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onsemi NCV1117DT18RK
- Part No.:
- NCV1117DT18RK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
NCV1117DT18RK.pdf
- Description:
- IC REG LINEAR 1.8V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,858
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Product details
Overview
NCV1117DT18RK from onsemi is an automotive-grade, low-dropout linear voltage regulator delivering a fixed 1.8 V output at up to 1.0 A, 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. It is used in automotive infotainment power rails and industrial microcontroller core supplies.
For engineers reviewing the NCV1117DT18RK datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, thermal performance in DPAK package, AEC-Q100 qualification status, and compatibility with 20 V max input for post-regulation in automotive systems.
Technical Context
The NCV1117DT18RK implements a monolithic PNP pass transistor architecture with internal bandgap reference and error amplifier, enabling stable regulation without minimum load requirement. Its feedback loop is internally compensated for stability with ≥4.7 µF output capacitance.
It operates across −40°C to +125°C ambient temperature, supports input voltages up to 20 V, and features a heatsink tab electrically connected to Pin 2 (Output) to enhance thermal dissipation in the DPAK package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.0% (ensures reliable core voltage for 1.8 V logic and MCU I/O) |
| Max Output Current | 1.0 A continuous (supports high-current digital loads like SoC cores or FPGAs) |
| Dropout Voltage | 1.2 V max at 800 mA over temperature (enables operation with ≤3.0 V input headroom) |
| Input Voltage Range | 2.9 V to 11.8 V (compatible with 3.3 V/5 V intermediate rails and automotive battery transients) |
| Quiescent Current | 4.2 mA typical at Vin = 11.8 V (low no-load consumption for always-on subsystems) |
| Ripple Rejection | 72 dB at 120 Hz (effective suppression of switching converter ripple in post-regulation) |
| Thermal Shutdown | Activates at ~175°C junction (prevents catastrophic failure under overload or poor heatsinking) |
Pinout & Package
DPAK (TO-252-3) package with exposed metal tab thermally and electrically connected to Pin 2 (Output). Designed for surface-mount assembly with PCB copper pour acting as heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground / Adjust | Reference node for internal error amplifier; must be connected directly to system ground plane for regulation accuracy |
| 2 | Output | Regulated 1.8 V supply output; also connected to heatsink tab for thermal conduction and electrical grounding of heat path |
| 3 | Input | Unregulated input (2.9–11.8 V); requires local 10 µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified for automotive applications per Grade 1 (−40°C to +125°C), supporting PPAP documentation |
| No minimum load required | Stable regulation down to 0 mA output current-ideal for standby and low-power sleep modes |
| Internal protection | Integrated current limit, SOA compensation, and thermal shutdown eliminate need for external protection circuitry |
| Pb-free and RoHS compliant | Meets automotive environmental compliance requirements and enables lead-free reflow assembly |
| Low dropout at full load | 1.2 V dropout at 800 mA ensures usable output even with marginal input headroom in battery-powered systems |
Applications
| Automotive Infotainment Core Supply | Industrial PLC Microcontroller Rail |
|---|---|
Use Scenario: Powering the 1.8 V core voltage of a TI Jacinto or NXP S32K MCU in an automotive head unit. IC Role / Device Role / Timing Role: Primary LDO regulator providing clean, low-noise, AEC-Q100-compliant core voltage. Use Value: Enables reliable operation under cold-crank (≤6 V battery) and load-dump (≤36 V transient) conditions due to 20 V max input rating and robust internal protection. | Use Scenario: Supplying 1.8 V to ARM Cortex-M7-based controller in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Fixed-output linear regulator delivering stable core voltage independent of load variation. Use Value: Eliminates need for external load resistors or sequencing circuitry thanks to zero-minimum-load requirement and fast transient response. |
| Hard Disk Drive Controller Power | Battery Charger Reference Regulator |
Use Scenario: Providing regulated 1.8 V to SATA controller ASIC in enterprise storage enclosures. IC Role / Device Role / Timing Role: Post-regulator cleaning switching converter output for noise-sensitive interface logic. Use Value: 72 dB ripple rejection at 120 Hz suppresses switching artifacts, reducing bit-error rates in high-speed serial links. | Use Scenario: Generating precise 1.8 V reference for ADC and DAC in multi-cell lithium-ion charger ICs. IC Role / Device Role / Timing Role: Low-drift, high-accuracy voltage source for analog measurement subsystems. Use Value: ±1.0% initial accuracy and 0.5% temperature stability ensure consistent charge termination thresholds across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73318PDBVR | Lower IQ (45 µA), lower max current (300 mA), SOT-23 package, no AEC-Q100 | Not suitable for automotive or >300 mA loads; better for ultra-low-power portable devices | Select only for space-constrained, non-automotive, sub-300 mA applications where quiescent current dominates design priority |
| TPS7A0518PDQNR | Ultra-low IQ (25 µA), 200 mA max, X2SON package, no AEC-Q100, higher dropout (270 mV @ 100 mA) | Targeted at always-on IoT sensors-not for automotive or high-current use | Choose only when <100 mA load and nanoscale footprint are mandatory; not a functional replacement for NCV1117DT18RK |
Compared with TLV73318PDBVR and TPS7A0518PDQNR, the NCV1117DT18RK delivers 3.3× higher output current, automotive qualification, and proven thermal robustness in DPAK-making it the sole viable option for 1.8 V/1 A automotive core rails requiring long-term reliability.
