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NXP Semiconductors NX1117C285Z,115
- Part No.:
- NX1117C285Z,115
- Manufacturer:
- NXP Semiconductors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NX1117C285Z,115.pdf
- Description:
- IC REG LINEAR 2.85V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:4,207
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Product details
Overview
NX1117C285Z,115 from NXP Semiconductors is a fixed-output 2.85 V, ±1 % accuracy, 1 A low-dropout linear voltage regulator in SOT223 package. It features SOA control, thermal shutdown, and output current limiting, and operates across −40 °C to 125 °C ambient temperature. It is used as a post-regulator for DC-DC converters in USB devices and hard drive controllers.
For engineers reviewing the NX1117C285Z,115 datasheet, NX1117C285Z,115 pinout, NX1117C285Z,115 application, or NX1117C285Z,115 equivalent, key selection criteria include dropout voltage at 800 mA (≤1.2 V), line/load regulation (≤4.5 mV), PSRR (63 dB), quiescent current (5–6 mA), and thermal resistance (72 K/W on standard FR4 PCB).
Technical Context
The NX1117C285Z,115 implements internal Safe Operating Area (SOA) control to dynamically limit output current under high Vin−Vout conditions, preventing thermal runaway. Its reference voltage (1.25 V) is trimmed for ±1 % output accuracy over temperature and load.
It requires no minimum load for regulation and supports input voltages up to 20 V with a guaranteed dropout voltage of ≤1.2 V at 800 mA output. The device uses a single-stage pass transistor architecture with integrated thermal shutdown triggered at 135 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 2.85 V ±1 % (guaranteed over −40 °C to 125 °C, 0–800 mA load) |
| Max output current | 1 A (internally limited; SOA-controlled current foldback above safe power dissipation) |
| Dropout voltage | ≤1.2 V at 800 mA (enables regulation from 4.05 V input; critical for battery-powered systems) |
| Input voltage range | 4.25 V to 10 V (valid operating range per datasheet; absolute max 20 V) |
| Quiescent current | 5–6 mA (low static consumption enables efficient operation in always-on subsystems) |
| PSRR | 63 dB at 120 Hz (suppresses ripple from upstream switching converters) |
| Thermal resistance | 72 K/W (junction-to-ambient, FR4 PCB with standard footprint; determines heatsinking needs) |
Pinout & Package
The NX1117C285Z,115 is housed in a plastic SOT223 (SC-73) surface-mount package with an exposed thermal pad on lead 4. This medium-power package supports 1 A continuous output with board-level thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and thermal path; must be connected to large copper pour for heat dissipation |
| 2 | VOUT | Regulated 2.85 V output; connects to load and output capacitor (≥680 nF) |
| 3 | VIN | Unregulated input (4.25–10 V); requires ≥680 nF input capacitor close to pin |
| 4 | VOUT | Second output connection; electrically tied to pin 2; serves as primary thermal conduction path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Enables stable regulation down to 0 mA output-ideal for standby or intermittent-load applications |
| SOA control | Prevents destructive power dissipation by reducing current during high Vin−Vout conditions |
| Thermal shutdown | Activates at 135 °C junction temperature and auto-recovers after cooldown-ensures robustness |
| ±1 % output accuracy | Reduces need for external trimming or feedback calibration in precision 2.85 V rail generation |
| −40 °C to 125 °C operation | Validated for automotive under-hood and industrial control environments without derating |
Applications
| USB Power Delivery Interface | Hard Drive Controller LDO |
|---|---|
Use Scenario: Provides clean 2.85 V supply to USB PHY transceivers and interface logic in host/device ports. IC Role / Device Role / Timing Role: Post-regulator cleaning ripple from buck converter output; maintains tight voltage tolerance for signal integrity. Use Value: 63 dB PSRR suppresses 120 Hz switching noise; ±1 % accuracy ensures compliance with USB electrical specs. | Use Scenario: Powers servo motor drivers and spindle controller ICs in 2.5-inch HDDs requiring stable 2.85 V bias. IC Role / Device Role / Timing Role: Primary low-noise local regulator for analog front-end and actuator control circuitry. Use Value: SOA control prevents thermal failure during sudden load surges; 1 A rating supports peak motor startup currents. |
| Battery Charger Management | Industrial Point-of-Load Regulation |
Use Scenario: Supplies 2.85 V to fuel gauge ICs and charging status LEDs in Li-ion portable equipment. IC Role / Device Role / Timing Role: Low-quiescent (5–6 mA), no-minimum-load LDO enabling long shelf-life in battery-backed systems. Use Value: Dropout ≤1.2 V allows operation down to 4.05 V input-extends usable battery range in single-cell designs. | Use Scenario: Delivers 2.85 V to FPGA I/O banks or microcontroller peripherals in factory automation PLC modules. IC Role / Device Role / Timing Role: Local regulation for noise-sensitive digital interfaces; withstands industrial ambient temperatures up to 125 °C. Use Value: −40 °C to 125 °C rating eliminates need for derating; 72 K/W thermal resistance simplifies heatsink design on FR4 PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117-285CDCYR | ±2 % output accuracy; 800 mA max output; higher dropout (1.3 V @ 800 mA) | Limited to less demanding consumer applications due to looser tolerance and lower current | Select when cost sensitivity outweighs precision and full 1 A capability |
| LD1117S285TR | ±2 % accuracy; 800 mA max; no SOA control; thermal shutdown at 160 °C | Higher thermal trip point reduces protection margin; unsuitable for sustained high-Vin−Vout operation | Choose only for non-critical, low-power industrial use where SOA control is not required |
Compared with TLV1117-285CDCYR and LD1117S285TR, the NX1117C285Z,115 delivers tighter 2.85 V regulation (±1 %), full 1 A output with SOA protection, and lower dropout-making it preferred for USB, HDD, and battery-charger designs demanding reliability and precision.
