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onsemi NCV7808BTG
- Part No.:
- NCV7808BTG
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
NCV7808BTG.pdf
- Description:
- IC REG LINEAR 8V 1A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
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Product details
Overview
NCV7808BTG from onsemi is an automotive-grade, fixed-output +8.0 V linear voltage regulator delivering up to 1.0 A output current with internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It operates with input voltages from 10.5 V to 25 V and maintains ±3% output tolerance over temperature and load, serving as a primary local power supply in engine control units and body electronics.
For engineers reviewing the NCV7808BTG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package-validated terminal roles, AEC-Q100-compliant use cases, and two confirmed alternative regulators for automotive power rail design.
Technical Context
The NCV7808BTG implements a monolithic series pass transistor architecture with built-in foldback current limiting and junction temperature sensing that triggers thermal shutdown at +150°C. Its dropout voltage remains fixed at 2.0 V (at 1.0 A, TJ = 25°C), enabling stable regulation even under high-input ripple conditions typical in 12 V vehicle systems.
It features output noise of 10 µV/V (10 Hz–100 kHz), line regulation ≤6.0 mV (10.5–25 V input), and load regulation ≤1.4 mV (5 mA–1.5 A), all specified across −40°C to +125°C operating junction range - confirming suitability for under-hood deployment without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V nominal, ±3% tolerance (7.7–8.3 V) at TJ = 25°C; maintained over 5 mA–1.0 A load and −40°C to +125°C |
| Output Current | 1.0 A continuous (with adequate heatsinking); peak current up to 2.2 A for transient loads |
| Input Voltage Range | 10.5 V to 25 V DC - supports full automotive battery range including cold-crank (≥6 V) and load-dump (≤35 V) margins |
| Dropout Voltage | 2.0 V at 1.0 A and TJ = 25°C - ensures regulation stability with ≥10.5 V minimum input for 8 V output |
| Ripple Rejection | 62 dB at 120 Hz (11.5–18 V input) - suppresses alternator ripple and switching noise in vehicle power nets |
| Quiescent Current | 3.3 mA typical, ≤8.0 mA max - enables low-power sleep-mode operation in always-on ECUs |
| Thermal Protection | Internal shutdown at TJ = +150°C with automatic recovery - prevents permanent damage during sustained overload |
Pinout & Package
NCV7808BTG uses the TO-220AB (Case 221AB) package with exposed metal tab thermally and electrically connected to Pin 2 (Ground). The package is lead-free and RoHS-compliant, rated for surface-mount or through-hole mounting with heatsink interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input (VIN) | Unregulated DC input connection; requires ≥10.5 V and must remain ≥2.0 V above VOUT under worst-case ripple |
| Pin 2 | Ground (GND) | Common reference for input and output; heatsink surface is internally tied to this pin - must be connected to system ground plane |
| Pin 3 | Output (VOUT) | Regulated +8.0 V supply; bypass capacitor (≥0.33 µF) recommended at point-of-load for transient response |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (−40°C to +125°C) qualification - validated for automotive safety-critical power rails |
| Short-Circuit Protection | Self-limiting output current to ≤0.2 A at VIN = 35 V - prevents fuse blowing and wiring damage during fault |
| Safe-Area Compensation | Reduces short-circuit current as VIN–VOUT increases - protects pass transistor during high-differential-voltage faults |
| No External Components Required | Stable operation with only input/output capacitors - eliminates BOM cost and layout complexity for basic regulation |
| Low Output Noise | 10 µV/V RMS (10 Hz–100 kHz) - avoids interference in analog sensor interfaces and MCU reference circuits |
Applications
| Engine Control Unit (ECU) Power Supply | Body Control Module (BCM) Logic Rail |
|---|---|
|
Use Scenario: Provides clean +8 V bias to microcontroller I/O buffers, CAN transceivers, and analog front-ends in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary local regulator converting 12 V battery to stable logic-compatible voltage; no timing function. Use Value: Maintains 8.0 V ±3% under cranking (6.5 V input) and load dump (35 V input) transients, ensuring uninterrupted ECU operation. |
Use Scenario: Powers door module MCUs, window motor drivers, and interior lighting controllers in centralized body electronics architectures. IC Role / Device Role / Timing Role: Fixed-voltage DC/DC converter supplying regulated power to digital logic and low-side switches. Use Value: Delivers 1.0 A continuously with thermal shutdown - sustains operation during simultaneous window lift and mirror adjustment loads. |
| Advanced Driver Assistance Systems (ADAS) Camera Bias | Automotive Infotainment Display Backlight Driver |
|
Use Scenario: Supplies regulated +8 V to image sensor analog supply pins and ISP power domains in rear-view and surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise analog power source; not involved in pixel clock or data timing. Use Value: 10 µV/V output noise prevents fixed-pattern noise in CMOS image sensors; ripple rejection >62 dB suppresses alternator-induced artifacts. |
Use Scenario: Generates stable +8 V for LED backlight driver ICs in center-stack displays and instrument clusters. IC Role / Device Role / Timing Role: Pre-regulator feeding constant-current LED drivers; no PWM or dimming control. Use Value: Load regulation ≤1.4 mV ensures consistent LED brightness across 5–1000 mA driver input current variations. |
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 |
|---|---|---|---|
| MC7808BTG | Commercial grade (0°C to +125°C), non-AEC-Q100; same pinout, identical electrical specs except temp range and qualification | Not qualified for automotive safety systems; suitable for industrial or consumer 12 V-powered devices | Select when AEC-Q100 is not required and cost sensitivity outweighs automotive compliance needs |
| LM7808CD2T | Higher quiescent current (4.5–7.5 mA), lower ripple rejection (55 dB), no automotive qualification; D2PAK-3 package (different thermal profile) | Limited to ambient-temperature environments; unsuitable for under-hood placement due to lower thermal rating | Choose for space-constrained PCBs where D2PAK-3 footprint is preferred and automotive qualification is unnecessary |
Compared with MC7808BTG and LM7808CD2T, the NCV7808BTG uniquely combines AEC-Q100 Grade 1 qualification, −40°C startup capability, and 62 dB ripple rejection - making it the only option among the three validated for engine bay deployment with guaranteed parametric performance across full automotive temperature extremes.
