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onsemi NCV1117ST15T3G
- Part No.:
- NCV1117ST15T3G
- Manufacturer:
- onsemi
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NCV1117ST15T3G.pdf
- Description:
- IC REG LINEAR 1.5V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,729
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Product details
Overview
NCV1117ST15T3G from onsemi is an automotive-grade, 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 ECUs and industrial controllers.
For engineers reviewing the NCV1117ST15T3G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 800 mA, load regulation (≤3.3 mV), ripple rejection (66 dB at 120 Hz), thermal performance in SOT-223, and AEC-Q100 qualification for automotive use.
Technical Context
The NCV1117ST15T3G implements a bandgap-referenced error amplifier with internal trimming to achieve ±1.0% output voltage accuracy across −40°C to +125°C ambient. Its dropout behavior is characterized by 1.07 V at 800 mA and 1.10 V at 800 mA over temperature, enabling stable operation with input as low as 2.9 V (Vin ≥ Vout + 1.4 V).
It features three-terminal architecture with no minimum load requirement for regulation, supports input voltages up to 20 V, and includes internal protection against overcurrent, thermal runaway, and safe operating area violations - all implemented without external components beyond input/output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5 V ±1.0% (±15 mV tolerance) - ensures precise rail generation for 1.5 V logic or analog circuitry |
| Max Dropout Voltage | 1.2 V at 800 mA over temperature - enables operation with Vin as low as 2.7 V while maintaining regulation |
| Output Current | ≥1000 mA continuous - sufficient for powering microcontrollers, sensors, or interface ICs in automotive modules |
| Line Regulation | 0.5 mV (typical) - minimizes output variation when input voltage shifts, e.g., during battery transients |
| Load Regulation | 3.3 mV (max) - maintains stable 1.5 V output across full 0–800 mA load range |
| Ripple Rejection | 66 dB at 120 Hz - suppresses low-frequency switching noise from upstream DC/DC converters |
| Quiescent Current | 3.6 mA (typ) - low standby power draw critical for always-on automotive subsystems |
| Operating Temp | −40°C to +125°C ambient - qualified for under-hood and engine control unit environments |
Pinout & Package
Package: SOT-223 (Case 318H), surface-mount, thermally enhanced with heatsink tab electrically connected to Pin 2 (Output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground / Adjust | Reference node for internal error amplifier; tied directly to system ground for fixed-output operation |
| 2 | Output | Main regulated 1.5 V supply rail; connected to heatsink tab for thermal dissipation |
| 3 | Input | Unregulated input (up to 20 V); requires local 10 µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Automotive-grade reliability with PPAP capability - suitable for safety-critical ECU power rails |
| No Minimum Load Required | Stable regulation down to 0 mA load - eliminates need for dummy loads in low-power sleep modes |
| Thermal Shutdown Protection | Activates at ~175°C junction temperature - prevents catastrophic failure during overload or poor heatsinking |
| Internal Current Limit | 1000–2200 mA (min–max) - provides short-circuit robustness without external foldback circuitry |
| Pb-Free & RoHS Compliant | SOT-223 package with lead-free terminations - meets global environmental compliance requirements |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 1.5 V CAN transceiver bias rails and microcontroller core supplies in engine bay-mounted ECUs. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout post-regulator converting 5 V or 12 V intermediate rail to stable 1.5 V. Use Value: Maintains regulation during cold-crank (down to 6 V battery) and load-dump (up to 20 V), with <3.3 mV load regulation ensuring signal integrity. | Use Scenario: Providing clean 1.5 V supply to precision ADC reference buffers and isolated digital I/O drivers in factory automation controllers. IC Role / Device Role / Timing Role: Fixed-output LDO delivering noise-immune power to analog front-end circuitry. Use Value: 66 dB ripple rejection suppresses switching noise from adjacent DC/DC converters, preserving 16-bit ADC accuracy. |
| Hard Disk Drive Controller Board | Battery Charger Management System |
Use Scenario: Supplying 1.5 V to servo motor driver ICs and flash memory interfaces on HDD controller PCBs. IC Role / Device Role / Timing Role: Point-of-load regulator placed near high-current digital loads to minimize IR drop and noise coupling. Use Value: 1.2 V max dropout enables efficient operation from 3.3 V intermediate bus, reducing heat generation vs. higher-dropout alternatives. | Use Scenario: Generating 1.5 V bias for fuel gauge ICs and battery protection MOSFET gate drivers in portable Li-ion chargers. IC Role / Device Role / Timing Role: Low-quiescent-current (3.6 mA typ) regulator supporting always-on battery monitoring circuits. Use Value: Enables >10-year shelf life in storage mode by minimizing parasitic drain while retaining fast wake-up response. |
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, −40°C to +125°C, SOIC-8 package | Higher thermal resistance (RJA ≈ 120°C/W vs. 160°C/W for SOT-223), lower current rating | Select when board space allows SOIC footprint and thermal budget permits lower power dissipation |
| TPS7A4701RGWR | Adjustable (1.4–20.5 V), 1 A, 310 mV dropout at 1 A, ultra-low noise (4.7 µVRMS), −40°C to +125°C, QFN-20 | Requires external resistors; superior PSRR (70 dB) and noise performance but higher cost and complexity | Select only when ultra-low noise or adjustable output is required - not a drop-in replacement |
Compared with TLV1117-15CDCYR, NCV1117ST15T3G offers higher current capability and automotive qualification; compared with TPS7A4701RGWR, it trades noise performance for simplicity, cost, and AEC-Q100 compliance in fixed-voltage applications.
