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

onsemi MC79L15ABDR2

Name: MC79L15ABDR2
Brand: onsemi
SKU: MC79L15ABDR2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC79L15ABDR2

Manufacturer:: onsemi

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

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: MC79L15ABDR2.pdf

Description:: IC REG LINEAR -15V 100MA 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC79L15ABDR2 from ON Semiconductor is a 100 mA negative fixed-voltage linear regulator delivering −15 V output with ±4% tolerance (−14.4 V to −15.6 V at +25°C), 1.7 V dropout at 40 mA, and thermal shutdown/current limiting protection. It operates across −40°C to +125°C and is used in on-card regulation for analog signal chains, sensor biasing, and dual-rail op-amp supplies.

For engineers reviewing the MC79L15ABDR2 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed −15 V output stability under 100 mA load, SOIC-8 package compatibility with automated assembly, automotive-grade temperature range, and absence of required external compensation components.

Technical Context

This device implements a monolithic bipolar linear regulator architecture with internal current-limit threshold and thermal foldback circuitry. Its fixed −15 V output is achieved via precision resistor network trimming during wafer sort, and regulation is maintained without external capacitors under typical PCB layout conditions.

Input voltage range spans −17.5 V to −30 V for full-spec operation, with ripple rejection of 34 dB (min) at 120 Hz and output noise of 90 µV RMS (typ) over 10 Hz–100 kHz. The design targets low-power analog subsystems where ground-referenced negative rail integrity is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	−15 V nominal, −14.4 V to −15.6 V (min/max) at +25°C - ensures stable bias for precision op-amps and ADC references.
Output Current	100 mA maximum - supports low-power analog circuits including instrumentation amplifiers and sensor interfaces.
Dropout Voltage	1.7 V at 40 mA - enables operation with input as low as −16.7 V while maintaining regulation.
Input Voltage Range	−17.5 V to −30 V - compatible with standard −24 V industrial rails and filtered transformer-derived supplies.
Ripple Rejection	34 dB min at 120 Hz - suppresses rectified AC line noise in dual-supply systems.
Operating Temperature	−40°C to +125°C - qualified for under-hood automotive and industrial control environments.
Thermal Protection	Internal junction shutdown at +150°C - prevents catastrophic failure during sustained overload or poor heatsinking.

Pinout & Package

MC79L15ABDR2 is housed in an SOIC-8 (Case 751) surface-mount package with exposed pad not electrically connected. Pin 1 is V_OUT, Pin 2 is V_IN, Pin 3 is V_IN, Pin 4 is NC, Pin 5 is GND, Pin 6 is V_IN, Pin 7 is V_IN, Pin 8 is NC - enabling flexible PCB routing with multiple input connections and dedicated ground return.

Pin/Terminal	Circuit Role	Design Meaning
1	V_OUT	Regulated −15 V output node - connects directly to load and local bypass capacitor (0.1 µF).
2, 3, 6, 7	V_IN	Input voltage terminals - paralleled internally; reduces trace inductance and improves high-frequency PSRR.
4, 8	NC	No connection - must remain unconnected per datasheet; no internal bonding or function.
5	GND	Ground reference for regulation and feedback - requires low-impedance return path to minimize error.

Key Features

Feature	Design Value
No external components required	Stable operation with only 0.33 µF input and 0.1 µF output ceramic capacitors - eliminates BOM cost and layout complexity.
Internal short-circuit current limiting	Self-limiting to ~150 mA - protects against wiring faults and output shorts without external fusing.
Internal thermal overload protection	Automatic shutdown at +150°C junction temperature - prevents permanent damage during transient overloads.
Pb-free SOIC-8 packaging	RoHS-compliant lead finish with JEDEC-standard footprint - supports automated reflow and long-term supply chain compliance.
Automotive-grade qualification	Specified for −40°C to +125°C operation with extended reliability testing - meets AEC-Q100 stress requirements for non-safety-critical modules.

