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onsemi NCP1117DT25T5
- Part No.:
- NCP1117DT25T5
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
NCP1117DT25T5.pdf
- Description:
- IC REG LINEAR 2.5V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,750
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Product details
Overview
NCP1117DT25T5 from onsemi is a 2.5 V fixed-output, low-dropout linear voltage regulator in DPAK (TO-252) 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 industrial controllers and hard drive power supplies.
For engineers reviewing the NCP1117DT25T5 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, thermal performance in DPAK layout, line/load regulation specs (≤3.3 mV/≤4.3 mV), ripple rejection (62 dB at 120 Hz), and compatibility with 10 µF ceramic output capacitance.
Technical Context
The NCP1117DT25T5 implements a bandgap-referenced series pass architecture with internal trimming for ±1.0% initial output accuracy and 0.5% temperature stability. Its dropout behavior is characterized across −40°C to +125°C ambient, maintaining regulation down to Vin = 3.9 V at 800 mA load.
Protection circuitry includes foldback current limiting activated above ~1.5 A, thermal shutdown triggered at ~175°C junction temperature, and safe operating area compensation to prevent secondary breakdown during transient overloads - all fully functional without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±1.0% (1.470–1.530 V min/max over temp & load) |
| Max Output Current | 1.0 A continuous (derated above 125°C ambient; limited to 1.0 A when Vin > 12 V) |
| Dropout Voltage | 1.20 V max at 800 mA (ensures regulation with Vin ≥ 3.7 V at full load) |
| Ripple Rejection | 62 dB at 120 Hz (reduces AC line ripple by >1,200× before output) |
| Line Regulation | 0.5 mV (typical change per volt input variation, 3.9–10 V input range) |
| Load Regulation | 4.3 mV (max deviation from 0–800 mA load step, supports stable digital rail) |
| Quiescent Current | 5.2 mA (low bias draw enables efficient operation in always-on subsystems) |
Pinout & Package
DPAK (TO-252-3) package with exposed metal tab thermally and electrically connected to Pin 2 (Output). Standard 3-pin configuration optimized for PCB copper heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground / Adjust | Reference node for internal error amplifier; connects directly to system ground plane for regulation stability |
| 2 | Output | Main regulated 2.5 V supply rail; tab connection enables high-current PCB trace routing and thermal conduction |
| 3 | Input | Unregulated DC input (up to 20 V); requires local 10 µF ceramic bypass capacitor within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Maintains regulation from 0 mA to 1.0 A - eliminates need for dummy load resistors in standby modes |
| Thermal shutdown with auto-recovery | Shuts off at ~175°C junction, restarts after cooldown - prevents catastrophic failure without system intervention |
| Stable with 10 µF ceramic output cap | Eliminates reliance on higher-ESR tantalum/aluminum caps; reduces BOM cost and footprint |
| 1.2 V dropout at 800 mA | Enables use with 3.3 V or 5 V intermediate rails (e.g., post-regulating buck converter outputs) |
| Pb-free, RoHS-compliant | Meets IPC-J-STD-609A Class 2 marking; compatible with lead-free reflow profiles (peak 260°C) |
Applications
| Industrial Motor Control I/O Power | Hard Disk Drive Logic Rail |
|---|---|
Use Scenario: Powers FPGA configuration logic and microcontroller peripherals in servo drive modules where input is derived from a 5 V switching supply. IC Role / Device Role / Timing Role: Point-of-load LDO providing clean, low-noise 2.5 V for digital core logic and ADC reference buffers. Use Value: 62 dB ripple rejection suppresses switching noise from upstream DC/DC, preventing bit errors in serial configuration interfaces. |
Use Scenario: Supplies 2.5 V to HDD preamplifier ICs and servo control ASICs in 2.5″ and 3.5″ drives. IC Role / Device Role / Timing Role: Primary linear regulator for analog front-end circuits requiring ultra-low output noise and fast transient response. Use Value: 4.3 mV load regulation ensures stable bias under rapid head-positioning current transients, avoiding read/write errors. |
| Consumer Set-Top Box SoC Core | Automotive Infotainment USB Hub |
Use Scenario: Regulates 2.5 V for video decoder SoC core logic in streaming media boxes powered from a shared 5 V rail. IC Role / Device Role / Timing Role: Fixed-output LDO decoupling high-speed digital logic from noisy system power bus. Use Value: 1.2 V dropout allows operation even as input sags to 3.7 V during peak CPU/GPU activity, preventing brownouts. |
Use Scenario: Provides 2.5 V to USB 2.0 PHY and hub controller in automotive infotainment head units with 12 V battery input. IC Role / Device Role / Timing Role: Secondary LDO in multi-rail power tree, downstream of primary 5 V DC/DC converter. Use Value: Thermal shutdown and SOA protection ensure reliability during cold-crank (6.5 V) and load-dump (27 V) transients when paired with proper input clamping. |
