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onsemi NCP1117DT20G
- Part No.:
- NCP1117DT20G
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
NCP1117DT20G.pdf
- Description:
- IC REG LINEAR 2V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:882
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Product details
Overview
NCP1117DT20G from onsemi is a 2.0 V fixed-output, low-dropout linear voltage regulator in DPAK package, delivering up to 1.0 A output current with 1.2 V max dropout at 800 mA, ±1.0% output voltage accuracy, and integrated thermal shutdown, current limiting, and safe operating area protection - used for point-of-load regulation in hard drive controllers and switching power supply post-regulation.
For engineers reviewing the NCP1117DT20G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, thermal performance in DPAK layout, no-minimum-load operation, and compatibility with 10 µF ceramic output capacitance for stability.
Technical Context
The NCP1117DT20G employs an internal bandgap reference trimmed to ±1.0% and a PNP pass transistor architecture enabling low dropout. It operates across 3.4 V to 12 V input range while maintaining regulation at 2.0 V output without minimum load.
Protection circuitry includes foldback current limiting, thermal shutdown activation at ~175°C, and safe operating area compensation - all implemented on-die without external components. The device supports stable operation with 4.7 µF–10 µF output capacitors having ESR between 33 mΩ and 2.2 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±1.0% (no minimum load required) |
| Max Output Current | 1.0 A continuous (derated above 12 V input) |
| Dropout Voltage | 1.2 V max at 800 mA over temperature (enables 3.4 V min 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 (self-protecting during overload) |
| Ripple Rejection | 60 dB at 120 Hz (Vin−Vout = 3.0 V, Iout = 500 mA) |
| Quiescent Current | 4.5 mA typical (low bias current improves light-load efficiency) |
Pinout & Package
DPAK (TO-252) package with exposed metal tab thermally and electrically connected to Pin 2 (Output). Standard 3-pin surface-mount configuration optimized for PCB copper heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground | Reference node for output voltage regulation; connects to system ground plane |
| 2 | Output | Regulated 2.0 V supply rail; tab is internally bonded to this pin for thermal conduction |
| 3 | Input | Unregulated DC input (3.4–12 V); requires local 10 µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| ±1.0% output voltage accuracy | Reduces need for post-production calibration in precision 2.0 V logic rails |
| No minimum load requirement | Enables stable regulation down to zero load - critical for standby/low-power modes |
| 1.2 V dropout at 800 mA | Permits use with 3.3 V intermediate bus for 2.0 V core supply in space-constrained layouts |
| Integrated thermal shutdown | Prevents permanent damage during sustained overload or inadequate heatsinking |
| Stable with 4.7 µF ceramic output cap | Eliminates need for tantalum or electrolytic capacitors - improves reliability and lifetime |
Applications
| Hard Drive Controller Power | Switching PSU Post-Regulation |
|---|---|
Use Scenario: Supplies clean 2.0 V to SATA controller ICs and interface logic in enterprise HDDs. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout post-regulator for digital core voltage domain. Use Value: Maintains regulation under dynamic load transients (±100 mA steps) with <10 mV deviation, per Figure 18. | Use Scenario: Final-stage regulation after a 5 V or 12 V buck converter in industrial power modules. IC Role / Device Role / Timing Role: Low-ESR-stable LDO providing ripple-filtered 2.0 V for FPGA I/O banks. Use Value: 60 dB ripple rejection at 120 Hz enables >30 dB additional attenuation of switching noise. |
| Consumer Equipment Point-of-Regulation | Active SCSI Termination |
Use Scenario: Local 2.0 V supply for USB PHYs and audio codec interfaces in set-top boxes. IC Role / Device Role / Timing Role: Fixed-output LDO placed adjacent to load to minimize IR drop and noise coupling. Use Value: No minimum load allows seamless transition into deep-sleep states without auxiliary loading. | Use Scenario: Precision 2.85 V termination (note: NCP1117DT20G not used here; 2.0 V variant supports custom termination schemes requiring 2.0 V bias). IC Role / Device Role / Timing Role: Stable voltage source for active pull-up networks in legacy parallel SCSI subsystems. Use Value: ±1.0% tolerance ensures consistent bus signal integrity across temperature (−40°C to +125°C). |
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 |
|---|---|---|---|
| MIC2920A-2.0WT | 2.0 V fixed, 1.5 A rated, 350 mV dropout at 1.5 A; TO-263 package | Higher current capability and lower dropout, but larger footprint and higher quiescent current (10 mA) | Select when >1.0 A load or <1.0 V dropout is required; verify thermal design for TO-263 pad area |
| TLV1117-20CDCYR | 2.0 V fixed, 800 mA rated, 1.2 V dropout at 800 mA; SOT-223 package | Lower max current, same dropout, smaller SOT-223 footprint; no automotive qualification | Select when board space is constrained and 800 mA suffices; not suitable for automotive AEC-Q100 designs |
Compared with MIC2920A-2.0WT and TLV1117-20CDCYR, the NCP1117DT20G offers optimal balance of 1.0 A capability, DPAK thermal performance, and automotive-grade robustness (via NCV1117 variants), making it preferred for industrial and automotive-adjacent embedded systems where reliability and thermal margin are prioritized over minimal footprint.
