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onsemi NCV317BD2TG
- Part No.:
- NCV317BD2TG
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
NCV317BD2TG.pdf
- Description:
- IC REG LIN POS ADJ 1.5A D2PAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
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Product details
Overview
NCV317BD2TG from onsemi is an automotive-grade adjustable positive voltage regulator delivering up to 1.5 A across 1.2 V to 37 V output range, featuring internal thermal shutdown, current limiting, and safe-area compensation. It operates in floating configuration for high-voltage applications and requires only two external resistors for output programming - used in engine control units, body electronics, and ADAS power supplies.
For engineers reviewing the NCV317BD2TG datasheet, pinout, applications, or equivalent options, key selection considerations include its −55°C to +150°C operating junction temperature, D2PAK−3 package with heatsink-connected pin 2, 1.25 V reference voltage tolerance (±0.05 V), and AEC−Q100 qualification for automotive systems requiring robust overtemperature and short-circuit resilience.
Technical Context
The NCV317BD2TG implements a floating 3-terminal linear regulator architecture with a precision 1.25 V bandgap reference between output and adjust terminals. Its feedback loop uses constant-current programming via R1–R2 divider, where IAdj is tightly controlled below 100 µA to minimize error contribution.
Thermal protection triggers at 180°C junction temperature, and safe-area compensation dynamically adjusts biasing under high power dissipation to prevent second breakdown. The device supports both local regulation and precision current regulation modes by grounding R2 or connecting it to load return.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5 A maximum - sufficient to power microcontrollers, sensors, and analog front-ends in automotive ECUs without external pass transistors. |
| Output Voltage Range | 1.2 V to 37 V - programmable via resistor divider; enables single-part support for multiple rail voltages (e.g., 3.3 V, 5 V, 12 V) in vehicle subsystems. |
| Reference Voltage | 1.25 V (typ), ±0.05 V (min/max) - defines regulation accuracy baseline; directly impacts output tolerance when using standard 1% resistors. |
| Line Regulation | 0.01–0.04 %/V - ensures stable output despite battery voltage fluctuations (9 V–16 V nominal, up to 36 V during load dump). |
| Load Regulation | 5 mV (VO ≤ 5 V) or 0.5 % VO (VO ≥ 5 V) - maintains tight voltage control across full load range, critical for ADC reference stability. |
| Junction Temp Range | −55°C to +150°C - meets AEC−Q100 Grade 0 requirements for under-hood and transmission-control applications. |
| Ripple Rejection | 66 dB (no CAdj), 80 dB (with 10 µF CAdj) at 120 Hz - suppresses alternator ripple and switching noise in mixed-signal automotive modules. |
Pinout & Package
D2PAK−3 (Case 936) surface-mount package with exposed heatsink tab electrically connected to Pin 2 (VOUT). Requires minimum 5.08 mm × 5.08 mm copper pad for thermal performance; heatsink surface must be soldered to PCB ground plane or dedicated thermal layer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Adjust | Reference node input | Connects to voltage divider midpoint; senses 1.25 V reference; low IAdj (≤100 µA) minimizes divider current error. |
| 2 - VOUT | Regulated output terminal | Primary power delivery node; also connects to heatsink tab - must be routed with low-impedance trace and adequate copper area for thermal management. |
| 3 - VIN | Unregulated input supply | Accepts 2.5 V to 40 V differential; requires 0.1 µF ceramic input bypass capacitor placed within 5 mm of pin for EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC−Q100 Grade 0 qualified and PPAP capable - validated for production use in safety-critical vehicle systems. |
| Thermal shutdown | 180°C trip point with hysteresis - prevents permanent damage during sustained overload or poor heatsinking in confined enclosures. |
| Safe-area compensation | Integrated circuit-level protection against secondary breakdown - enables reliable operation at high VIN–VOUT differentials (up to 40 V) without external SOA limiting. |
| Adjust pin current control | IAdj ≤ 100 µA, ΔIAdj ≤ 5 µA over full operating range - allows use of high-value resistors (e.g., 240 Ω / 1.65 kΩ) without significant output error. |
| Floating operation | No ground reference required - supports high-side regulation, battery monitoring circuits, and negative-input configurations (e.g., reverse-battery protection interfaces). |
Applications
| Engine Control Unit (ECU) Power Supply | ADAS Camera Module Bias |
|---|---|
Use Scenario: Regulates 5 V and 3.3 V rails from 12 V battery in gasoline/diesel engine control units, surviving load dump transients up to 36 V. IC Role / Device Role / Timing Role: Primary linear regulator providing clean, low-noise power to MCU, CAN transceivers, and sensor signal conditioners. Use Value: Internal thermal shutdown and safe-area compensation eliminate need for external foldback circuitry, reducing BOM count and board space. | Use Scenario: Supplies stable 3.3 V to image sensor and ISP in forward-facing camera modules mounted near windshield. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring <10 mV output deviation across −40°C to +105°C ambient, critical for pixel uniformity. Use Value: 1.25 V reference stability (0.7 % over temperature) and 66 dB ripple rejection maintain SNR in analog video path under alternator noise. |
