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onsemi MC79L15ABPRP
- Part No.:
- MC79L15ABPRP
- Manufacturer:
- onsemi
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
MC79L15ABPRP.pdf
- Description:
- IC REG LINEAR -15V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,742
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Product details
Overview
MC79L15ABPRP 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), thermal shutdown, and internal current limiting. It operates over −40°C to +125°C and requires no external components in basic configurations. It serves as an on-card negative supply for analog circuitry, op-amp biasing, and dual-rail signal conditioning.
For engineers reviewing the MC79L15ABPRP datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (1.7 V at 40 mA), ripple rejection (34–39 dB at 120 Hz), input voltage range (−17.5 V to −30 V), and TO-92 package compatibility with legacy through-hole designs.
Technical Context
This device implements a monolithic PNP pass transistor architecture with built-in thermal overload protection and short-circuit current limiting. Its regulation relies on internal bandgap reference and error amplifier feedback, enabling stable −15 V output without external compensation under typical loads.
It supports operation across industrial and extended temperature ranges (−40°C to +125°C) and exhibits 90 µV RMS output noise (10 Hz–100 kHz). Input bias current remains ≤6.5 mA at +25°C and ≤6.0 mA at +125°C, ensuring predictable quiescent behavior in low-power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | −15 V nominal, −14.4 V to −15.6 V at +25°C - ensures precise negative rail for analog ICs requiring tight DC accuracy |
| Output Current | 100 mA max - sufficient for biasing op-amps, comparators, and low-power logic in dual-supply systems |
| Dropout Voltage | 1.7 V at 40 mA - defines minimum input-to-output differential needed to maintain regulation |
| Ripple Rejection | 34 dB min at 120 Hz - attenuates AC line-frequency artifacts from unregulated negative supplies |
| Input Voltage Range | −17.5 V to −30 V - accommodates standard transformer-derived negative rails with margin for ripple |
| Thermal Shutdown | Active at +150°C junction - prevents catastrophic failure during sustained overload or poor heatsinking |
| Package | TO-92 (Case 29), Pb-free - compatible with manual assembly, wave soldering, and legacy PCB footprints |
Pinout & Package
MC79L15ABPRP uses the industry-standard TO-92 plastic package (Case 29), with straight leads and Pb-free finish. The package measures 4.45 mm × 5.20 mm × 4.19 mm (L × W × H) and features a 0.10 mm seating plane tolerance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground | Common reference node for input and output; must be low-impedance to avoid regulation error |
| 2 | Input | Negative input terminal; accepts unregulated −17.5 V to −30 V supply with ≥1.7 V headroom |
| 3 | Output | Regulated −15 V source; requires 0.1 µF ceramic capacitor for stability per datasheet Figure 3 |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables minimal BOM count and board space in cost-sensitive, low-current applications |
| Internal short-circuit current limiting | Prevents damage during output faults without external foldback circuitry |
| Internal thermal overload protection | Automatically disables output above +150°C junction temperature, resuming after cooldown |
| Pb-free TO-92 packaging | Meets RoHS compliance requirements while maintaining mechanical and thermal compatibility |
| −40°C to +125°C operating range | Supports deployment in automotive under-hood, industrial control, and outdoor embedded systems |
Applications
| Audio Signal Conditioning | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Dual-supply op-amp circuits in audio preamplifiers and active filters. IC Role / Device Role / Timing Role: Provides stable −15 V rail for symmetrical biasing of precision op-amps. Use Value: Enables rail-to-rail input common-mode range and low THD by eliminating Zener-based negative bias drift. |
Use Scenario: Powering bridge-based strain gauge or RTD signal chains in PLC I/O modules. IC Role / Device Role / Timing Role: Supplies regulated negative reference for instrumentation amplifiers and ADC drivers. Use Value: Reduces offset drift and improves CMRR by delivering low-noise (90 µV RMS), ripple-rejected (34 dB) negative supply. |
| Legacy Industrial Control | Test & Measurement Equipment |
|
Use Scenario: Retrofitting aging relay logic panels with modern analog monitoring circuitry. IC Role / Device Role / Timing Role: Replaces discrete resistor-Zener negative regulators with higher reliability and tighter tolerance. Use Value: Eliminates Zener leakage variation and thermal instability, extending calibration intervals and reducing field failures. |
Use Scenario: Bench power supplies and portable DMMs requiring isolated dual-rail outputs. IC Role / Device Role / Timing Role: Generates clean −15 V for analog front-end stages and reference buffers. Use Value: Maintains measurement accuracy via low dropout (1.7 V) and high PSRR (34 dB), minimizing supply-induced errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative fixed-voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7915CDT | SOIC-3 package, −15 V ±2%, 1.5 V dropout, higher ripple rejection (45 dB) | Surface-mount only; unsuitable for TO-92 footprint replacement | Select when board space is constrained and reflow assembly is available |
| MC7915CT | Higher current (1.5 A), TO-220 package, −15 V ±4%, 2.0 V dropout | Requires heatsink above ~250 mW; larger footprint and thermal mass | Select when load exceeds 100 mA or input voltage exceeds −30 V |
Compared with LM7915CDT and MC7915CT, MC79L15ABPRP offers lowest cost and smallest through-hole footprint for ≤100 mA applications, but trades off current capability and package flexibility - ideal for legacy-compatible, low-power analog subsystems.