Applications

Industrial Sensor Signal Conditioning	Automotive Instrument Cluster Power
Use Scenario: Providing clean −15 V bias to strain-gauge bridge amplifiers and 16-bit SAR ADC reference buffers in factory-floor transmitters. IC Role / Device Role / Timing Role: Negative rail generator for dual-supply op-amps and precision voltage references. Use Value: Maintains 0.1% gain accuracy over temperature by eliminating Zener drift and reducing thermal coupling between regulator and signal path.	Use Scenario: Supplying −15 V to LCD segment drivers and CAN transceiver bias circuits in dashboard control units operating at −40°C ambient. IC Role / Device Role / Timing Role: Fixed negative voltage source for display interface ICs and isolated communication peripherals. Use Value: Delivers guaranteed regulation down to −40°C without startup delay or brownout, supporting cold-cranking compliance.
Test Equipment Dual-Rail Supplies	Medical Diagnostic Front-End Biasing
Use Scenario: Generating matched ±15 V rails in portable multimeters and handheld oscilloscope analog front-ends using complementary MC78L15/MC79L15 pairs. IC Role / Device Role / Timing Role: Symmetrical negative rail generator synchronized with positive counterpart for rail-to-rail op-amp operation. Use Value: Enables <1 mV offset drift over time due to matched thermal coefficients and identical quiescent current behavior.	Use Scenario: Biasing photodiode TIA stages and low-noise instrumentation amplifiers in ultrasound beamformer modules. IC Role / Device Role / Timing Role: Low-noise negative supply for analog signal chain components requiring sub-10 µV RMS noise floor. Use Value: Contributes <90 µV RMS integrated noise (10 Hz–100 kHz), minimizing baseline wander in microvolt-level bio-potential measurements.

Industrial Sensor Signal Conditioning

Automotive Instrument Cluster Power

Use Scenario: Providing clean −15 V bias to strain-gauge bridge amplifiers and 16-bit SAR ADC reference buffers in factory-floor transmitters.

IC Role / Device Role / Timing Role: Negative rail generator for dual-supply op-amps and precision voltage references.

Use Value: Maintains 0.1% gain accuracy over temperature by eliminating Zener drift and reducing thermal coupling between regulator and signal path.

Use Scenario: Supplying −15 V to LCD segment drivers and CAN transceiver bias circuits in dashboard control units operating at −40°C ambient.

IC Role / Device Role / Timing Role: Fixed negative voltage source for display interface ICs and isolated communication peripherals.

Use Value: Delivers guaranteed regulation down to −40°C without startup delay or brownout, supporting cold-cranking compliance.

Test Equipment Dual-Rail Supplies

Medical Diagnostic Front-End Biasing

Use Scenario: Generating matched ±15 V rails in portable multimeters and handheld oscilloscope analog front-ends using complementary MC78L15/MC79L15 pairs.

IC Role / Device Role / Timing Role: Symmetrical negative rail generator synchronized with positive counterpart for rail-to-rail op-amp operation.

Use Value: Enables <1 mV offset drift over time due to matched thermal coefficients and identical quiescent current behavior.

Use Scenario: Biasing photodiode TIA stages and low-noise instrumentation amplifiers in ultrasound beamformer modules.

IC Role / Device Role / Timing Role: Low-noise negative supply for analog signal chain components requiring sub-10 µV RMS noise floor.

Use Value: Contributes <90 µV RMS integrated noise (10 Hz–100 kHz), minimizing baseline wander in microvolt-level bio-potential measurements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar negative fixed-voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM7915CDT/NOPB	Same −15 V output, but wider input range (−35 V max), higher dropout (2.0 V), and TO-220/SOIC-3 packages only - no SOIC-8 variant.	Requires larger PCB area or different thermal management; lacks multi-V_IN pin configuration for low-inductance routing.	Select when higher input voltage margin is needed and SOIC-8 footprint is not mandatory.
MC79L15ACDR2G	Same SOIC-8 package and −15 V output, but commercial temperature range (0°C to +125°C) instead of automotive (−40°C to +125°C).	Not qualified for extended cold-temperature operation; unsuitable for under-hood or outdoor industrial deployments.	Select for cost-sensitive consumer or lab equipment where full automotive temp range is unnecessary.

