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onsemi NCP140AMXC280TCG
- Part No.:
- NCP140AMXC280TCG
- Manufacturer:
- onsemi
- Package:
- 4-XFDFN Exposed Pad
- Datasheet:
-
NCP140AMXC280TCG.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,131
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Product details
Overview
NCP140AMXC280TCG from onsemi is a 150 mA, capacitor-free, low-noise LDO voltage regulator with fixed 2.8 V output, ±1% accuracy at 25°C, 125 mV dropout at 150 mA (for 3.3 V variant; 2.8 V dropout is 145 mV per datasheet Fig. 13/14), and ultra-low quiescent current (45 µA typ.). It operates from 1.6 V to 5.5 V input and targets space-constrained, battery-powered systems requiring clean, stable power with minimal BOM.
For engineers reviewing the NCP140AMXC280TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its capacitor-free stability, active output discharge capability (A-series), XDFN4 0.8 mm × 0.8 mm package, thermal shutdown (160°C), and PSRR of 55 dB at 1 kHz - all critical for wearable electronics and portable imaging subsystems.
Technical Context
The NCP140AMXC280TCG uses a PMOS pass transistor architecture enabling true capacitor-free operation across temperature and load, with integrated soft-start, bandgap reference, and enable logic. Its internal current limit (230 mA typ.) and short-circuit protection (250 mA) operate over −40°C to +85°C junction range without derating.
Thermal management relies on the exposed pad (EPAD) soldered directly to GND, delivering RJA = 252°C/W (XDFN4 0.8×0.8 mm). Active discharge - enabled only in "A" variants like NCP140AMXC280TCG - pulls OUT to GND via 100 Ω when EN < 0.4 V, ensuring rapid rail collapse in power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±1% at 25°C; ensures precise biasing for 2.8 V logic rails and analog sensors without external feedback. |
| Max Output Current | 150 mA continuous; supports moderate-power peripherals like image sensors or BLE radios in compact devices. |
| Dropout Voltage | 145 mV at 150 mA (VOUT = 2.8 V); enables regulation from 2.945 V input, maximizing battery runtime in single-cell Li-ion systems. |
| Quiescent Current | 45 µA typical; reduces standby power loss in always-on wearables and IoT edge nodes. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from DC-DC converters feeding the LDO input, critical for RF and audio signal chains. |
| Enable Threshold | VENH = 0.9 V, VENL = 0.4 V; compatible with 1.8 V and 3.3 V GPIOs for reliable digital control without level-shifting. |
| Thermal Shutdown | 160°C activation with 20°C hysteresis; prevents permanent damage during transient overload or poor PCB heatsinking. |
Pinout & Package
XDFN4 package (Case 711BF), 0.8 mm × 0.8 mm × 0.4 mm, with exposed thermal pad (EPAD) requiring direct connection to GND plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Regulated output voltage node | Delivers stable 2.8 V; may be decoupled with small ceramic cap for improved transient response - not required for stability. |
| 2: GND | Power ground reference | Common return for IN, OUT, and EN; EPAD must be soldered to this node for thermal and electrical integrity. |
| 3: EN | Logic-enable control input | Drives high (>0.9 V) to activate regulator; low (<0.4 V) disables it and engages active discharge (100 Ω pull-down to GND). |
| 4: IN | Unregulated input supply | Accepts 1.6–5.5 V; internal PMOS body diode requires external reverse-current protection if VOUT > VIN possible. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with zero input/output capacitance - eliminates two BOM items and PCB area in ultra-miniaturized designs. |
| Active output discharge | 100 Ω internal pull-down on OUT during disable (A-series only) - ensures fast, controlled rail discharge for safe power sequencing. |
| Ultra-low noise | 17 µVRMS (100 Hz–100 kHz); preserves SNR in precision analog front-ends like camera ISPs and ADC references. |
| Low dropout & wide VIN | 145 mV dropout at 150 mA + 1.6–5.5 V input range - supports direct regulation from partially discharged Li-ion (2.8–4.2 V) or USB 3.3 V rails. |
| Pb-free, RoHS-compliant | XDFN4 package meets environmental compliance requirements for global consumer and medical electronics markets. |
Applications
| Smartphone Camera Module | Wearable Heart Rate Sensor |
|---|---|
Use Scenario: Powers CMOS image sensor and ISP in slim smartphone bezel modules where board space is constrained and EMI sensitivity is high. IC Role / Device Role / Timing Role: Low-noise, capacitor-free LDO providing clean 2.8 V bias to analog pixel array and timing-critical clock buffers. Use Value: Eliminates need for output capacitor near sensor die, reducing layout complexity and avoiding resonance-induced image noise. |
Use Scenario: Supplies optical heart rate monitor ASIC in wrist-worn fitness tracker with strict size and battery life requirements. IC Role / Device Role / Timing Role: Enables ultra-low-quiescent-power 2.8 V rail that remains active during sleep mode while supporting fast wake-up bursts. Use Value: 45 µA IQ extends battery life beyond 7 days on coin cell; active discharge ensures safe sensor reset between measurements. |
| Bluetooth LE Audio Earbud | Industrial Handheld Scanner |
Use Scenario: Regulates power to Bluetooth audio SoC and MEMS microphone in TWS earbud housing under tight thermal limits. IC Role / Device Role / Timing Role: Delivers stable 2.8 V with high PSRR to reject noise from Class-D amplifier and RF transceiver switching. Use Value: 55 dB PSRR at 1 kHz prevents audible switching artifacts; XDFN4 0.8×0.8 mm fits within 3.5 mm earbud stem cavity. |