Availability
MC79L15ABPRP is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio signal conditioning, and legacy control system upgrades requiring stable component supply and long-term obsolescence management.
Supply support for MC79L15ABPRP 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 (now onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MC79L00A Series was designed specifically for cost-sensitive, low-current negative voltage regulation in space-constrained and thermally modest environments - emphasizing ruggedness, simplicity, and broad temperature operation.
FAQ
What is the maximum input voltage rating for MC79L15ABPRP?
The MC79L15ABPRP has a maximum input voltage rating of −30 Vdc for the −15 V version, as specified in the Absolute Maximum Ratings table. Exceeding this value risks permanent damage due to junction breakdown or thermal runaway, even with thermal shutdown active. Always maintain ≥1.7 V headroom between input and output to ensure regulation.
Does MC79L15ABPRP require input and output capacitors for stable operation?
MC79L15ABPRP does not require external capacitors for basic regulation, but the datasheet recommends a 0.33 µF input bypass capacitor (tantalum or low-ESR ceramic) and a 0.1 µF output capacitor for stability-especially with long input traces or large load capacitance. These values prevent oscillation and improve transient response in real-world layouts.
What is the thermal resistance (RJA) of MC79L15ABPRP in its TO-92 package?
MC79L15ABPRP in the TO-92 (Case 29) package has a junction-to-ambient thermal resistance (RJA) of 160°C/W at TA = +25°C with no heatsink. This value assumes standard PCB mounting; actual RJA improves with copper pour area and airflow. Power dissipation must stay within limits to avoid triggering thermal shutdown at +150°C junction temperature.
Can MC79L15ABPRP replace older MC79L15AC variants in existing designs?
Yes - MC79L15ABPRP is a direct drop-in replacement for MC79L15AC variants in most cases, sharing identical pinout, electrical specs, and TO-92 package. The "B" suffix denotes −40°C to +125°C operation (vs. 0°C to +125°C for "C"), offering broader temperature coverage without layout changes or performance trade-offs.
How does the ripple rejection of MC79L15ABPRP compare across frequency bands?
MC79L15ABPRP provides 34 dB minimum ripple rejection at 120 Hz (line frequency), decreasing at higher frequencies. Its rejection profile is optimized for rectified AC inputs; it does not specify performance beyond 120 Hz in the datasheet. For high-frequency noise suppression, external LC filtering upstream is recommended alongside the standard 0.33 µF input capacitor.
MC79L15ABPRP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
MC79L15ABPRP FAQ
1.How can I place an order for MC79L15ABPRP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC79L15ABPRP 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 MC79L15ABPRP reliable?
The price and inventory of MC79L15ABPRP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC79L15ABPRP is usually 5 days.
3.What payment methods are accepted for MC79L15ABPRP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC79L15ABPRP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC79L15ABPRP?
MC79L15ABPRP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC79L15ABPRP 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 MC79L15ABPRP?
For technical support, including MC79L15ABPRP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC79L15ABPRP requirements.
6.How does Aetrix verify that MC79L15ABPRP is sourced from the original manufacturer or authorized distributors?
All MC79L15ABPRP 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 MC79L15ABPRP meets industry standards.
7.What is the process for return or replacement of MC79L15ABPRP?
All MC79L15ABPRP units undergo pre-shipment inspection (PSI). If there is an issue with MC79L15ABPRP, 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 MC79L15ABPRP part is unused and in its original packaging.
Return procedure for MC79L15ABPRP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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