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onsemi NCV78L12ABPG
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- Part No.:
- NCV78L12ABPG
- Manufacturer:
- onsemi
- Package:
- TO-226-3, TO-92-3 Long Body
- Datasheet:
-
NCV78L12ABPG.pdf
- Description:
- IC REG LINEAR 12V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,941
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Product details
Overview
NCV78L12ABPG from onsemi is an automotive-grade, 12 V fixed-output linear voltage regulator in TO-92 package, delivering up to 100 mA with ±2.5% output voltage tolerance (11.5–12.5 V), 1.7 V dropout, and internal thermal shutdown and short-circuit protection. It operates across −40°C to +125°C and is AEC-Q100 qualified for engine control units and body electronics.
For engineers reviewing the NCV78L12ABPG datasheet, pinout, applications, or equivalent options, key selection factors include its automotive temperature range, TO-92 thermal resistance (200°C/W), 42 dB ripple rejection at 120 Hz, and compatibility with minimal external components in low-power sensor supply rails.
Technical Context
The NCV78L12ABPG uses a monolithic bipolar architecture with internal current limiting and thermal foldback. Its regulation relies on a stable bandgap reference and error amplifier driving a pass transistor, enabling operation without external compensation capacitors in most applications.
It requires a minimum input-to-output differential of 1.7 V to maintain regulation and exhibits load regulation of ≤100 mV over 1–100 mA output current. Input bias current remains below 6.5 mA across temperature and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12 V ±2.5% (11.5–12.5 V) at TJ = +25°C - ensures stable MCU/sensor rail under automotive ambient extremes |
| Max Output Current | 100 mA - sufficient for microcontrollers, CAN transceivers, and analog sensors without heatsinking |
| Dropout Voltage | 1.7 V typical - enables use with 13.5 V nominal automotive battery down to ~13.7 V before regulation loss |
| Ripple Rejection | 42 dB at 120 Hz - suppresses alternator ripple in vehicle power systems |
| Operating Temp | −40°C to +125°C - validated for under-hood and transmission control module environments |
| Thermal Resistance | 200°C/W (Junction-to-Ambient, TO-92) - defines maximum power dissipation (≤625 mW at 25°C ambient) |
| AEC-Q100 Grade | Grade 1 qualified - meets automotive reliability and stress test requirements for safety-critical subsystems |
Pinout & Package
NCV78L12ABPG is housed in a Pb-free TO-92 (Case 29-10) plastic package with bent leads, rated for 1 W dissipation. Pin 1 is Output, Pin 2 is Ground, Pin 3 is Input - verified per datasheet Figure 1 and Ordering Information table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output (VOUT) | Regulated 12 V supply node - connects directly to load; no external sense line required |
| 2 | Ground (GND) | Common reference for input and output - must share ground plane with upstream filter and downstream loads |
| 3 | Input (VIN) | Unregulated DC input - requires ≥13.7 V minimum to sustain regulation under worst-case dropout and ripple |
Key Features
| Feature | Design Value |
|---|---|
| Internal Thermal Shutdown | Activates at TJ ≥150°C - prevents permanent damage during sustained overload or poor PCB heat sinking |
| Short-Circuit Current Limit | Internally clamps output current to safe level - eliminates need for external fuse or current-sense circuitry |
| No External Components Required | Stable with only optional 0.33 µF input and 0.1 µF output bypass caps - reduces BOM count and layout area |
| AEC-Q100 Qualified | Validated for automotive production - supports PPAP documentation and zero-defect manufacturing requirements |
| Pb-Free Construction | RoHS-compliant TO-92 package - meets global environmental compliance mandates without performance trade-offs |
Applications
| Engine Control Unit (ECU) Sensor Supply | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Powering crankshaft position sensor and knock sensor in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Provides clean, stable 12 V bias to analog front-end circuitry and Hall-effect ICs. Use Value: Maintains regulation despite battery voltage sag to 9 V during cranking due to 1.7 V dropout and wide input range (up to 35 V). | Use Scenario: Supplying door lock actuators, interior lighting drivers, and window motor controllers. IC Role / Device Role / Timing Role: Local 12 V regulator for distributed low-current loads in BCM subassemblies. Use Value: Eliminates need for dedicated LDOs per subsystem - reduces cost and improves board-level EMI immunity via integrated filtering. |
| Telematics Control Unit (TCU) Power Rail | Automotive Infotainment Display Backlight Bias |
Use Scenario: Generating auxiliary 12 V rail for GPS/GNSS receiver and cellular modem in TCU. IC Role / Device Role / Timing Role: Secondary regulated supply isolated from main system rail to prevent noise coupling. Use Value: 42 dB ripple rejection suppresses switching noise from DC/DC converters feeding primary 5 V/3.3 V rails. | Use Scenario: Biasing LED driver ICs for LCD backlight in instrument clusters and center displays. IC Role / Device Role / Timing Role: Stable voltage source for constant-current LED driver reference inputs. Use Value: ±2.5% output tolerance ensures consistent LED brightness across temperature and battery aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC78L12ABPG | Commercial grade (0°C to +125°C); no AEC-Q100 qualification | Not suitable for automotive under-hood or safety-critical modules | Select when cost sensitivity outweighs automotive qualification requirements |
| NCV78L12BDTRKG | SOIC-8 package; RJA ≈ 120°C/W (with 1-in² copper); same electrical specs | Better thermal performance in space-constrained PCB layouts with thermal pads | Choose for higher power density designs where TO-92 footprint is insufficient |
Compared with MC78L12ABPG and NCV78L12BDTRKG, the NCV78L12ABPG uniquely combines automotive qualification, TO-92 mechanical simplicity, and proven field reliability in harsh environments-making it optimal for legacy-compatible, cost-sensitive automotive modules requiring minimal redesign.
