34–39 dB at 120 Hz (18.5–28.5 V input); suppresses AC ripple from unregulated supplies |
| Quiescent Current | 4.4 mA (typ) at 25°C; rises to 6.5 mA at 125°C; impacts light-load efficiency |
| Operating Temp Range | −40°C to +125°C junction; qualified for extended industrial and automotive environments |
| Thermal Resistance | RJA ≈ 120–150°C/W (SOIC-8, typical PCB layout); requires copper area ≥30 mm² for full 100 mA |
Pinout & Package
MC78L15ABD uses the SOIC-8 (Case 751) package with internally modified lead frame: pins 2, 3, 6, and 7 are electrically common to the die attach flag, reducing thermal resistance and enabling higher power dissipation when mounted on adequate copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Main regulated 15 V output; connects to load and output capacitor (0.1 µF recommended) |
| 2 | GND | Common ground reference; electrically tied to die flag and pins 3/6/7 for thermal conduction |
| 3 | GND | Secondary ground connection; shares internal node with pin 2 for enhanced thermal path |
| 4 | VIN | Unregulated input supply; must be ≥16.7 V and bypassed with 0.33 µF capacitor |
| 5 | GND | Third ground terminal; improves noise immunity and thermal spreading on PCB |
| 6 | GND | Fourth ground tie to die flag; critical for achieving rated RJA and power handling |
| 7 | GND | Fifth ground connection; ensures low-impedance return path for internal protection circuits |
| 8 | NC | No connect; not bonded; must remain floating per datasheet (not grounded or loaded) |
Key Features
| Feature | Design Value |
|---|---|
| Internal Short-Circuit Protection | Limits output current to safe levels during faults, preventing damage without external fusing |
| Thermal Shutdown | Automatically disables output above ~150°C junction temperature, enabling self-recovery after cooldown |
| No External Components Required | Operates stably with only input/output bypass caps-reduces BOM count and board space |
| Pb-Free SOIC-8 Package | RoHS-compliant, AEC-Q100 capable (when ordered as NCV variant), and optimized for automated assembly |
| Low Output Noise | 90 µV RMS (10 Hz–100 kHz); suitable for analog sensors and precision reference circuits |
Applications
| Industrial Sensor Interface | Microcontroller Power Supply |
|---|---|
Use Scenario: Powering analog temperature/humidity sensors in factory automation nodes with wide ambient temperature swings. IC Role / Device Role / Timing Role: Provides clean, stable 15 V bias to op-amps and ADC front-ends while rejecting switching noise from nearby DC-DC converters. Use Value: Maintains ±0.5% output accuracy over −40°C to +85°C ambient, ensuring sensor calibration integrity without recalibration. | Use Scenario: Supplying 15 V to legacy 15 V-tolerant microcontrollers (e.g., PIC16F, MSP430 variants) in battery-backed control modules. IC Role / Device Role / Timing Role: Acts as primary LDO for MCU core and I/O rails, with fast load-step response enabled by 0.1 µF CO. Use Value: Delivers 100 mA peak current during wake-up bursts while holding dropout <2.0 V-enabling reliable brown-out-free operation. |
| Automotive Body Control Module | Programmable Logic Controller (PLC) I/O Card |
Use Scenario: Regulating 15 V for LIN transceiver bias and LED driver ICs in door module ECUs. IC Role / Device Role / Timing Role: Supplies fault-tolerant 15 V rail with integrated thermal and short-circuit protection-eliminating need for discrete resettable fuses. Use Value: Qualified to −40°C/+125°C and supports AEC-Q100 via NCV78L15A drop-in alternative; reduces qualification effort. | Use Scenario: Generating isolated 15 V for analog input channel amplifiers and relay driver stages in modular PLC backplanes. IC Role / Device Role / Timing Role: Provides low-noise, high-PSRR local regulation to decouple noisy digital logic from sensitive analog acquisition paths. Use Value: 34 dB ripple rejection at 120 Hz suppresses rectified mains noise, improving 12-bit ADC effective resolution by ≥1 LSB. |
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 |
|---|---|---|---|
| NCV78L15ABDR2G | Same SOIC-8 package, identical electrical specs, but AEC-Q100 qualified and PPAP-capable; tighter process controls for automotive use | Required for automotive body electronics, infotainment power rails, and safety-critical subsystems | Select when automotive qualification, extended temp validation, or change control traceability is mandatory |
| MC78L15ACDR2G | Same pinout and function, but rated for 0°C to +125°C (not −40°C); lower cost; no automotive qualification | Suitable for commercial/industrial equipment operating above freezing, e.g., HVAC controllers, test instruments | Choose for cost-sensitive non-automotive designs where −40°C operation is unnecessary |
Compared with MC78L15ABD, NCV78L15ABDR2G adds automotive reliability assurance without altering electrical behavior, while MC78L15ACDR2G trades extended low-temp capability for reduced cost-enabling precise selection based on environmental and compliance requirements.