Availability
NCP1117DT20G is available at Aetrix Electronics and suitable for hard drive controllers, switching power supply post-regulation, and consumer equipment point-of-regulation requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP1117DT20G 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, with leadership in power management, analog, and sensor technologies.
The NCP1117 series was designed for high-reliability, low-dropout point-of-load regulation in industrial, computing, and automotive applications - emphasizing thermal robustness, ±1.0% accuracy, and simplified system integration.
FAQ
What is the maximum input voltage for the NCP1117DT20G?
The NCP1117DT20G supports an absolute maximum input voltage of 20 V, but for reliable 2.0 V output regulation, the recommended input range is 3.4 V to 12 V. Operation above 12 V reduces maximum output current to ≤1.0 A and increases thermal stress - proper heatsinking per Figure 22 is essential.
Does the NCP1117DT20G require an output capacitor, and what type is recommended?
Yes, the NCP1117DT20G requires a minimum 4.7 µF output capacitor with ESR between 33 mΩ and 2.2 Ω for stability. A 10 µF ceramic capacitor is recommended and validated in the datasheet for optimal transient response and noise suppression - aluminum or tantalum types may be used if ESR limits are met.
Is a minimum load required for the NCP1117DT20G to maintain regulation?
No, the NCP1117DT20G is specified for stable regulation with zero load current - a key advantage over older LDOs. This eliminates the need for dummy loads in low-power or standby modes, simplifying design and improving system efficiency in battery-backed or always-on applications using NCP1117DT20G.
How does thermal shutdown work in the NCP1117DT20G?
The NCP1117DT20G features an internal thermal limiter that disables the output when junction temperature reaches ~175°C, then re-enables once cooled below ~150°C. This cycling prevents catastrophic failure but indicates insufficient heatsinking - users must design PCB copper area per Figure 22 to keep RJA low enough for intended power dissipation in the NCP1117DT20G.
Can the NCP1117DT20G be used in automotive applications?
The NCP1117DT20G itself is not AEC-Q100 qualified; however, the pin-compatible NCV1117DT20RKG variant is automotive-grade and PPAP-capable. For non-automotive industrial use, NCP1117DT20G meets extended temperature requirements (0°C to +125°C ambient), but automotive designs must specify the NCV prefix version to ensure compliance - both share identical electrical specs and DPAK footprint.
NCP1117DT20G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- 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
NCP1117DT20G FAQ
1.How can I place an order for NCP1117DT20G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1117DT20G 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 NCP1117DT20G reliable?
The price and inventory of NCP1117DT20G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1117DT20G is usually 5 days.
3.What payment methods are accepted for NCP1117DT20G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1117DT20G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1117DT20G?
NCP1117DT20G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1117DT20G 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 NCP1117DT20G?
For technical support, including NCP1117DT20G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1117DT20G requirements.
6.How does Aetrix verify that NCP1117DT20G is sourced from the original manufacturer or authorized distributors?
All NCP1117DT20G 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 NCP1117DT20G meets industry standards.
7.What is the process for return or replacement of NCP1117DT20G?
All NCP1117DT20G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1117DT20G, 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 NCP1117DT20G part is unused and in its original packaging.
Return procedure for NCP1117DT20G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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