Availability
NCV78L12ABPG is available at Aetrix Electronics and suitable for automotive engine management, body electronics, and telematics applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for NCV78L12ABPG 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV78L12ABPG belongs to the NCV78LxxA automotive linear regulator family, designed specifically for robust, low-cost power conditioning in safety-critical vehicle subsystems operating across extreme temperature and voltage transients.
FAQ
What is the maximum input voltage rating for NCV78L12ABPG?
The NCV78L12ABPG supports up to 35 V DC input voltage for 12 V output variants, as specified in the Absolute Maximum Ratings table under "Input Voltage (12 V–18 V)" condition. This allows reliable operation during automotive load-dump events up to 35 V without damage or regulation loss.
Does NCV78L12ABPG require input and output capacitors for stability?
No, the NCV78L12ABPG is internally compensated and does not require external capacitors for stability. However, a 0.33 µF input capacitor is recommended if the device is located far from the bulk filter, and a 0.1 µF output capacitor improves transient response - both values are confirmed in the Standard Application diagram on page 2 of the datasheet.
Is NCV78L12ABPG pin-compatible with standard 78L12 regulators?
Yes, NCV78L12ABPG uses the same TO-92 pinout (Pin 1 = Output, Pin 2 = Ground, Pin 3 = Input) as industry-standard 78L12 devices including MC78L12ABPG and MC78L12ACPG. This enables drop-in replacement in existing designs without PCB changes.
What is the thermal resistance of NCV78L12ABPG in its TO-92 package?
The NCV78L12ABPG has a junction-to-ambient thermal resistance (RJA) of 200°C/W in the TO-92 package, as documented in the Thermal Characteristics table on page 2. This value assumes no heatsink and standard PCB mounting - power dissipation must be derated above 25°C ambient accordingly.
How does NCV78L12ABPG differ from MC78L12ABPG?
The NCV78L12ABPG differs from MC78L12ABPG primarily in qualification and temperature range: NCV78L12ABPG is AEC-Q100 Grade 1 qualified and rated for −40°C to +125°C operation, while MC78L12ABPG is commercial grade (0°C to +125°C) and lacks automotive change control and PPAP capability - both share identical electrical specs and pinout.
NCV78L12ABPG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body
- Packaging:
- Bag
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 6.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 42dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
NCV78L12ABPG FAQ
1.How can I place an order for NCV78L12ABPG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV78L12ABPG 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 NCV78L12ABPG reliable?
The price and inventory of NCV78L12ABPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV78L12ABPG is usually 5 days.
3.What payment methods are accepted for NCV78L12ABPG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV78L12ABPG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV78L12ABPG?
NCV78L12ABPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV78L12ABPG 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 NCV78L12ABPG?
For technical support, including NCV78L12ABPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV78L12ABPG requirements.
6.How does Aetrix verify that NCV78L12ABPG is sourced from the original manufacturer or authorized distributors?
All NCV78L12ABPG 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 NCV78L12ABPG meets industry standards.
7.What is the process for return or replacement of NCV78L12ABPG?
All NCV78L12ABPG units undergo pre-shipment inspection (PSI). If there is an issue with NCV78L12ABPG, 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 NCV78L12ABPG part is unused and in its original packaging.
Return procedure for NCV78L12ABPG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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