My Inquiry
My Account
onsemi NCV317LBDG
- Part No.:
- NCV317LBDG
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV317LBDG.pdf
- Description:
- IC REG LIN POS ADJ 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,646
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCV317LBDG from ON Semiconductor is a 3-terminal, adjustable positive-voltage linear regulator delivering up to 100 mA output current with 1.2 V to 37 V adjustable output range, internal thermal overload protection, and short-circuit current limiting-used in automotive power supplies requiring AEC-Q100 qualification.
For engineers reviewing the NCV317LBDG datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (TO-92), confirmed electrical parameters (VREF = 1.25 V, IADJ = 50–100 µA, line regulation ≤ 0.07 %/V), thermal performance (TJ = −40°C to +125°C), and automotive-grade reliability context.
Technical Context
The NCV317LBDG implements a bandgap-referenced error amplifier driving an NPN pass transistor, with integrated safe-area compensation and current-limit foldback. Its floating operation supports high-side or series-pass configurations in systems where input voltage exceeds ground-referenced control logic.
Designed for automotive environments, it features guaranteed operation across −40°C to +125°C junction temperature, meets AEC-Q100 Grade 1 stress testing, and includes internal thermal shutdown triggered at TJ ≥ 160°C with hysteresis for recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 100 mA max - sufficient for biasing sensors, microcontrollers, and analog circuitry without external boost |
| Reference Voltage | 1.25 V ±50 mV - sets precision of output adjustment via R1/R2 divider; enables stable 3.3 V, 5 V, or custom rails |
| Line Regulation | ≤ 0.07 %/V - maintains output stability despite automotive battery fluctuations (9 V–16 V nominal, up to 40 V transients) |
| Load Regulation | ≤ 70 mV (VO ≤ 5 V) - ensures consistent voltage under dynamic load steps typical in ECU subsystems |
| Junction Temp Range | −40°C to +125°C - validated for under-hood placement per AEC-Q100 Grade 1 requirements |
| Ripple Rejection | 65 dB (no CADJ), 80 dB (with 10 µF CADJ) - suppresses alternator ripple and switching noise in mixed-signal domains |
| Adjust Pin Current | 50–100 µA - enables high-resistance feedback networks minimizing quiescent current in always-on modules |
Pinout & Package
NCV317LBDG is housed in a 3-lead TO-92 plastic package with straight leads (JEDEC TO-92 variant), rated for 625 mW power dissipation at TA = 25°C and designed for through-hole mounting on automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Adjust (Adj) | Reference node for feedback network | Connects to voltage divider midpoint; 50–100 µA bias current flows here-must be isolated from noisy nodes |
| 2 - Output (Out) | Regulated output terminal | Delivers stabilized voltage; requires local 1 µF ceramic bypass capacitor for stability and transient response |
| 3 - Input (In) | Unregulated input supply connection | Accepts 2.5 V to 40 V differential; must include ≥10 µF bulk capacitance to handle load dump transients |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified - validated for use in engine control, body electronics, and ADAS power domains |
| Thermal shutdown with hysteresis | Triggers at TJ ≥ 160°C and resets ~15°C below - prevents latch-up during sustained overload or poor heatsinking |
| Safe operating area (SOA) compensation | Internal circuitry limits power dissipation vs. VIN–VOUT - eliminates need for external SOA protection in most automotive loads |
| Low adjustment pin current | 50–100 µA - allows >100 kΩ feedback resistors, reducing divider power loss in battery-backed modules |
| Floating operation capability | Supports high-side configuration - enables use as current source or negative regulator when referenced to non-ground potential |
Applications
| Engine Control Unit (ECU) Sensor Bias | Body Control Module (BCM) Microcontroller Supply |
|---|---|
Use Scenario: Providing stable 3.3 V or 5 V to oxygen sensors, knock sensors, and MAP sensors in engine compartments exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Primary linear regulator supplying precision analog front-end circuitry and ADC reference paths. Use Value: Maintains <±1% output accuracy over −40°C to +125°C while rejecting alternator ripple and load-dump transients up to 40 V. | Use Scenario: Powering low-power MCUs (e.g., S12Z, RH850) and CAN transceivers in door modules, lighting controllers, and seat control units. IC Role / Device Role / Timing Role: Local point-of-load regulator converting 12 V battery rail to MCU core and I/O voltages. Use Value: Delivers 100 mA with <70 mV load regulation and 65 dB ripple rejection-ensuring clean supply for CAN bus timing and flash programming. |
| Infotainment System USB Port Charger | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Regulating 5 V for rear-seat USB charging ports in head units, where input varies from 9 V (engine off) to 16 V (engine running) with load dumps. IC Role / Device Role / Timing Role: Adjustable linear regulator configured as fixed 5 V output with external resistor divider. Use Value: Internal short-circuit and thermal protection prevent failure during cable shorts or connector hot-plug events. | Use Scenario: Supplying 3.3 V to CMOS image sensors and ISP processors in forward-facing cameras mounted behind windshield. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator placed near sensor module to minimize trace inductance and EMI coupling. Use Value: 0.003% RMS output noise and 80 dB ripple rejection with CADJ ensure clean power for pixel-level analog signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable positive linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM317LZ | Non-automotive grade; rated for 0°C to +125°C only; no AEC-Q100 qualification; same TO-92 package and pinout | Intended for commercial/industrial use; not validated for automotive vibration, temperature cycling, or HTOL stress | Select LM317LZ only for cost-sensitive non-automotive designs where AEC-Q100 compliance is unnecessary |
| TLV1117LV33 | Fixed 3.3 V output; 800 mA output current; SOT-223 package; lower dropout (600 mV); no adjustable option | Used where fixed low-voltage rail and higher current are required; incompatible for adjustable-output or TO-92 footprint designs | Choose TLV1117LV33 only when fixed 3.3 V and >100 mA are needed-and board layout allows SOT-223 replacement |
Compared with LM317LZ and TLV1117LV33, the NCV317LBDG uniquely combines automotive qualification, adjustable output, TO-92 compatibility, and proven thermal robustness for under-hood deployment-making it irreplaceable in AEC-Q100-compliant adjustable-regulator roles.