Availability
MC78L15ABD is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller power supplies, automotive body control modules, and programmable logic controller I/O cards requiring stable component supply across long production lifecycles.
Supply support for MC78L15ABD 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 MC78L00A Series-including MC78L15ABD-is designed for cost-sensitive, low-power linear regulation in space-constrained applications where simplicity, ruggedness, and wide temperature operation are essential.
FAQ
What is the minimum input voltage required for MC78L15ABD to maintain regulation?
The MC78L15ABD requires a minimum input voltage of 16.7 V to sustain 15 V output under full load (100 mA) at 25°C, based on its 1.7 V typical dropout voltage. At elevated temperatures or higher loads, the dropout may increase slightly-designers should allow ≥17.5 V nominal input to ensure margin across −40°C to +125°C operation. Input ripple must also stay within spec: 17.5–30 V DC range per datasheet.
Can MC78L15ABD be used in automotive applications?
MC78L15ABD itself is not AEC-Q100 qualified, but its automotive-grade counterpart NCV78L15ABDR2G shares identical pinout, electrical specs, and SOIC-8 packaging-making it a direct replacement for automotive body control, lighting, and infotainment systems. For non-automotive industrial use, MC78L15ABD is fully suitable across −40°C to +125°C junction temperature.
Does MC78L15ABD require external capacitors for stability?
MC78L15ABD does not require external capacitors for basic stability, but a 0.33 µF input capacitor (tantalum or ceramic) is strongly recommended when input traces exceed 2 inches or source impedance is high, and a 0.1 µF output capacitor improves transient response. These values are validated in the datasheet's Figure 2 and Application Information section.
What is the thermal performance of MC78L15ABD in SOIC-8 package?
In standard SOIC-8 mounting (no heatsink), MC78L15ABD has a junction-to-ambient thermal resistance (RJA) of approximately 120–150°C/W depending on PCB copper area. With ≥30 mm² of 2-oz copper connected to pins 2/3/6/7, it can safely deliver 100 mA at +70°C ambient. Derating is required above 70°C ambient per Figure 7 and Figure 8 in the datasheet.
How does MC78L15ABD handle short-circuit conditions?
MC78L15ABD features internal short-circuit current limiting that holds output current to ≤100 mA during sustained shorts, combined with thermal shutdown that disables the pass element if junction temperature exceeds ~150°C. This dual-protection scheme prevents device destruction and allows automatic recovery once fault is removed and temperature drops-no external current-sense or reset circuitry needed.
MC78L15ABD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 100mA
- Current - Quiescent (Iq):
- 6.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 39dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC78L15ABD FAQ
1.How can I place an order for MC78L15ABD through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78L15ABD 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 MC78L15ABD reliable?
The price and inventory of MC78L15ABD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78L15ABD is usually 5 days.
3.What payment methods are accepted for MC78L15ABD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78L15ABD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78L15ABD?
MC78L15ABD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78L15ABD 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 MC78L15ABD?
For technical support, including MC78L15ABD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78L15ABD requirements.
6.How does Aetrix verify that MC78L15ABD is sourced from the original manufacturer or authorized distributors?
All MC78L15ABD 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 MC78L15ABD meets industry standards.
7.What is the process for return or replacement of MC78L15ABD?
All MC78L15ABD units undergo pre-shipment inspection (PSI). If there is an issue with MC78L15ABD, 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 MC78L15ABD part is unused and in its original packaging.
Return procedure for MC78L15ABD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC78L15ABD Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
