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onsemi NCV317LBZRAG
- Part No.:
- NCV317LBZRAG
- Manufacturer:
- onsemi
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
NCV317LBZRAG.pdf
- Description:
- IC REG LINEAR POS ADJ 100MA TO92
- Quantity:
- Payment:
- Shipping:
Inventory:4,842
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Product details
Overview
NCV317LBZRAG from ON Semiconductor is a 3-terminal, adjustable positive-voltage linear regulator delivering ≥100 mA output current with 1.2 V to 37 V programmable output range, internal thermal overload protection, and short-circuit current limiting - used in automotive power supplies requiring AEC-Q100 qualification.
For engineers reviewing the NCV317LBZRAG 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, RLINE ≤ 0.07 %/V), thermal performance (TJ = −40°C to +125°C), and automotive-grade reliability data.
Technical Context
The NCV317LBZRAG implements a bandgap-referenced error amplifier driving a pass transistor with integrated safe-area compensation and current-limit foldback. Its floating operation enables high-side or adjustable-current configurations without ground-referenced constraints.
It operates across input-output differentials up to 40 V and maintains regulation down to 3.5 mA minimum load current. Thermal shutdown activates at junction temperatures exceeding +125°C, with guaranteed operation over −40°C to +125°C ambient per AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | ≥100 mA continuous - supports low-power microcontroller rails and sensor biasing without external boost. |
| Output Voltage Range | 1.2 V to 37 V - set by two external resistors; enables flexible system-level voltage derivation. |
| Reference Voltage (VREF) | 1.25 V ±0.05 V - defines regulation accuracy baseline; determines output tolerance via resistor ratio matching. |
| Line Regulation | ≤0.07 %/V - limits output drift under input supply variation; critical for battery-fed or unregulated DC inputs. |
| Load Regulation | ≤70 mV (VO ≤ 5 V) or ≤1.5 %/V (VO ≥ 5 V) - ensures stable output across full load range. |
| Junction Temp Range | −40°C to +125°C - qualified per AEC-Q100 Grade 1; validated for under-hood automotive environments. |
| Ripple Rejection | 65–80 dB (120 Hz) - suppresses rectified AC ripple; improves noise immunity in switched-input systems. |
Pinout & Package
NCV317LBZRAG uses the TO-92 package: molded plastic, 3-lead, straight lead form, 0.200″ lead spacing, JEDEC TO-92 compliant. Pin 1 = Adjust, Pin 2 = Output, Pin 3 = Input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj) | Reference node for feedback divider | Connects to voltage divider midpoint; sets output via VOUT = VREF(1 + R2/R1); draws 50–100 μA. |
| 2 (Output) | Regulated output terminal | Delivers stabilized voltage; requires ≥10 μF output capacitance for stability per datasheet. |
| 3 (Input) | Unregulated input supply connection | Accepts 2.5 V to 40 V differential above output; must include ≥0.33 μF input bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Internal thermal shutdown | Activates at TJ ≥ +125°C; prevents damage during sustained overload or poor heatsinking. |
| Short-circuit current limiting | Clamps output current to ~150 mA typical; protects device and upstream supply during fault conditions. |
| Floating operation capability | Enables high-side current source or negative-regulator configurations without ground reference constraints. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with operating temperature range −40°C to +125°C ambient. |
| Safe-area compensated pass transistor | Prevents second breakdown during transient overloads; eliminates need for external SOA protection. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Powering microcontrollers, CAN transceivers, and discrete logic in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V local regulator supplying digital subsystems from 12 V battery rail. Use Value: AEC-Q100 qualification ensures reliability across temperature cycling and vibration; built-in current limiting avoids fuse blowing during shorted loads. |
Use Scenario: Providing stable bias voltage for precision analog sensors (e.g., RTDs, strain gauges) in factory automation equipment. IC Role / Device Role / Timing Role: Low-noise, adjustable voltage source feeding instrumentation amplifiers and ADC references. Use Value: 0.003 %/V RMS noise and 65–80 dB ripple rejection minimize measurement error; 1.25 V reference enables accurate ratiometric scaling. |
| Point-of-Load (PoL) for Legacy MCU Systems | LED Driver Bias Supply |
Use Scenario: Generating 3.3 V or 5 V for legacy 8-bit MCUs in industrial HMIs where switching noise must be avoided. IC Role / Device Role / Timing Role: Linear post-regulator following bulk DC/DC conversion to eliminate EMI-sensitive switching artifacts. Use Value: No switching frequency or harmonics; output stability unaffected by PCB layout or nearby RF sources. |
Use Scenario: Setting constant current for indicator LEDs or backlight segments in automotive dashboards. IC Role / Device Role / Timing Role: Adjustable current source using external sense resistor between Adj and Output pins. Use Value: Enables precise LED brightness control over temperature and supply variation; inherent current limit protects LEDs during startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM317LZ | Non-automotive grade; rated for 0°C to +125°C (not −40°C), no AEC-Q100 qualification. | Limited to commercial/industrial use; unsuitable for automotive under-hood deployment. | Select LM317LZ only for cost-sensitive non-automotive designs where extended temperature and qualification are unnecessary. |
| TLV1117-33CDCYR | Fixed 3.3 V output; lower dropout (1.2 V), higher PSRR (75 dB), but not adjustable and max 800 mA. | Replaces fixed-voltage PoL needs; cannot replicate NCV317LBZRAG's 1.2–37 V adjustability or floating topology. | Choose TLV1117-33CDCYR when fixed 3.3 V output suffices and lower dropout is required; avoid when voltage flexibility or current-source mode is needed. |
Compared with LM317LZ and TLV1117-33CDCYR, the NCV317LBZRAG uniquely combines automotive qualification, wide output adjustability, and floating operation - making it irreplaceable in AEC-Q100-compliant variable-voltage or current-source designs.
