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onsemi SC79L05ABDR2G
- Part No.:
- SC79L05ABDR2G
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
SC79L05ABDR2G.pdf
- Description:
- IC REG LINEAR NEG 5V 100MA 5V
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Product details
Overview
SC79L05ABDR2G from onsemi is a −5.0 V, 100 mA fixed negative voltage regulator in SOIC-8 package, featuring internal thermal shutdown and short-circuit current limiting. It delivers stable regulation for low-power analog circuits, sensor biasing, and dual-rail op-amp supplies where input voltage ranges from −7.0 V to −20 V and dropout remains ≤1.7 V at 40 mA.
For engineers reviewing the SC79L05ABDR2G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed operation across −40 °C to +125 °C, 41–49 dB ripple rejection at 120 Hz, ±2.5% output voltage tolerance (−4.875 V to −5.125 V), and no external compensation requirement in most designs.
Technical Context
The SC79L05ABDR2G implements a monolithic bipolar linear regulator architecture with built-in thermal overload protection and foldback current limiting. Its internal circuitry maintains regulation without external capacitors under typical load conditions, though 0.33 µF input and 0.1 µF output bypassing are recommended for stability with long trace lengths or large capacitive loads.
It operates over an extended industrial temperature range (−40 °C to +125 °C) and supports input voltages up to −30 V for −5 V output. Dropout voltage is specified at 1.7 V (typical) at 40 mA and 25 °C, and output noise is 40 µVRMS (10 Hz–100 kHz), making it suitable for noise-sensitive analog subsystems requiring clean negative rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | −5.0 V ±2.5% (−4.875 V to −5.125 V) at 25 °C, ensuring compatibility with standard −5 V logic and analog interfaces |
| Max Output Current | 100 mA continuous - sufficient for low-power op-amps, comparators, and precision sensors |
| Dropout Voltage | ≤1.7 V at 40 mA and 25 °C - enables use with modest input headroom (e.g., −7 V input for −5 V output) |
| Ripple Rejection | 41–49 dB at 120 Hz - suppresses rectified AC ripple in dual-supply systems |
| Operating Temp Range | −40 °C to +125 °C - qualified for automotive under-hood and industrial control environments |
| Thermal Protection | Internal thermal shutdown - prevents damage during sustained overload or poor heatsinking |
| Short-Circuit Limit | Internal foldback current limiting - sustains safe operation during output faults without external components |
Pinout & Package
SC79L05ABDR2G is housed in a Pb-free SOIC-8 (Case 751-07) package, 4.9 mm × 3.9 mm × 1.5 mm, with gull-wing leads and 1.27 mm pitch. Thermal resistance is 180 °C/W (junction-to-ambient, min pad) and 45 °C/W (junction-to-case).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated −5.0 V output - connects directly to load; requires 0.1 µF local bypass for transient response |
| 2 | VIN | Negative input supply - must be ≤−7.0 V for regulation; 0.33 µF bypass recommended if >5 cm from filter |
| 3 | VIN | Second input terminal - internally tied to Pin 2; improves current handling and thermal distribution |
| 4 | NC | No connection - floating; must not be soldered or tied to any net |
| 5 | GND | Ground reference - common return for input and output; critical for stability; minimize ground loop impedance |
| 6 | VIN | Third input terminal - internally tied to Pins 2 and 3; enhances power dissipation capability |
| 7 | VIN | Fourth input terminal - internally tied to Pins 2, 3, and 6; distributes input current across multiple bond wires |
| 8 | NC | No connection - floating; must remain unconnected per datasheet layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Operates stably with only input/output bypass caps - reduces BOM count and PCB area in space-constrained designs |
| Internal short-circuit current limiting | Foldback protection limits peak fault current to ~120 mA - avoids fuse reliance and enables auto-recovery |
| Internal thermal overload protection | Shuts down at ~150 °C junction temperature - prevents permanent damage during ambient or load transients |
| Pb-free SOIC-8 packaging | RoHS-compliant, surface-mountable package with industry-standard footprint - compatible with automated reflow assembly |
| −40 °C to +125 °C operating range | Qualified for extended temperature applications - eliminates derating concerns in automotive and industrial enclosures |
Applications
| Industrial Sensor Signal Conditioning | Dual-Supply Op-Amp Biasing |
|---|---|
|
Use Scenario: Providing clean −5.0 V rail to precision instrumentation amplifiers and ADC drivers in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Negative voltage regulator supplying reference-biased analog front-end stages. Use Value: Maintains ±2.5% output accuracy across −40 °C to +125 °C, enabling <1 LSB error in 12-bit sensor digitization without calibration drift. |
Use Scenario: Generating matched ±5.0 V supplies for rail-to-rail op-amps in programmable logic controller (PLC) analog I/O modules. IC Role / Device Role / Timing Role: Complementary negative regulator paired with MC78L05 series for symmetrical dual-rail generation. Use Value: 49 dB ripple rejection at 120 Hz ensures <1 mV RMS noise on −5 V rail, preserving op-amp CMRR and THD performance. |
| Automotive Body Control Module (BCM) | Legacy Industrial Control Interface |
|
Use Scenario: Powering CAN transceiver bias circuitry and microcontroller peripherals in under-dash BCMs exposed to engine bay thermal cycling. IC Role / Device Role / Timing Role: Robust negative supply source with thermal shutdown for safety-critical sub-systems. Use Value: Guaranteed operation to +125 °C and internal current limiting enable reliable function without external thermal monitoring or current sense. |