Availability
NX1117C285Z,115 is available at Aetrix Electronics and suitable for USB devices, hard drive controllers, and battery charger applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for NX1117C285Z,115 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The NX1117C series was designed for high-reliability, medium-current linear regulation in space-constrained applications-emphasizing thermal robustness, precision output, and seamless integration with switching DC-DC stages.
FAQ
What is the maximum input voltage for the NX1117C285Z,115?
The NX1117C285Z,115 supports a maximum input voltage of 20 V per absolute maximum ratings. However, its recommended operating input range is 4.25 V to 10 V for stable 2.85 V output at full 1 A load. Exceeding 10 V may trigger SOA current limiting or reduce thermal margin depending on PCB layout and ambient conditions.
Does the NX1117C285Z,115 require an external capacitor on the output?
Yes, the NX1117C285Z,115 requires a minimum 680 nF ceramic output capacitor with ≤1 Ω ESR, placed as close as possible to pins 2 and 4. This capacitor ensures stability, improves transient response, and reduces output noise. Larger values (e.g., 10 µF) further enhance load-step immunity, as shown in the NX1117C285Z,115 load transient response curves.
Is the NX1117C285Z,115 pin-compatible with other SOT223 LDOs?
The NX1117C285Z,115 uses the standard SOT223 pinout (GND–VOUT–VIN–VOUT), matching industry-standard footprints. However, pin compatibility alone does not guarantee functional equivalence-differences in SOA behavior, thermal shutdown threshold (135 °C), and ±1 % accuracy mean direct substitution requires validation of load, input range, and thermal environment for the NX1117C285Z,115.
What is the thermal shutdown temperature of the NX1117C285Z,115?
The NX1117C285Z,115 activates thermal shutdown at a junction temperature of 135 °C, as specified in Table 7. Once triggered, the device disables output until junction temperature falls below the hysteresis threshold (~15 °C below trip point). This protects against permanent damage during overload or poor heatsinking conditions in the NX1117C285Z,115.
Can the NX1117C285Z,115 be used without a minimum load?
Yes, the NX1117C285Z,115 has no minimum load requirement for regulation-unlike many older LDOs. It maintains 2.85 V output accuracy from 0 mA to 800 mA load across its full operating temperature range. This feature simplifies design in low-power or intermittent-use applications where the NX1117C285Z,115 supplies standby circuitry or sensors.
NX1117C285Z,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- 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):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 63dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-73
NX1117C285Z,115 FAQ
1.How can I place an order for NX1117C285Z,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for NX1117C285Z,115 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 NX1117C285Z,115 reliable?
The price and inventory of NX1117C285Z,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NX1117C285Z,115 is usually 5 days.
3.What payment methods are accepted for NX1117C285Z,115?
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Once your NX1117C285Z,115 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 NX1117C285Z,115?
For technical support, including NX1117C285Z,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NX1117C285Z,115 requirements.
6.How does Aetrix verify that NX1117C285Z,115 is sourced from the original manufacturer or authorized distributors?
All NX1117C285Z,115 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 NX1117C285Z,115 meets industry standards.
7.What is the process for return or replacement of NX1117C285Z,115?
All NX1117C285Z,115 units undergo pre-shipment inspection (PSI). If there is an issue with NX1117C285Z,115, 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 NX1117C285Z,115 part is unused and in its original packaging.
Return procedure for NX1117C285Z,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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