My Inquiry
My Account
onsemi NCP1117DT20RK
- Part No.:
- NCP1117DT20RK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
NCP1117DT20RK.pdf
- Description:
- IC REG LINEAR 2V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,965
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP1117DT20RK from onsemi is a 2.0 V fixed-output, low-dropout linear voltage regulator in DPAK package, delivering ≥1.0 A output current with 1.2 V max dropout at 800 mA over temperature, ±1.0% output voltage accuracy, and no minimum load requirement - used for point-of-load regulation in industrial controllers and battery chargers.
For engineers reviewing the NCP1117DT20RK datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, thermal performance in DPAK with PCB copper heatsinking, line/load regulation stability under transient conditions, and compatibility with 10 µF ceramic input/output capacitors.
Technical Context
The NCP1117DT20RK employs an internal bandgap reference trimmed to ±1.0%, driving a PNP pass transistor with safe operating area (SOA) compensation and thermal shutdown activation at ~175°C. Its feedback loop is internally compensated for stability with ≥4.7 µF output capacitance and ESR between 33 mΩ and 2.2 Ω.
It operates across 3.4 V to 12 V input range for 2.0 V output, supports infinite short-circuit duration due to thermal limiting, and integrates protection against overcurrent, SOA violation, and junction overheating - all without requiring external components for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.000 V (±1.0% tolerance; no minimum load required) |
| Max Dropout Voltage | 1.20 V at 800 mA (enables regulation down to Vin = 3.2 V) |
| Output Current | ≥1000 mA continuous (internally current-limited; derated above 12 V input) |
| Input Voltage Range | 3.4 V to 12 V (for 2.0 V output; absolute max 20 V) |
| Thermal Shutdown | Activates at ~175°C junction temperature; auto-recovery on cooling |
| Ripple Rejection | 66 dB at 120 Hz (Vin−Vout = 6.4 V, Iout = 500 mA) |
| Quiescent Current | 4.5 mA (at Vin = 12 V; enables low-noise, high-efficiency standby operation) |
Pinout & Package
DPAK package (Case 369C), surface-mount, with exposed metal tab thermally and electrically connected to Pin 2 (Output). Requires minimum PCB copper area for thermal management per Figure 22.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground / Adjust | Reference node for internal error amplifier; connects to system ground (no external resistor needed for fixed-output version) |
| 2 | Output | Regulated 2.0 V supply rail; heatsink tab is electrically tied to this pin |
| 3 | Input | Unregulated DC input (3.4–12 V); requires local 10 µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | Enables use in 3.3 V or 5 V systems powering 2.0 V logic rails with minimal headroom loss |
| ±1.0% output accuracy | Reduces need for post-regulation trimming in precision analog or ADC reference supplies |
| No minimum load requirement | Eliminates dummy load resistors in low-power sleep modes (e.g., battery-backed microcontrollers) |
| Integrated thermal shutdown | Prevents catastrophic failure during sustained overload or inadequate heatsinking |
| Pb-free DPAK package | Complies with RoHS; exposed tab enhances thermal dissipation using PCB copper as heatsink |
Applications
| Industrial Motor Controllers | Battery Charger Management |
|---|---|
Use Scenario: Powering gate drivers and MCU cores in 24 V DC motor drives where input ripple and thermal cycling are common. IC Role / Device Role / Timing Role: Primary 2.0 V LDO supplying real-time control logic and analog front-end circuitry. Use Value: Stable 2.0 V rail maintains timing integrity of PWM generators and ADC sampling clocks despite input transients. | Use Scenario: Regulating charging voltage reference in multi-cell Li-ion charger modules with variable input from buck converters. IC Role / Device Role / Timing Role: Fixed-output voltage reference source for charge controller ICs requiring precise 2.0 V bias. Use Value: ±1.0% accuracy ensures consistent constant-voltage termination thresholds across production units. |
| Hard Disk Drive Controllers | Consumer Set-Top Box SoC Supplies |
Use Scenario: Providing clean 2.0 V power to SATA interface PHYs and servo control ASICs in embedded storage systems. IC Role / Device Role / Timing Role: Point-of-regulation LDO decoupling high-speed serial link circuitry from noisy 3.3 V/5 V rails. Use Value: 66 dB ripple rejection suppresses switching noise from upstream DC/DC converters, reducing bit error rates. | Use Scenario: Supplying auxiliary 2.0 V domain for HDMI CEC controllers and IR receivers in low-cost media players. IC Role / Device Role / Timing Role: Low-quiescent-current (4.5 mA) regulator enabling always-on wake-up functionality. Use Value: Minimal idle current extends standby battery life while maintaining fast wake response via dedicated 2.0 V rail. |
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 |
|---|---|---|---|
| TLV1117-20CDCYR | 2.0 V output, SOT-223 package, 800 mA rated, 1.2 V dropout at 800 mA, ±2% accuracy | Lower output current rating and wider voltage tolerance; less suitable for 1 A continuous loads | Select when board space constraints favor SOT-223 and thermal budget allows lower current capability |
| LD1117S20TR | 2.0 V output, SOT-223 package, 800 mA rated, 1.1 V dropout at 800 mA, ±2% accuracy, no AEC-Q100 variant | Lacks automotive qualification and thermal shutdown robustness; limited ripple rejection (60 dB) | Acceptable for cost-sensitive consumer designs where 800 mA peak suffices and automotive compliance is not required |
Compared with TLV1117-20CDCYR and LD1117S20TR, the NCP1117DT20RK delivers higher output current (1.0 A vs. 800 mA), tighter output accuracy (±1.0% vs. ±2%), and integrated thermal shutdown - making it preferred for industrial and automotive-adjacent applications demanding reliability under sustained load and thermal stress.
