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NXP Semiconductors NX1117CEADJZ,115
- Part No.:
- NX1117CEADJZ,115
- Manufacturer:
- NXP Semiconductors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NX1117CEADJZ,115.pdf
- Description:
- IC REG LINEAR POS ADJ 1A SC73
- Quantity:
- Payment:
- Shipping:
Inventory:2,488
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Product details
Overview
NX1117CEADJZ,115 from NXP Semiconductors is an adjustable-output low-dropout linear voltage regulator in SOT223 package, delivering up to 1 A output current with ±1.25 % output voltage accuracy, 1.25 V reference voltage, and dropout voltage as low as 0.95 V at 100 mA - used for post-regulation in DC-DC converter outputs and USB power rails.
For engineers reviewing the NX1117CEADJZ,115 datasheet, NX1117CEADJZ,115 pinout, NX1117CEADJZ,115 application, or NX1117CEADJZ,115 equivalent, key selection criteria include adjustable output configuration (ADJ pin), thermal shutdown behavior, SOA-controlled current limiting, and compatibility with standard 680 nF input/output capacitors in industrial temperature range (−40 °C to +125 °C).
Technical Context
The NX1117CEADJZ,115 implements internal bandgap reference (1.25 V) and error amplifier feedback to regulate output via external resistor divider on the ADJ pin. Its Safe Operating Area (SOA) control dynamically limits output current under high VIN–VOUT conditions to prevent thermal runaway.
It features integrated thermal shutdown triggered at 135 °C junction temperature, output current limiting (1.0–1.5 A typical), and no minimum load requirement - enabling stable operation even at light loads in battery-powered or low-power USB applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A maximum - supports high-current point-of-load regulation without external pass transistor. |
| Reference Voltage | 1.250 V (±1.25 %) - sets precise output via R1/R2 divider; enables 1.25 V to >20 V adjustable range. |
| Dropout Voltage | 0.95 V @ 100 mA - allows regulation from 2.2 V input to 1.25 V output, critical for low-voltage battery systems. |
| Input Voltage Range | Up to 20 V - accommodates wide-input post-regulation after buck converters or unregulated wall adapters. |
| Thermal Shutdown | 135 °C - protects against sustained overload or poor PCB heatsinking in enclosed industrial enclosures. |
| Operating Temperature | −40 °C to +125 °C - qualified for automotive under-hood and industrial control environments. |
| Quiescent Current | 5–6 mA - low enough for always-on subsystems while maintaining fast transient response. |
Pinout & Package
SOT223 (SC-73) plastic surface-mount package with exposed thermal pad (pin 2 and 4 both connected to VOUT for enhanced heat dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | ADJ | Adjust terminal - connects to resistor divider midpoint; sets output voltage via VOUT = Vref × (1 + R1/R2) + Iadj × R1. |
| 2 | VOUT | Main output terminal - also electrically tied to thermal pad; requires low-ESR capacitor (≥680 nF) for stability. |
| 3 | VIN | Input supply terminal - accepts up to 20 V; must be decoupled with ≥680 nF ceramic capacitor near pin. |
| 4 | VOUT | Secondary output terminal - paralleled with pin 2 to reduce trace resistance and improve current sharing/thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Configuration | Enables custom output voltages from 1.25 V upward using two external resistors - eliminates need for multiple fixed-voltage SKUs. |
| SOA-Controlled Current Limiting | Prevents destructive power dissipation during overvoltage transients by reducing current as VIN–VOUT increases - no external foldback circuit required. |
| No Minimum Load Requirement | Stable regulation down to 0 mA output - suitable for standby modes and intermittent-load applications like USB suspend states. |
| Low RMS Output Noise | 0.003 % RMS (10 Hz–10 kHz) - meets noise-sensitive analog supply requirements without additional filtering. |
| High PSRR at 120 Hz | 69 dB (adjustable versions) - effectively suppresses ripple from switching DC-DC pre-regulators feeding this LDO. |
Applications
| Post Regulator for Switching DC-DC Converter | Battery Charger Power Path |
|---|---|
Use Scenario: Clean, low-noise 3.3 V rail derived from a noisy 5 V buck converter output in embedded microcontroller systems. IC Role / Device Role / Timing Role: Final-stage linear regulator providing ripple-free supply to MCU core and ADC reference. Use Value: 69 dB PSRR at 120 Hz and 0.003 % RMS noise ensure accurate 12-bit ADC conversions unaffected by upstream switching artifacts. | Use Scenario: Constant-voltage stage in single-cell Li-ion charger managing termination voltage precision and thermal safety. IC Role / Device Role / Timing Role: Adjustable LDO setting exact 4.2 V charge termination voltage via resistor divider on ADJ pin. Use Value: ±1.25 % output accuracy and −40 °C to +125 °C operation guarantee safe, repeatable full-charge cutoff across environmental extremes. |
| USB Peripheral Power Supply | Industrial Point-of-Load Regulation |
Use Scenario: 5 V-to-3.3 V conversion for USB 2.0 hub ICs and associated PHYs requiring clean, regulated I/O supply. IC Role / Device Role / Timing Role: Low-dropout regulator delivering stable 3.3 V from host-supplied 5 V bus, tolerant of USB voltage sag. Use Value: 0.95 V dropout at 100 mA ensures regulation remains active even when USB port drops to 4.4 V under load. | Use Scenario: Local 2.5 V supply for FPGA I/O banks in programmable logic controllers with ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Fixed or adjustable LDO placed directly adjacent to FPGA power pins to minimize IR drop and noise coupling. Use Value: SOT223 thermal pad and 72 K/W Rth(j-a) on 6 cm² copper enable 1 A delivery without forced air, simplifying enclosure design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117ADJ | ±1 % reference accuracy; higher quiescent current (up to 10 mA); same SOT223 package and ADJ pin topology. | Preferred where tighter initial output tolerance is required, e.g., precision sensor biasing. | Select TLV1117ADJ if reference accuracy < ±1.25 % is mandatory and higher IQ is acceptable. |
| LD1117S25TR | Fixed 2.5 V output only; ±2 % accuracy; no ADJ pin; identical 1 A rating and SOT223 footprint. | Only suitable for fixed-voltage use cases - not a functional substitute for adjustable operation. | Choose LD1117S25TR only when replacing fixed 2.5 V variants, not for NX1117CEADJZ,115's adjustable function. |
Compared with TLV1117ADJ and LD1117S25TR, the NX1117CEADJZ,115 offers optimal balance of adjustability, industrial temperature range, and SOA protection - making it uniquely suited for ruggedized USB and battery-charger designs where dynamic load and input variation are expected.