Availability
NCV1117ST15T3G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and hard disk drive controller boards requiring stable component supply with AEC-Q100 traceability and long-term lifecycle support.
Supply support for NCV1117ST15T3G 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV1117 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for robust, low-noise, high-reliability power delivery in engine control, body electronics, and ADAS subsystems.
FAQ
What is the maximum input voltage rating for the NCV1117ST15T3G?
The NCV1117ST15T3G supports a maximum input voltage of 20 V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable 1.5 V output, the minimum recommended input is 2.9 V (Vout + 1.4 V headroom), with optimal performance between 3.5 V and 12 V per electrical characteristics testing conditions.
Does the NCV1117ST15T3G require an external capacitor on the output pin?
Yes, the NCV1117ST15T3G requires a minimum 4.7 µF output capacitor with ESR between 33 mΩ and 2.2 Ω for stability, as mandated in the Applications Information section. A 10 µF tantalum or ceramic capacitor is recommended and widely used in reference designs to ensure loop stability and transient response across −40°C to +125°C.
Is the NCV1117ST15T3G pin-compatible with the LM317?
No - the NCV1117ST15T3G is a fixed-output 1.5 V device in SOT-223 package with pinout Input–Output–Ground, whereas the LM317 is adjustable and uses Adjust–Output–Input pin order. However, the NCP1117 (industrial version) family is stated in the datasheet to be pin-compatible with LM317 derivatives only in adjustable configurations, not fixed-output variants like NCV1117ST15T3G.
What thermal derating applies to the NCV1117ST15T3G in SOT-223 package?
In SOT-223 (Case 318H), the NCV1117ST15T3G has a thermal resistance RJA of 160°C/W with minimum pad layout. At 50°C ambient, maximum power dissipation is calculated as (150°C − 50°C)/160°C/W = 0.625 W. With 1.5 V output and 800 mA load, power dissipation is (Vin − 1.5 V) × 0.8 A - so Vin must stay ≤ 2.28 V to avoid thermal shutdown, confirming need for adequate copper pour or heatsinking.
How does the NCV1117ST15T3G handle short-circuit conditions?
The NCV1117ST15T3G incorporates internal current limiting and thermal shutdown. Under short-circuit, output current is clamped to 1000–2200 mA (min–max), and junction temperature rises until thermal shutdown activates at ~175°C, cycling output on/off. This protects the device indefinitely but requires proper PCB copper area to sustain repeated fault events without permanent degradation.
NCV1117ST15T3G 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
NCV1117ST15T3G FAQ
1.How can I place an order for NCV1117ST15T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV1117ST15T3G 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 NCV1117ST15T3G reliable?
The price and inventory of NCV1117ST15T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV1117ST15T3G is usually 5 days.
3.What payment methods are accepted for NCV1117ST15T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV1117ST15T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV1117ST15T3G?
NCV1117ST15T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV1117ST15T3G 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 NCV1117ST15T3G?
For technical support, including NCV1117ST15T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV1117ST15T3G requirements.
6.How does Aetrix verify that NCV1117ST15T3G is sourced from the original manufacturer or authorized distributors?
All NCV1117ST15T3G 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 NCV1117ST15T3G meets industry standards.
7.What is the process for return or replacement of NCV1117ST15T3G?
All NCV1117ST15T3G units undergo pre-shipment inspection (PSI). If there is an issue with NCV1117ST15T3G, 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 NCV1117ST15T3G part is unused and in its original packaging.
Return procedure for NCV1117ST15T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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