Availability
NCV317LBDG is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and infotainment system power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV317LBDG 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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV317LBDG belongs to ON Semiconductor's automotive-qualified linear regulator product line, engineered specifically for reliable, low-noise DC-DC conversion in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input-to-output voltage differential supported by the NCV317LBDG?
The NCV317LBDG supports a maximum input-output voltage differential (VIN − VOUT) of 40 V. This rating enables operation across full automotive battery transients-including load dump events-while maintaining regulation. The device must be operated within its power dissipation limit (PD ≤ 625 mW at TA = 25°C), so higher differentials require derating based on ambient temperature and heatsinking. This specification is confirmed in the Absolute Maximum Ratings table of the official NCV317LBDG datasheet.
Does the NCV317LBDG require an output capacitor for stability?
Yes, the NCV317LBDG requires a minimum 1 µF ceramic capacitor at the output pin for stability and transient response. The datasheet specifies that a 1 µF X7R or better dielectric is recommended, placed as close as possible to the output and ground pins. Omitting this capacitor may cause oscillation or poor load-step recovery. This requirement applies regardless of whether the device is used in fixed or adjustable configurations-and is distinct from the optional 10 µF capacitor on the adjust pin used to improve ripple rejection. The NCV317LBDG's internal compensation relies on this external output capacitance.
Is the NCV317LBDG pin-compatible with standard LM317L variants?
Yes, the NCV317LBDG is pin-compatible with LM317LZ and LM317LZX in the TO-92 package: Pin 1 is Adjust, Pin 2 is Output, and Pin 3 is Input. However, it is not pin-compatible with SOIC-packaged variants (e.g., LM317LM) due to differing pin counts and layouts. While mechanical and electrical pinout matches the TO-92 family, users must verify PCB footprint tolerances-NCV317LBDG uses the standard TO-92 straight-lead form factor defined in JEDEC TO-92. No PCB changes are required when replacing LM317LZ with NCV317LBDG in existing automotive designs.
What is the typical adjustment pin current (IADJ) for the NCV317LBDG, and why does it matter?
The typical adjustment pin current (IADJ) for the NCV317LBDG is 75 µA, with a guaranteed range of 50–100 µA across temperature and process. This low, stable current enables high-value feedback resistors (e.g., 2.4 kΩ + 3.9 kΩ for 5 V), minimizing power loss in always-on circuits like vehicle security modules. Because IADJ flows through the lower resistor (R1), accurate output voltage calculation must include its contribution: VOUT = 1.25 V × (1 + R2/R1) + IADJ × R2. Ignoring IADJ introduces error-especially with R2 > 10 kΩ-so the NCV317LBDG's tightly specified IADJ improves design predictability.
How does the NCV317LBDG handle short-circuit conditions?
The NCV317LBDG incorporates internal short-circuit current limiting with foldback characteristics: output current is limited to approximately 50–100 mA under short-circuit, decreasing further as input-output differential increases. Combined with thermal shutdown (triggering at ~160°C junction temperature), this protects the device during sustained faults such as solder bridges or wiring errors. Unlike basic current limiting, the foldback reduces power dissipation during shorts-preventing thermal runaway. This behavior is inherent to the IC's architecture and requires no external components. The NCV317LBDG will automatically recover once fault and temperature normalize, making it suitable for unattended automotive subsystems.
NCV317LBDG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 37V
- Voltage Dropout (Max):
- -
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCV317LBDG FAQ
1.How can I place an order for NCV317LBDG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV317LBDG 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 NCV317LBDG reliable?
The price and inventory of NCV317LBDG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV317LBDG is usually 5 days.
3.What payment methods are accepted for NCV317LBDG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV317LBDG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV317LBDG?
NCV317LBDG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV317LBDG 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 NCV317LBDG?
For technical support, including NCV317LBDG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV317LBDG requirements.
6.How does Aetrix verify that NCV317LBDG is sourced from the original manufacturer or authorized distributors?
All NCV317LBDG 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 NCV317LBDG meets industry standards.
7.What is the process for return or replacement of NCV317LBDG?
All NCV317LBDG units undergo pre-shipment inspection (PSI). If there is an issue with NCV317LBDG, 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 NCV317LBDG part is unused and in its original packaging.
Return procedure for NCV317LBDG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCV317LBDG Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