Use Scenario: Replacing obsolete discrete Zener-resistor regulators in legacy PLC backplanes and motor drive interface cards. IC Role / Device Role / Timing Role: Drop-in upgrade delivering tighter regulation, lower noise, and integrated protection vs. passive solutions. Use Value: Eliminates need for 5% tolerance Zeners and ballast resistors - reduces parts count by ≥3 and improves long-term voltage drift stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC79L05ABDR2G | Same device family, identical electrical specs and SOIC-8 footprint - direct replacement with identical marking and qualification. | No functional difference; same −40 °C to +125 °C rating and Pb-free compliance. | Select when sourcing from alternate authorized distributors or requiring identical onsemi branding and traceability. |
| LM79L05ACM/NOPB | ±5% output tolerance (−4.75 V to −5.25 V), 0 °C to +70 °C temp range, TO-92 package - looser accuracy and narrower temperature envelope. | Suitable only for commercial-grade, non-automotive applications with relaxed thermal and precision requirements. | Choose only for cost-sensitive, non-extended-temp designs where ±5% regulation and TO-92 mounting are acceptable. |
Compared with MC79L05ABDR2G and LM79L05ACM/NOPB, SC79L05ABDR2G provides tighter ±2.5% output tolerance and full −40 °C to +125 °C operation in SOIC-8 - making it the sole option for AEC-Q100-aligned or high-reliability industrial deployments requiring guaranteed performance across extreme ambient conditions.
Availability
SC79L05ABDR2G is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, dual-supply op-amp biasing, and automotive body control module (BCM) applications requiring stable component supply, extended temperature qualification, and RoHS-compliant packaging.
Supply support for SC79L05ABDR2G 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, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MC79L00A Series, including SC79L05ABDR2G, was designed to replace discrete Zener-resistor regulators with integrated, thermally protected, low-cost fixed negative voltage regulation for space- and reliability-constrained embedded systems.
FAQ
What is the maximum input voltage for SC79L05ABDR2G?
The SC79L05ABDR2G supports a maximum input voltage of −30 V DC when regulating −5.0 V output. This rating applies at TA = +25 °C; derating is required at higher ambient temperatures per the thermal resistance curves in the datasheet. Exceeding −30 V risks permanent damage due to junction breakdown, even with thermal protection active.
Does SC79L05ABDR2G require external capacitors to operate?
The SC79L05ABDR2G does not require external capacitors for basic regulation, but 0.33 µF input and 0.1 µF output ceramic or tantalum capacitors are strongly recommended. These improve transient response, suppress high-frequency noise, and ensure stability when traces exceed 5 cm or load capacitance exceeds 100 nF - per Figure 3 and Applications Information section of the datasheet.
What is the output voltage tolerance of SC79L05ABDR2G over temperature?
The SC79L05ABDR2G guarantees −5.0 V output within ±2.5% (−4.875 V to −5.125 V) over its full operating temperature range of −40 °C to +125 °C. This is confirmed in the Electrical Characteristics table for MC79L05AC/AB devices under TJ = −40 °C to +125 °C test conditions.
Can SC79L05ABDR2G be used in parallel to increase current capacity?
No - SC79L05ABDR2G is not designed for parallel operation. Its internal current-limiting and thermal shutdown mechanisms are not synchronized, leading to unequal current sharing and potential thermal runaway. For >100 mA requirements, select a higher-current regulator such as MC79M05 or switch to a DC-DC solution.
Is SC79L05ABDR2G pin-compatible with older MC79L05 variants?
Yes - SC79L05ABDR2G uses the same SOIC-8 pinout (Pins 1=VOUT, 2/3/6/7=VIN, 5=GND, 4/8=NC) as MC79L05ABDR2G and MC79L05ACDR2G. All share identical mechanical dimensions, thermal pad layout, and electrical behavior; only temperature grade and output tolerance differ between AB (−40 °C to +125 °C, ±2.5%) and AC (0 °C to +125 °C, ±5%).
SC79L05ABDR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SC79L05ABDR2G FAQ
1.How can I place an order for SC79L05ABDR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for SC79L05ABDR2G 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 SC79L05ABDR2G reliable?
The price and inventory of SC79L05ABDR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC79L05ABDR2G is usually 5 days.
3.What payment methods are accepted for SC79L05ABDR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC79L05ABDR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC79L05ABDR2G?
SC79L05ABDR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC79L05ABDR2G 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 SC79L05ABDR2G?
For technical support, including SC79L05ABDR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC79L05ABDR2G requirements.
6.How does Aetrix verify that SC79L05ABDR2G is sourced from the original manufacturer or authorized distributors?
All SC79L05ABDR2G 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 SC79L05ABDR2G meets industry standards.
7.What is the process for return or replacement of SC79L05ABDR2G?
All SC79L05ABDR2G units undergo pre-shipment inspection (PSI). If there is an issue with SC79L05ABDR2G, 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 SC79L05ABDR2G part is unused and in its original packaging.
Return procedure for SC79L05ABDR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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