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 |
|---|---|---|---|
| TLV1117-25CDR | 2.5 V fixed, SOT-223 only; 800 mA max output; 1.2 V dropout at 800 mA; ±2% accuracy | Limited thermal capability vs. DPAK; lower max current; less accurate output voltage | Choose TLV1117-25CDR only if board space constraints prohibit DPAK and 800 mA suffices. |
| LD1086V25 | 2.5 V fixed, TO-220/DPAK; 1.5 A max; 1.5 V dropout at 1.2 A; ±2% accuracy; no AEC-Q100 option | Higher current but larger dropout; wider voltage tolerance; no automotive qualification path | Choose LD1086V25 only if >1.0 A is required and thermal margin permits higher dropout loss. |
Compared with TLV1117-25CDR and LD1086V25, the NCP1117DT25T5 delivers tighter output accuracy (±1.0% vs. ±2%), superior thermal performance in DPAK, and AEC-Q100-capable variants (NCV1117DT25RKG) for automotive designs - making it optimal for precision 2.5 V rails where stability and qualification matter.
Availability
NCP1117DT25T5 is available at Aetrix Electronics and suitable for industrial motor control I/O power, hard disk drive logic rails, and consumer set-top box SoC core applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP1117DT25T5 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, sensors, and connectivity solutions.
The NCP1117 series was designed specifically for high-reliability, low-dropout point-of-load regulation in industrial, computing, and automotive systems - emphasizing thermal robustness, tight voltage accuracy, and simplified design-in with minimal external components.
FAQ
What is the maximum input voltage rating for the NCP1117DT25T5?
The NCP1117DT25T5 supports a maximum input voltage of 20 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent damage. For reliable 2.5 V output, input must remain ≥3.9 V across the full 0–800 mA load range and temperature extremes.
Does the NCP1117DT25T5 require an external capacitor on the adjust pin?
No - the NCP1117DT25T5 is a fixed-output variant; it has no adjust pin. Only the adjustable versions (e.g., NCP1117DTAG) require Cadj. This part uses internal resistor networks, eliminating external programming components and simplifying layout.
Can the NCP1117DT25T5 be used in automotive applications?
The NCP1117DT25T5 itself is not AEC-Q100 qualified, but its automotive-grade counterpart NCV1117DT25RKG is. For automotive use, specify the NCV prefix version, which undergoes additional screening, extended temperature validation (−40°C to +125°C), and PPAP documentation support.
What is the thermal resistance (RJA) of the NCP1117DT25T5 in typical PCB layout?
In a standard 2-layer PCB with 2 oz. copper and a 100 mm² exposed pad connected to internal ground planes, RJA is approximately 67°C/W (per datasheet Case 369C). With optimized 4-layer layout and 500 mm² copper pour, RJA can improve to ≤40°C/W - enabling 1.0 A operation up to +85°C ambient.
Is the NCP1117DT25T5 pin-compatible with older LM317-based designs?
No - the NCP1117DT25T5 is not pin-compatible with the LM317. It follows the standard 3-pin LDO pinout (Input–Output–Ground), whereas the LM317 uses Adjust–Output–Input. However, the NCP1117 series *is* pin-compatible with other NCP1117 fixed-output variants in the same package, enabling drop-in replacement within the family.
NCP1117DT25T5 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 68dB (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
NCP1117DT25T5 FAQ
1.How can I place an order for NCP1117DT25T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1117DT25T5 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 NCP1117DT25T5 reliable?
The price and inventory of NCP1117DT25T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1117DT25T5 is usually 5 days.
3.What payment methods are accepted for NCP1117DT25T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1117DT25T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1117DT25T5?
NCP1117DT25T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1117DT25T5 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 NCP1117DT25T5?
For technical support, including NCP1117DT25T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1117DT25T5 requirements.
6.How does Aetrix verify that NCP1117DT25T5 is sourced from the original manufacturer or authorized distributors?
All NCP1117DT25T5 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 NCP1117DT25T5 meets industry standards.
7.What is the process for return or replacement of NCP1117DT25T5?
All NCP1117DT25T5 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1117DT25T5, 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 NCP1117DT25T5 part is unused and in its original packaging.
Return procedure for NCP1117DT25T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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