Availability
NCP1117DT20RK is available at Aetrix Electronics and suitable for industrial motor controllers, battery charger management systems, and hard disk drive controllers requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP1117DT20RK 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 NCP1117 series belongs to onsemi's precision linear regulator product line, designed specifically for high-current, low-dropout point-of-load regulation in noise-sensitive and thermally constrained environments.
FAQ
What is the maximum input voltage for the NCP1117DT20RK?
The NCP1117DT20RK supports a maximum input voltage of 20 V absolute rating, but for reliable 2.0 V output operation, the recommended input range is 3.4 V to 12 V. Exceeding 12 V input while delivering ≥1.0 A output risks triggering thermal shutdown due to excessive power dissipation - design must ensure adequate PCB copper heatsinking per Figure 22.
Does the NCP1117DT20RK require an external capacitor on the adjust pin?
No, the NCP1117DT20RK is a fixed-output variant and does not use the adjust pin as a functional terminal - Pin 1 is internally connected to ground. Therefore, no external capacitor or resistor network is needed on Pin 1. The device only requires standard 10 µF ceramic input and output capacitors for stability and transient response.
Can the NCP1117DT20RK be used in automotive applications?
The NCP1117DT20RK itself is not AEC-Q100 qualified; however, its automotive-grade counterpart NCV1117DT20RKG is fully qualified and PPAP-capable. For non-safety-critical automotive subsystems (e.g., infotainment power rails), NCP1117DT20RK may be used with appropriate derating and thermal validation - but NCV1117DT20RKG is required for ASIL-compliant designs.
What is the thermal resistance (RJA) of the NCP1117DT20RK in typical PCB layout?
For the NCP1117DT20RK in DPAK package (Case 369C), RJA is 67 °C/W with minimum-size pad, and improves to ~30 °C/W with 1-inch square 2 oz. copper pad (per Figure 22). Actual RJA depends heavily on PCB copper area, layer count, and airflow - thermal design must validate junction temperature stays below 150°C under worst-case load and ambient conditions.
Is the NCP1117DT20RK pin-compatible with older three-terminal regulators like the LM317?
While the NCP1117DT20RK shares the same 3-pin DPAK footprint and pinout (Pin 1 = GND, Pin 2 = VOUT, Pin 3 = VIN) as LM317-based designs, it is not functionally pin-compatible because the LM317 is adjustable and requires external resistors. The NCP1117DT20RK is a fixed 2.0 V device - direct replacement requires verifying that the target application needs exactly 2.0 V and no adjustment capability.
NCP1117DT20RK 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):
- 2V
- 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:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
NCP1117DT20RK FAQ
1.How can I place an order for NCP1117DT20RK through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1117DT20RK 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 NCP1117DT20RK reliable?
The price and inventory of NCP1117DT20RK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1117DT20RK is usually 5 days.
3.What payment methods are accepted for NCP1117DT20RK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1117DT20RK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1117DT20RK?
NCP1117DT20RK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1117DT20RK 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 NCP1117DT20RK?
For technical support, including NCP1117DT20RK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1117DT20RK requirements.
6.How does Aetrix verify that NCP1117DT20RK is sourced from the original manufacturer or authorized distributors?
All NCP1117DT20RK 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 NCP1117DT20RK meets industry standards.
7.What is the process for return or replacement of NCP1117DT20RK?
All NCP1117DT20RK units undergo pre-shipment inspection (PSI). If there is an issue with NCP1117DT20RK, 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 NCP1117DT20RK part is unused and in its original packaging.
Return procedure for NCP1117DT20RK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP1117DT20RK Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
