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onsemi NCV1117ST15T3
- Part No.:
- NCV1117ST15T3
- Manufacturer:
- onsemi
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NCV1117ST15T3.pdf
- Description:
- IC REG LINEAR 1.5V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
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Product details
Overview
NCV1117ST15T3 from onsemi is a 1.5 V fixed-output, low-dropout linear voltage regulator in SOT-223 package, delivering ≥1.0 A output current with 1.2 V max dropout at 800 mA over temperature, ±1.0% output voltage accuracy, and integrated thermal shutdown, current limiting, and safe operating area protection - used for point-of-load regulation in automotive infotainment power rails.
For engineers reviewing the NCV1117ST15T3 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 800 mA, thermal performance with PCB copper heatsinking, load regulation under 0–800 mA, and AEC-Q100 qualification for automotive ambient operation from −40°C to +125°C.
Technical Context
The NCV1117ST15T3 implements a bandgap-referenced series pass architecture with internal trimming for ±1.0% initial output accuracy and 0.5% temperature stability. It operates across 2.9 V to 11.5 V input range while maintaining regulation without minimum load requirement.
Its protection circuitry includes foldback current limiting, thermal shutdown activation at ~175°C, and safe operating area compensation - enabling robust operation in automotive subsystems where input transients and ambient extremes are common.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5 V fixed, ±1.0% accuracy at 25°C ensures stable core logic supply for microcontrollers and sensors. |
| Max Dropout Voltage | 1.2 V at 800 mA over temperature enables operation with only 2.7 V input - critical for battery-backed 3.3 V rail post-regulation. |
| Output Current | ≥1.0 A continuous output supports high-current peripherals like CAN transceivers or display drivers without external boost. |
| Input Voltage Range | 2.9 V to 11.5 V allows direct use from automotive 5 V or 12 V supplies with sufficient headroom for ripple and dropouts. |
| Thermal Shutdown | Activates at ~175°C junction temperature - prevents catastrophic failure during sustained overload or poor heatsinking. |
| Load Regulation | ≤3.0 mV change from 0 to 800 mA ensures stable voltage under dynamic load switching in real-time control systems. |
| Ripple Rejection | 66 dB at 120 Hz (Vin−Vout = 6.4 V) suppresses switching noise from upstream DC/DC converters in mixed-signal designs. |
Pinout & Package
SOT-223 package (Case 318H) with exposed metal tab thermally connected to Pin 2 (Output); requires minimum 10 mm² copper pad for RJA ≤ 160°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground / Adjust | Reference node for internal error amplifier; tied directly to system ground plane to minimize noise coupling and ensure regulation accuracy. |
| 2 | Output | Main regulated 1.5 V output; heatsink tab is electrically connected here - must be isolated from other nets unless intentionally grounded via thermal pad. |
| 3 | Input | Unregulated input supply; requires local 10 µF ceramic bypass capacitor placed within 5 mm of pin to maintain stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Enables regulation down to zero load - eliminates need for dummy resistors in low-power sleep modes. |
| AEC-Q100 qualified | Validated for automotive applications including engine control modules and ADAS camera power supplies. |
| Pb-free SOT-223 package | Complies with RoHS and ELV directives; compatible with standard reflow profiles (J-STD-020, peak 260°C). |
| Internal current limit & SOA compensation | Prevents thermal runaway during short-circuit events without requiring external foldback circuitry. |
| 20 V absolute max input rating | Withstands load dump transients up to 18 V typical - simplifies front-end protection design in 12 V vehicle systems. |
Applications
| Automotive Infotainment Core Supply | Industrial PLC I/O Module Regulator |
|---|---|
Use Scenario: Powers ARM Cortex-M7 MCU cores and DDR memory interfaces in head unit mainboards. IC Role / Device Role / Timing Role: Primary 1.5 V LDO supplying CPU core voltage with tight tolerance and low noise. Use Value: ±1.0% accuracy and 66 dB ripple rejection prevent timing violations and data corruption during burst memory access. | Use Scenario: Provides clean 1.5 V bias for analog sensor signal conditioning circuits in modular I/O cards. IC Role / Device Role / Timing Role: Point-of-regulation LDO decoupling noisy 5 V backplane supply before precision ADC reference buffers. Use Value: 3.0 mV load regulation ensures <0.2% gain error drift across 0–800 mA sensor channel count scaling. |
| Hard Drive Controller Power | Battery Charger Management IC Bias |