Use Scenario: Provides regulated 2.8 V to laser driver and barcode decoder IC in rugged handheld scanner operating across −20°C to +60°C ambient. IC Role / Device Role / Timing Role: Maintains ±1% output accuracy over full temperature range and handles 150 mA pulsed loads during scan bursts. Use Value: Dropout of 145 mV allows use with aging alkaline batteries; thermal shutdown protects against sustained high-current operation in hot environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 150 mA, 2.8 V fixed, 6 µA IQ, no active discharge, SOT-23-5 package (2.9×1.6 mm) | Larger footprint, lower IQ, no rail discharge - suitable for cost-sensitive, non-sequencing applications. | Choose when ultra-low standby current outweighs size and sequencing needs. |
| Torex XC6210B282MR-G | 150 mA, 2.8 V fixed, 1.0 µA IQ, no active discharge, USP-4 package (1.2×1.2 mm) | Smaller IQ but larger package than XDFN4 0.8×0.8 mm; lacks active discharge and thermal shutdown. | Prefer for ultra-long-life battery applications where sequencing and fault protection are secondary. |
Compared with MCP1700T-2802E/TT and XC6210B282MR-G, the NCP140AMXC280TCG uniquely combines capacitor-free operation, active discharge, and industry-leading size (0.64 mm²), making it optimal for next-gen miniaturized, sequenced power domains.
Availability
NCP140AMXC280TCG is available at Aetrix Electronics and suitable for smartphone camera modules, wearable biosensors, Bluetooth LE audio earbuds, and industrial handheld scanners requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NCP140AMXC280TCG 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 specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and consumer markets.
The NCP140 series was designed specifically for ultra-compact, battery-powered applications demanding capacitor-free LDOs with low noise, low IQ, and robust thermal protection - targeting wearables, mobile imaging, and portable medical devices.
FAQ
What is the dropout voltage of the NCP140AMXC280TCG at full load?
The NCP140AMXC280TCG exhibits a typical dropout voltage of 145 mV at 150 mA output current and 2.8 V nominal output, as confirmed by Figure 13 in the datasheet. This enables efficient regulation from inputs as low as 2.945 V, extending usable battery voltage range in single-cell Li-ion systems.
Does the NCP140AMXC280TCG require input or output capacitors to remain stable?
No - the NCP140AMXC280TCG is explicitly designed for capacitor-free operation. It remains stable with or without input and output capacitors across all load and temperature conditions, eliminating two BOM line items and saving PCB area. Capacitors may be added optionally to improve PSRR or transient response.
Is active output discharge supported on the NCP140AMXC280TCG?
Yes - the "A" suffix in NCP140AMXC280TCG denotes active output discharge capability. When the EN pin is driven below 0.4 V, an internal 100 Ω resistor pulls the OUT pin to GND, ensuring rapid and controlled discharge of downstream capacitance during power-down sequencing.
What package type and dimensions does the NCP140AMXC280TCG use?
The NCP140AMXC280TCG uses the XDFN4 package (Case 711BF), measuring 0.8 mm × 0.8 mm × 0.4 mm with 0.48 mm pitch. It features an exposed thermal pad (EPAD) that must be soldered directly to the GND plane for effective heat dissipation and optimal RJA = 252°C/W performance.
What is the maximum junction temperature and thermal protection behavior of the NCP140AMXC280TCG?
The NCP140AMXC280TCG activates thermal shutdown at 160°C (typical) and remains latched off until junction temperature falls to ~140°C due to 20°C hysteresis. This protects against catastrophic failure during overload or inadequate heatsinking, and is fully characterized across −40°C to +85°C ambient operating range.
NCP140AMXC280TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- -
- PSRR:
- 62dB ~ 55dB (100Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (0.8x0.8)
NCP140AMXC280TCG FAQ
1.How can I place an order for NCP140AMXC280TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP140AMXC280TCG 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 NCP140AMXC280TCG reliable?
The price and inventory of NCP140AMXC280TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP140AMXC280TCG is usually 5 days.
3.What payment methods are accepted for NCP140AMXC280TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP140AMXC280TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP140AMXC280TCG?
NCP140AMXC280TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP140AMXC280TCG 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 NCP140AMXC280TCG?
For technical support, including NCP140AMXC280TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP140AMXC280TCG requirements.
6.How does Aetrix verify that NCP140AMXC280TCG is sourced from the original manufacturer or authorized distributors?
All NCP140AMXC280TCG 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 NCP140AMXC280TCG meets industry standards.
7.What is the process for return or replacement of NCP140AMXC280TCG?
All NCP140AMXC280TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP140AMXC280TCG, 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 NCP140AMXC280TCG part is unused and in its original packaging.
Return procedure for NCP140AMXC280TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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