Availability
NX1117CEADJZ,115 is available at Aetrix Electronics and suitable for post-regulation, USB peripheral power, battery charging, industrial point-of-load, and consumer equipment applications requiring stable component supply and long-term manufacturability.
Supply support for NX1117CEADJZ,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/NX1117CE series was designed specifically for high-reliability, medium-power linear regulation in space-constrained industrial and consumer systems - emphasizing thermal robustness, wide input range, and ease of use with minimal external components.
FAQ
What is the output voltage range supported by the NX1117CEADJZ,115?
The NX1117CEADJZ,115 is an adjustable LDO whose output voltage is set externally via two resistors connected to the ADJ pin. With its 1.25 V internal reference and typical Iadj of 52–120 µA, it supports output voltages from 1.25 V up to approximately 20 V depending on resistor selection and power dissipation limits. The NX1117CEADJZ,115 datasheet specifies VOUT = Vref × (1 + R1/R2) + Iadj × R1 as the governing equation.
Does the NX1117CEADJZ,115 require a minimum load current to maintain regulation?
No, the NX1117CEADJZ,115 does not require a minimum load current for stable regulation. Unlike older LDO architectures, it maintains output accuracy and transient response down to 0 mA load - confirmed in Table 8 of the NXP datasheet under "minimum output current required for regulation" (0.8–5 mA typical, but regulation holds at 0 mA). This makes the NX1117CEADJZ,115 ideal for low-power sleep modes.
How does the SOA control function in the NX1117CEADJZ,115?
The SOA (Safe Operating Area) control in the NX1117CEADJZ,115 actively reduces output current as the voltage difference between VIN and VOUT increases - preventing excessive power dissipation and thermal runaway. As shown in Figure 9 of the datasheet, Iout(lim) decreases from ~1.5 A at VIN–VOUT = 2 V to ~0.7 A at VIN–VOUT = 16 V. This feature eliminates the need for external current-limiting circuitry in variable-input applications.
What is the recommended input and output capacitance for the NX1117CEADJZ,115?
NXP specifies 680 nF ceramic capacitors (with ≤1 Ω ESR) for both input (Cin) and output (Cout) in the NX1117CEADJZ,115 datasheet (Table 8 test conditions). These values ensure stability across the full operating range. Larger values (e.g., 10 µF) are acceptable and improve transient response, as demonstrated in Figures 15–18, but 680 nF is the minimum validated value for guaranteed stability.
Can the NX1117CEADJZ,115 be used in automotive applications?
The NX1117CEADJZ,115 is rated for −40 °C to +125 °C junction temperature and includes thermal shutdown at 135 °C, meeting under-hood ambient requirements. However, NXP explicitly states in Section 17.3 that its products are *not* designed or warranted for safety-critical automotive systems (e.g., ADAS, braking, airbag control). It may be used in non-safety automotive subsystems (infotainment power, body control modules) subject to customer validation per AEC-Q100 stress testing.
NX1117CEADJZ,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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 18.8V
- Voltage Dropout (Max):
- 1.2V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- -
- PSRR:
- 69dB (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
NX1117CEADJZ,115 FAQ
1.How can I place an order for NX1117CEADJZ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for NX1117CEADJZ,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 NX1117CEADJZ,115 reliable?
The price and inventory of NX1117CEADJZ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NX1117CEADJZ,115 is usually 5 days.
3.What payment methods are accepted for NX1117CEADJZ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NX1117CEADJZ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NX1117CEADJZ,115?
NX1117CEADJZ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NX1117CEADJZ,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 NX1117CEADJZ,115?
For technical support, including NX1117CEADJZ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NX1117CEADJZ,115 requirements.
6.How does Aetrix verify that NX1117CEADJZ,115 is sourced from the original manufacturer or authorized distributors?
All NX1117CEADJZ,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 NX1117CEADJZ,115 meets industry standards.
7.What is the process for return or replacement of NX1117CEADJZ,115?
All NX1117CEADJZ,115 units undergo pre-shipment inspection (PSI). If there is an issue with NX1117CEADJZ,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 NX1117CEADJZ,115 part is unused and in its original packaging.
Return procedure for NX1117CEADJZ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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