| Body Control Module (BCM) Lighting Driver | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Powers LED driver ICs and LIN transceivers in door modules and interior lighting controllers exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Adjustable regulator configured as constant-current source (via fixed R2) for PWM-dimmable LED strings. Use Value: Floating architecture enables direct sensing of LED cathode voltage, improving current accuracy independent of ground bounce in high-current switching loads. | Use Scenario: Provides isolated 5 V supply to torque and position sensors in EPS motor control assemblies located near high-current inverters. IC Role / Device Role / Timing Role: Noise-suppressed local regulator decoupling sensitive analog sensor outputs from inverter EMI. Use Value: 80 dB ripple rejection with 10 µF CAdj reduces 120 Hz alternator ripple to <50 µV RMS, preventing offset drift in Hall-effect sensor bridges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable positive voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM317BD2TG | Same pinout and electrical specs, but −40°C to +125°C rating (not AEC−Q100 qualified); no PPAP support. | Suitable for industrial or commercial systems without automotive qualification mandates. | Select LM317BD2TG only if AEC−Q100 compliance and extended temperature validation are not required. |
| TLV1117-33CDR | Fixed 3.3 V output, 800 mA max, SOT-223 package; lower dropout (1.2 V), no adjust pin. | Limited to single-rail applications; lacks programmability and current capability for multi-voltage designs. | Choose TLV1117-33CDR only when fixed 3.3 V output and compact footprint outweigh need for adjustability and 1.5 A drive. |
Compared with LM317BD2TG, the NCV317BD2TG adds automotive qualification and extended temperature margin at identical cost and layout; versus TLV1117-33CDR, it trades fixed-output simplicity for full programmability and higher current, enabling fewer SKUs across diverse vehicle subsystems.
Availability
NCV317BD2TG is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for NCV317BD2TG 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 electronics for automotive, industrial, cloud, and consumer markets.
The NCV317BD2TG belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for harsh-environment power management in safety-critical vehicle systems where reliability, thermal resilience, and qualification compliance are mandatory.
FAQ
What is the maximum input-to-output voltage differential supported by the NCV317BD2TG?
NCV317BD2TG supports a maximum input-to-output voltage differential of 40 V DC. This rating allows operation with automotive battery inputs up to 36 V (including load dump) while regulating down to 1.2 V output. Exceeding 40 V differential risks permanent damage, as specified in the Absolute Maximum Ratings table of the official datasheet.
Does the NCV317BD2TG require an input bypass capacitor, and what value is recommended?
Yes, the NCV317BD2TG requires a 0.1 µF ceramic input bypass capacitor (CIN) placed within 5 mm of the VIN and GND pins. This capacitor reduces sensitivity to input line impedance and suppresses high-frequency noise from upstream sources like switching regulators or alternators - a requirement confirmed in Figure 1 and Applications Information section of the NCV317BD2TG datasheet.
How does the heatsink tab connection work on the NCV317BD2TG D2PAK−3 package?
On the NCV317BD2TG in D2PAK−3 (Case 936) package, the exposed heatsink surface is electrically connected to Pin 2 (VOUT). This means the thermal pad must be soldered to a PCB copper area tied to the regulated output net - not to system ground - to avoid shorting or violating safe operating area. Mechanical mounting to chassis ground is acceptable only if galvanically isolated.
Can the NCV317BD2TG be used as a precision current regulator, and how is it configured?
Yes, the NCV317BD2TG can be configured as a precision current regulator by connecting a fixed resistor between the Adjust and Output pins. With IAdj held below 100 µA and VREF = 1.25 V, output current equals 1.25 V / RSET. For example, a 1.25 Ω resistor delivers 1.0 A ±5% - a method explicitly detailed in Figure 26 and Applications Information section of the NCV317BD2TG datasheet.
Is the NCV317BD2TG pin-compatible with the standard LM317 in D2PAK−3 package?
Yes, the NCV317BD2TG is pin-compatible with LM317BD2TG and LM317D2TG in the D2PAK−3 package - same pin 1 (Adjust), pin 2 (VOUT), pin 3 (VIN) arrangement and mechanical outline. However, NCV317BD2TG adds automotive qualification, extended temperature range (−55°C to +150°C), and tighter long-term stability (0.3%/1kHrs), making it a drop-in replacement where AEC−Q100 compliance is required.
NCV317BD2TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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:
- 1.5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB ~ 65dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
NCV317BD2TG FAQ
1.How can I place an order for NCV317BD2TG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV317BD2TG 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 NCV317BD2TG reliable?
The price and inventory of NCV317BD2TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV317BD2TG is usually 5 days.
3.What payment methods are accepted for NCV317BD2TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV317BD2TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV317BD2TG?
NCV317BD2TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV317BD2TG 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 NCV317BD2TG?
For technical support, including NCV317BD2TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV317BD2TG requirements.
6.How does Aetrix verify that NCV317BD2TG is sourced from the original manufacturer or authorized distributors?
All NCV317BD2TG 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 NCV317BD2TG meets industry standards.
7.What is the process for return or replacement of NCV317BD2TG?
All NCV317BD2TG units undergo pre-shipment inspection (PSI). If there is an issue with NCV317BD2TG, 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 NCV317BD2TG part is unused and in its original packaging.
Return procedure for NCV317BD2TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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