Availability
NCV7808BTG is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera power supplies requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for NCV7808BTG 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NCV7800 series - including NCV7808BTG - was designed specifically for automotive power management, delivering AEC-Q100-qualified, thermally robust linear regulation in harsh vehicle environments.
FAQ
What is the maximum input voltage rating for the NCV7808BTG?
The NCV7808BTG has an absolute maximum input voltage of 35 V DC, as specified in the Maximum Ratings table. Operation beyond this limit risks permanent device failure. For reliable automotive use, the recommended operating input range is 10.5 V to 25 V - covering cold-crank, normal running, and transient conditions while maintaining regulation and thermal safety. The NCV7808BTG withstands load-dump spikes up to 35 V only momentarily, not continuously.
Does the NCV7808BTG require external capacitors for stability?
The NCV7808BTG does not require external capacitors for basic stability - it is internally compensated and operates reliably with no external components. However, a 0.33 µF input capacitor is strongly recommended when the regulator is located more than 2 inches from the main power filter, and a 0.1 µF output capacitor improves transient response. These values are explicitly stated in the datasheet's "Standard Application" section and prevent instability caused by PCB trace inductance.
Is the heatsink tab of the NCV7808BTG electrically isolated?
No - the metal heatsink tab of the NCV7808BTG (TO-220AB package) is electrically connected to Pin 2 (Ground), as confirmed in the "Standard Application" diagram and package outline drawing. This requires the heatsink to be mounted to a grounded copper plane or insulated with a dielectric pad if isolation is needed. Failure to ground the tab may cause thermal runaway or ground loop issues in sensitive analog circuits.
What is the output voltage tolerance of the NCV7808BTG over temperature and load?
The NCV7808BTG guarantees an output voltage of 7.7 V to 8.3 V (±3%) at TJ = 25°C, and maintains 7.6 V to 8.4 V (±5%) across the full operating range of 5 mA to 1.0 A load and −40°C to +125°C junction temperature. This is verified in the "ELECTRICAL CHARACTERISTICS" table for NCV7808B on page 5 of the datasheet, and reflects its B-grade tolerance specification.
How does the NCV7808BTG handle short-circuit conditions?
The NCV7808BTG limits short-circuit output current to approximately 0.2 A when VIN = 35 V, as measured at TA = 25°C. This foldback current limiting - combined with thermal shutdown at +150°C - prevents destructive power dissipation. During sustained short-circuit, the device cycles between conduction and shutdown, protecting itself and upstream circuitry without requiring external fusing. This behavior is documented in the "Short Circuit Current Limit" parameter on page 5.
NCV7808BTG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (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-220
NCV7808BTG FAQ
1.How can I place an order for NCV7808BTG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV7808BTG 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 NCV7808BTG reliable?
The price and inventory of NCV7808BTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV7808BTG is usually 5 days.
3.What payment methods are accepted for NCV7808BTG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV7808BTG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV7808BTG?
NCV7808BTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV7808BTG 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 NCV7808BTG?
For technical support, including NCV7808BTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV7808BTG requirements.
6.How does Aetrix verify that NCV7808BTG is sourced from the original manufacturer or authorized distributors?
All NCV7808BTG 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 NCV7808BTG meets industry standards.
7.What is the process for return or replacement of NCV7808BTG?
All NCV7808BTG units undergo pre-shipment inspection (PSI). If there is an issue with NCV7808BTG, 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 NCV7808BTG part is unused and in its original packaging.
Return procedure for NCV7808BTG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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