Availability
NCV317LBZRAG is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and legacy MCU power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCV317LBZRAG 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 supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV317LBZRAG belongs to ON Semiconductor's automotive-qualified linear regulator product line, designed specifically for robust, low-noise, and thermally resilient power delivery in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input-output voltage differential supported by the NCV317LBZRAG?
The NCV317LBZRAG supports a maximum input-output voltage differential of 40 V. This rating allows operation from nominal 12 V or 24 V automotive batteries even under load-dump transients, provided the junction temperature remains within −40°C to +125°C. Exceeding 40 V risks permanent damage per absolute maximum ratings.
Does the NCV317LBZRAG require external capacitors, and if so, what values are recommended?
Yes, the NCV317LBZRAG requires an input bypass capacitor ≥0.33 μF and an output capacitor ≥10 μF (tantalum or aluminum electrolytic). These stabilize regulation and prevent oscillation. The NCV317LBZRAG datasheet specifies these values as mandatory for all operating conditions - omitting them may cause instability or excessive output ripple.
How does the NCV317LBZRAG implement thermal protection, and is it latch-off or auto-recovery?
The NCV317LBZRAG features internal thermal shutdown that activates at approximately +125°C junction temperature. It is auto-recovering: once the die cools below the hysteresis threshold (~15°C below trip point), regulation resumes without external reset. This behavior is confirmed in the thermal protection section of the ON Semiconductor NCV317LBZRAG datasheet.
Can the NCV317LBZRAG be used as a constant-current source, and how is it configured?
Yes, the NCV317LBZRAG can function as a constant-current source by connecting a sense resistor between the Adjust and Output pins. With the Input tied to the supply, output current equals VREF/RSENSE ≈ 1.25 V/RSENSE. This configuration is explicitly shown in Figure 4 of the NCV317LBZRAG datasheet and leverages its precise 1.25 V reference and low IADJ drift.
What is the adjustment pin current (IADJ) specification for the NCV317LBZRAG, and why does it matter in design?
The NCV317LBZRAG has an adjustment pin current (IADJ) of 50–100 μA, with a maximum change of 5 μA across operating conditions. This low, stable current minimizes error in resistor-divider-based output programming - enabling tight output tolerance when high-value feedback resistors are used without significant loading effects on the reference node.
NCV317LBZRAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
NCV317LBZRAG FAQ
1.How can I place an order for NCV317LBZRAG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV317LBZRAG 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 NCV317LBZRAG reliable?
The price and inventory of NCV317LBZRAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV317LBZRAG is usually 5 days.
3.What payment methods are accepted for NCV317LBZRAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV317LBZRAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV317LBZRAG?
NCV317LBZRAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV317LBZRAG 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 NCV317LBZRAG?
For technical support, including NCV317LBZRAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV317LBZRAG requirements.
6.How does Aetrix verify that NCV317LBZRAG is sourced from the original manufacturer or authorized distributors?
All NCV317LBZRAG 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 NCV317LBZRAG meets industry standards.
7.What is the process for return or replacement of NCV317LBZRAG?
All NCV317LBZRAG units undergo pre-shipment inspection (PSI). If there is an issue with NCV317LBZRAG, 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 NCV317LBZRAG part is unused and in its original packaging.
Return procedure for NCV317LBZRAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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