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onsemi NCP186BMX280TAG
- Part No.:
- NCP186BMX280TAG
- Manufacturer:
- onsemi
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
NCP186BMX280TAG.pdf
- Description:
- IC REG LINEAR 2.8V 1A 8XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
NCP186BMX280TAG from onsemi is a 1 A CMOS low-dropout (LDO) regulator with fixed 2.8 V output, 1.8–5.5 V input range, and 100 mV typical dropout at 1 A. It features ±1% output voltage accuracy, 90 µA typical quiescent current, thermal shutdown at 165°C, and operates without output discharge functionality. It powers noise-sensitive analog circuitry in portable image sensors and battery-powered communication modules.
For engineers reviewing the NCP186BMX280TAG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at 2.8 V output, stability with 1 µF ceramic capacitors, EN pin logic thresholds, thermal resistance in XDFN8 package, and absence of active output discharge.
Technical Context
The NCP186BMX280TAG implements a PMOS pass transistor architecture enabling low dropout and reverse-current protection via inherent body diode behavior. Its adaptive ground current design maintains 90 µA typical quiescent current across load and temperature ranges.
Internal soft-start suppresses inrush current during enable, while over-current and thermal shutdown protections operate independently of external components. The FB/ADJ pin supports both fixed-output configuration (direct connection to OUT) and adjustable configurations using resistor dividers - though NCP186BMX280TAG is factory-configured for fixed 2.8 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±1% over −40°C to +125°C; ensures stable bias for RF front-ends and ADC reference supplies. |
| Dropout Voltage | 110 mV typ. at 1 A (VIN ≥ 2.91 V); enables operation from single-cell Li-ion (3.0 V min) with margin. |
| Quiescent Current | 90 µA typ. at no load; minimizes standby power loss in always-on sensor nodes. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Output Noise | 48 µVRMS (10 Hz–100 kHz); suitable for powering precision analog signal chains without added filtering. |
| Thermal Shutdown | 165°C activation with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB heat sinking. |
| Enable Threshold | VENH = 1.0 V min, VENL = 0.4 V max; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
Pinout & Package
XDFN8 1.2 mm × 1.6 mm, 0.4 mm pitch, exposed thermal pad (EPAD). Package optimized for space-constrained portable designs and supports high thermal dissipation when EPAD is soldered to GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT | LDO regulated output; connects directly to load; requires local 1 µF ceramic capacitor to GND. |
| 3 | N/C | No internal connection; may be tied to GND plane to improve thermal conduction from EPAD. |
| 4 | FB/ADJ | Feedback input; internally connected to 2.8 V reference; must be shorted to OUT for fixed-output operation. |
| 5 | GND | Analog and power ground reference; connects to system GND plane and EPAD for thermal management. |
| 6 | EN | Active-high enable; pulls down internally at 150 nA; ties to VIN if always-on operation required. |
| 7, 8 | IN | Input supply rail; accepts 1.8–5.5 V; requires local 1 µF ceramic capacitor close to pins 7/8. |
| EPAD | Thermal Pad | Exposed copper pad; recommended to connect to large GND copper area for θJA = 111°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 90 µA typ. at zero load enables >1-year battery life in intermittent-sensing IoT nodes. |
| Stable with minimal capacitance | Guaranteed stability with 1 µF X7R/X5R ceramic output capacitor - reduces BOM count and board area. |
| Fast transient response | Sub-10 µs recovery from 1 mA ↔ 1 A load steps; preserves signal integrity in burst-mode imaging systems. |
| Integrated protection suite | Combines over-current limit (1.4 A typ.), thermal shutdown (165°C), and reverse-current blocking - eliminates need for external protection devices. |
| Logic-compatible enable | EN pin accepts standard 1.8 V/3.3 V microcontroller outputs without pull-up resistors or level shifters. |
Applications
| Mobile Camera Modules | Wearable Health Sensors |
|---|---|
Use Scenario: Powering CIS (CMOS Image Sensor) analog core and PLL circuits in smartphones and action cameras. IC Role / Device Role / Timing Role: Primary 2.8 V LDO delivering clean, low-noise bias to image sensor pixel array and timing generator. Use Value: 48 µVRMS output noise and 75 dB PSRR prevent fixed-pattern noise and clock spurs in captured imagery. | Use Scenario: Supplying ECG/PPG analog front-end (AFE) and ultra-low-power MCU in fitness bands and medical patches. IC Role / Device Role / Timing Role: Always-on 2.8 V regulator for signal conditioning path; enabled only during measurement bursts. Use Value: 90 µA quiescent current extends coin-cell battery life beyond 6 months in duty-cycled operation. |
| Industrial Handheld Scanners | LPWA IoT Edge Nodes |
Use Scenario: Providing regulated 2.8 V to laser diode driver and barcode decoder ASIC in ruggedized handheld scanners. IC Role / Device Role / Timing Role: Input-stage LDO isolating sensitive decoder logic from noisy motor and RF sections. Use Value: 110 mV dropout allows operation down to 2.91 V input - critical for maintaining function as Li-ion discharges to 3.0 V. | Use Scenario: Biasing LoRaWAN or NB-IoT transceiver RF power amplifier and crystal oscillator in remote sensor nodes. IC Role / Device Role / Timing Role: Secondary LDO generating stable 2.8 V from main 3.3 V rail for RF section isolation. Use Value: Thermal shutdown and over-current protection ensure reliability in unattended outdoor deployments with wide ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0528PDBVR | 200 mA output, 25 µA IQ, 170 mV dropout at 200 mA; SOT-23-5 package | Lower current capacity limits use to sub-200 mA loads; smaller footprint but higher thermal resistance | Select when ultra-low IQ dominates over output current and board space is constrained. |
| NCP177BMX280TBG | Same 1 A rating and 2.8 V output, but DFN12 4×4 mm package; θJA = 44°C/W vs. 111°C/W | Better thermal performance enables higher ambient temperature operation or higher continuous load | Select when thermal headroom is critical and board area permits larger 4×4 mm footprint. |
Compared with TPS7A0528PDBVR and NCP177BMX280TBG, the NCP186BMX280TAG delivers optimal balance of 1 A capability, ultra-low noise, and compact XDFN8 size - making it ideal for space-limited, noise-sensitive 2.8 V applications where thermal constraints permit its 111°C/W junction-to-ambient resistance.