Availability
NCV1117DT18RK is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, hard drive controllers, and battery charger reference designs requiring stable component supply with full AEC-Q100 traceability and long-lifecycle support.
Supply support for NCV1117DT18RK 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, medical, and IoT applications.
The NCV1117 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for safety-critical and high-reliability power management in vehicles and industrial control systems.
FAQ
What is the maximum input voltage rating for the NCV1117DT18RK?
The NCV1117DT18RK supports a maximum input voltage of 20 V, as specified in the Absolute Maximum Ratings table. This allows it to handle automotive battery transients including load dump events when properly clamped, and makes it suitable for use after buck converters with up to 18 V nominal input rails. Operation above 20 V risks permanent damage.
Does the NCV1117DT18RK require an external output capacitor, and what type is recommended?
Yes, the NCV1117DT18RK requires a minimum 4.7 µF output capacitor with ESR between 33 mΩ and 2.2 Ω for stability. Ceramic (X7R/X5R), tantalum, or aluminum electrolytic capacitors meeting these specs are acceptable. A 10 µF ceramic capacitor is commonly used and provides optimal transient response and noise reduction for the NCV1117DT18RK.
Is the NCV1117DT18RK pin-compatible with older LM317-based designs?
No-the NCV1117DT18RK is a fixed-output 3-pin device (Input, Output, Ground), while the LM317 is adjustable and requires two external resistors. However, the NCP1117/NCV1117 family-including the NCV1117DT18RK-is pin-compatible with the LM317 *only* in adjustable configurations (e.g., NCV1117DTARKG), not in fixed-output variants like the NCV1117DT18RK.
What is the thermal resistance (RJA) of the NCV1117DT18RK in its DPAK package?
In the DPAK (Case 369C) package, the NCV1117DT18RK has a typical junction-to-ambient thermal resistance (RJA) of 67°C/W with minimum-size PCB copper pad, and 6.0°C/W junction-to-case (RJC). Actual RJA improves significantly with larger copper pours-e.g., ~30°C/W with 2-inch² 2 oz. copper-and must be validated per layout in thermal simulation or testing for the NCV1117DT18RK.
How does the NCV1117DT18RK handle short-circuit conditions?
The NCV1117DT18RK incorporates internal current limiting and thermal shutdown. Under sustained short-circuit, it limits output current to ~1.5 A (typical), then activates thermal shutdown at ~175°C junction temperature. The device cycles on/off until fault clears-this protects against destruction but requires proper heatsinking to avoid premature shutdown during brief overload events involving the NCV1117DT18RK.
NCV1117DT18RK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (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:
- DPAK
NCV1117DT18RK FAQ
1.How can I place an order for NCV1117DT18RK through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV1117DT18RK 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 NCV1117DT18RK reliable?
The price and inventory of NCV1117DT18RK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV1117DT18RK is usually 5 days.
3.What payment methods are accepted for NCV1117DT18RK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV1117DT18RK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV1117DT18RK?
NCV1117DT18RK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV1117DT18RK 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 NCV1117DT18RK?
For technical support, including NCV1117DT18RK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV1117DT18RK requirements.
6.How does Aetrix verify that NCV1117DT18RK is sourced from the original manufacturer or authorized distributors?
All NCV1117DT18RK 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 NCV1117DT18RK meets industry standards.
7.What is the process for return or replacement of NCV1117DT18RK?
All NCV1117DT18RK units undergo pre-shipment inspection (PSI). If there is an issue with NCV1117DT18RK, 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 NCV1117DT18RK part is unused and in its original packaging.
Return procedure for NCV1117DT18RK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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