Compared with LM7915CDT/NOPB and MC79L15ACDR2G, MC79L15ABDR2 uniquely combines automotive temperature rating, SOIC-8 footprint with four V_IN pins for low-impedance power delivery, and guaranteed −15 V output tolerance - making it optimal for space-constrained, thermally demanding embedded analog systems.

Availability

MC79L15ABDR2 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive instrument clusters, and test equipment dual-rail supplies requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC79L15ABDR2 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC79L00A Series was designed specifically for cost-sensitive, low-current negative voltage regulation in space-constrained PCBs - emphasizing ruggedness, simplicity, and broad temperature capability without external components.

FAQ

What is the maximum input voltage for MC79L15ABDR2?

The absolute maximum input voltage for MC79L15ABDR2 is −30 V DC under normal operating conditions, with derating required above +25°C ambient. At −40°C to +125°C junction temperature, the recommended maximum is −30 V for reliable long-term operation - exceeding this risks permanent damage per the Absolute Maximum Ratings table.

Does MC79L15ABDR2 require input and output capacitors?

MC79L15ABDR2 functions stably without external capacitors in basic applications, but ON Semiconductor recommends a 0.33 µF input capacitor (tantalum or ceramic) and 0.1 µF output capacitor for improved transient response and high-frequency stability. These values are validated in the datasheet's Figure 3 standard application circuit.

Is MC79L15ABDR2 pin-compatible with other regulators in the MC79L00A family?

Yes, all MC79L00A Series devices in SOIC-8 package share identical pinout: Pin 1 = V_OUT, Pins 2/3/6/7 = V_IN, Pin 4/8 = NC, Pin 5 = GND. This allows direct substitution of MC79L15ABDR2 for MC79L12ABDR2 or MC79L05ABDR2 in the same footprint when only output voltage differs.

What is the thermal resistance of MC79L15ABDR2 in SOIC-8 package?

The SOIC-8 (Case 751) package of MC79L15ABDR2 has a junction-to-ambient thermal resistance (R_JA) of 180°C/W at TA = +25°C with minimum recommended copper pad size, and junction-to-case (R_JC) of 45°C/W. These values assume proper PCB copper pour per Figure 9 in the datasheet.

Can MC79L15ABDR2 be used in automotive applications?

Yes, MC79L15ABDR2 is explicitly rated for −40°C to +125°C operation and qualifies as an automotive-grade part per ON Semiconductor's ordering information. It undergoes additional reliability testing for automotive use cases, though it is not AEC-Q100 certified - intended for non-safety-critical modules like infotainment and body electronics.

MC79L15ABDR2 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Negative

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: -35V

Voltage - Output (Min/Fixed):: -15V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 1.7V @ 40mA (Typ)

Current - Output:: 100mA

Current - Quiescent (Iq):: -

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

MC79L15ABDR2 FAQ

1.How can I place an order for MC79L15ABDR2 through Aetrix?

Please submit a Request for Quotation (RFQ) for MC79L15ABDR2 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 MC79L15ABDR2 reliable?

The price and inventory of MC79L15ABDR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC79L15ABDR2 is usually 5 days.

3.What payment methods are accepted for MC79L15ABDR2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC79L15ABDR2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC79L15ABDR2?

MC79L15ABDR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC79L15ABDR2 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 MC79L15ABDR2?

For technical support, including MC79L15ABDR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC79L15ABDR2 requirements.

6.How does Aetrix verify that MC79L15ABDR2 is sourced from the original manufacturer or authorized distributors?

All MC79L15ABDR2 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 MC79L15ABDR2 meets industry standards.

7.What is the process for return or replacement of MC79L15ABDR2?

All MC79L15ABDR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC79L15ABDR2, 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 MC79L15ABDR2 part is unused and in its original packaging.

Return procedure for MC79L15ABDR2:

1.Submit a request within 90 days.

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

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