Use Scenario: Supplies 1.5 V to SATA controller ASICs in automotive DVR storage subsystems. IC Role / Device Role / Timing Role: Fixed-output LDO replacing older LM317-based designs with improved dropout and thermal margin. Use Value: 1.2 V dropout at 800 mA allows operation from degraded 3.3 V rail during cold-cranking conditions (down to 2.7 V). | Use Scenario: Generates 1.5 V bias for fuel gauge ICs and charging state machines in 12 V lead-acid battery chargers. IC Role / Device Role / Timing Role: Low-quiescent, high-accuracy LDO powering battery management logic independent of charger topology. Use Value: 4.2 mA quiescent current minimizes standby drain; AEC-Q100 qualification ensures reliability across temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117-15CDCYR | 1.5 V fixed, 800 mA max output, 1.2 V dropout at 800 mA, but rated only to +125°C ambient (not automotive-grade). | Lacks AEC-Q100 qualification and −40°C low-temp validation - unsuitable for under-hood or infotainment chassis mounting. | Select only for industrial or consumer applications where extended temperature and automotive qualification are not required. |
| LD1117S15TR | 1.5 V fixed, 800 mA output, 1.1 V dropout at 800 mA, but no thermal shutdown or SOA compensation. | Missing internal thermal protection increases risk of latch-up during sustained overload in sealed enclosures. | Use only in thermally managed environments with external current limiting and temperature monitoring. |
Compared with TLV1117-15CDCYR and LD1117S15TR, the NCV1117ST15T3 provides guaranteed −40°C to +125°C operation, integrated thermal shutdown, and AEC-Q100 compliance - making it the sole choice for automotive power domains requiring functional safety alignment.
Availability
NCV1117ST15T3 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, hard drive controllers, and battery charger management requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCV1117ST15T3 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics for automotive, industrial, cloud, and IoT applications.
The NCV1117 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for robust, low-noise point-of-load regulation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input voltage for the NCV1117ST15T3?
The NCV1117ST15T3 has an absolute maximum input voltage rating of 20 V per the datasheet. However, for reliable operation with full 1.0 A output capability, the recommended maximum input is 11.5 V - exceeding this reduces safe operating area margin and may trigger thermal shutdown under sustained load.
Does the NCV1117ST15T3 require an output capacitor, and what value is recommended?
Yes, the NCV1117ST15T3 requires a minimum 4.7 µF output capacitor with ESR between 33 mΩ and 2.2 Ω for stability. A 10 µF ceramic or tantalum capacitor is recommended and widely used in production designs to ensure loop stability and improve transient response.
Is the NCV1117ST15T3 pin-compatible with the LM317?
No - the NCV1117ST15T3 is not pin-compatible with the LM317. While the NCP1117 series (industrial grade) is pin-compatible with LM317 in adjustable configuration, the NCV1117ST15T3 is a fixed 1.5 V device in SOT-223 package with Pin 1 = Ground, Pin 2 = Output, Pin 3 = Input - differing from LM317's ADJ/VOUT/IN pinout.
What is the quiescent current of the NCV1117ST15T3 at 11.5 V input?
The quiescent current of the NCV1117ST15T3 is 3.6 mA typical at Vin = 11.5 V and TA = 25°C. This low IQ supports efficient operation in always-on automotive modules where standby power budget is constrained.
Can the NCV1117ST15T3 be used without a heatsink in a 2-layer PCB?
Yes - the NCV1117ST15T3 can operate without an external heatsink when mounted on a 2-layer PCB with ≥100 mm² of 2 oz. copper connected to Pin 2 (output/heatsink tab). At 500 mA load and 25°C ambient, junction temperature remains below 100°C with this layout per Figure 21 in the datasheet.
NCV1117ST15T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 72dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
NCV1117ST15T3 FAQ
1.How can I place an order for NCV1117ST15T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV1117ST15T3 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 NCV1117ST15T3 reliable?
The price and inventory of NCV1117ST15T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV1117ST15T3 is usually 5 days.
3.What payment methods are accepted for NCV1117ST15T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV1117ST15T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV1117ST15T3?
NCV1117ST15T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV1117ST15T3 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 NCV1117ST15T3?
For technical support, including NCV1117ST15T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV1117ST15T3 requirements.
6.How does Aetrix verify that NCV1117ST15T3 is sourced from the original manufacturer or authorized distributors?
All NCV1117ST15T3 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 NCV1117ST15T3 meets industry standards.
7.What is the process for return or replacement of NCV1117ST15T3?
All NCV1117ST15T3 units undergo pre-shipment inspection (PSI). If there is an issue with NCV1117ST15T3, 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 NCV1117ST15T3 part is unused and in its original packaging.
Return procedure for NCV1117ST15T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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