Availability
NCP186BMX280TAG is available at Aetrix Electronics and suitable for mobile camera modules, wearable health sensors, and industrial handheld scanners requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for NCP186BMX280TAG 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 for automotive, industrial, cloud, and sensing applications.
The NCP186 series targets portable and battery-powered systems demanding low-noise, fast-transient LDOs in ultra-small packages - specifically engineered for image sensors, RF ICs, and precision analog subsystems.
FAQ
What is the maximum input voltage for the NCP186BMX280TAG?
The NCP186BMX280TAG supports an absolute maximum input voltage of 6.0 V. However, its operational input range is specified from 1.8 V to 5.5 V. Exceeding 5.5 V may compromise long-term reliability even if within absolute maximum ratings, and operation above 6.0 V risks immediate device failure. For robust design, maintain VIN ≤ 5.5 V under all conditions including ripple and transients.
Does the NCP186BMX280TAG include output discharge functionality?
No, the NCP186BMX280TAG does not include output discharge functionality. The "B" suffix explicitly denotes the version without active discharge. When disabled via the EN pin, the output remains floating and decays only through external load paths. This differs from the "A" variant (e.g., NCP186AMX280TAG), which integrates a 34 Ω discharge resistor between OUT and GND during disable.
Can the NCP186BMX280TAG be used with ceramic capacitors smaller than 1 µF?
The NCP186BMX280TAG is guaranteed stable with a minimum effective output capacitance of 0.8 µF, but 1 µF is the recommended value for optimal dynamic performance. Using smaller ceramics (e.g., 0.47 µF) may degrade load transient response and increase output voltage deviation under step-load changes. Always verify stability with actual PCB layout and capacitor DC-bias derating, especially for 0201/0402 packages.
What is the thermal resistance (θJA) of the NCP186BMX280TAG in its XDFN8 package?
The NCP186BMX280TAG in XDFN8 (Case 711AS) has a typical junction-to-ambient thermal resistance (θJA) of 111°C/W when mounted on a standard JEDEC 2-layer test board. Actual θJA improves significantly with increased copper area connected to the EPAD and GND pins - e.g., adding a 100 mm² thermal pad can reduce θJA to ~65°C/W.
How does the enable pin (EN) behave when left unconnected on the NCP186BMX280TAG?
When the EN pin is left unconnected, the NCP186BMX280TAG remains disabled due to an internal 150 nA pull-down current source. This ensures default-off behavior for safety-critical or power-sensitive systems. To enable the device permanently, tie EN directly to the IN pin - no external resistor is required.
NCP186BMX280TAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-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):
- 0.17V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-XDFN (1.6x1.2)
NCP186BMX280TAG FAQ
1.How can I place an order for NCP186BMX280TAG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP186BMX280TAG 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 NCP186BMX280TAG reliable?
The price and inventory of NCP186BMX280TAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP186BMX280TAG is usually 5 days.
3.What payment methods are accepted for NCP186BMX280TAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP186BMX280TAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP186BMX280TAG?
NCP186BMX280TAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP186BMX280TAG 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 NCP186BMX280TAG?
For technical support, including NCP186BMX280TAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP186BMX280TAG requirements.
6.How does Aetrix verify that NCP186BMX280TAG is sourced from the original manufacturer or authorized distributors?
All NCP186BMX280TAG 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 NCP186BMX280TAG meets industry standards.
7.What is the process for return or replacement of NCP186BMX280TAG?
All NCP186BMX280TAG units undergo pre-shipment inspection (PSI). If there is an issue with NCP186BMX280TAG, 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 NCP186BMX280TAG part is unused and in its original packaging.
Return procedure for NCP186BMX280TAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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