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onsemi NCP140AMXD180TCG
- Part No.:
- NCP140AMXD180TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP140AMXD180TCG.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
NCP140AMXD180TCG from onsemi is a 150 mA, capacitor-free, low-noise LDO voltage regulator with fixed 1.8 V output, ±1% accuracy at 25°C, 125 mV dropout at 150 mA (for 3.3 V variant), and 45 µA typical quiescent current-designed for space-constrained, battery-powered systems such as smartphones and wearables.
For engineers reviewing the NCP140AMXD180TCG datasheet, pinout, applications, or equivalent options, key selection criteria include active output discharge capability, XDFN4 1.0 mm × 1.0 mm package compatibility, stability without external capacitors, and thermal shutdown at 160°C.
Technical Context
The NCP140AMXD180TCG integrates a PMOS pass transistor with internal bandgap reference, soft-start, thermal shutdown, and current-limit protection. Its enable logic supports 0.9 V turn-on and 0.4 V shutdown thresholds, and the A-series variant includes active output discharge via a 100 Ω pull-down path when disabled.
This device operates across 1.6 V to 5.5 V input range, delivers regulated 1.8 V output, and maintains stability with or without input/output capacitors-enabling minimal BOM count and footprint in ultra-thin portable designs where power density and standby leakage are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V - eliminates need for external feedback resistors and ensures precise rail generation for core logic or memory I/O. |
| Output Current | 150 mA continuous - sufficient for powering microcontrollers, sensors, or RF front-end bias circuits in compact edge devices. |
| Quiescent Current | Typ. 45 µA - enables multi-week battery life in always-on wearable or IoT sensor nodes with infrequent wake cycles. |
| Dropout Voltage | 255 mV max at 150 mA (1.8 V output) - allows operation from single-cell Li-ion (3.0–4.2 V) or coin-cell (3.0 V) sources with margin. |
| PSRR | 55 dB @ 1 kHz - suppresses switching noise from adjacent DC-DC converters, preserving signal integrity in mixed-signal SoC power domains. |
| Output Noise | 17 µVRMS (100 Hz–100 kHz) - meets low-noise requirements for ADC references, audio codecs, and precision analog circuitry. |
| Thermal Shutdown | 160°C trip, 20°C hysteresis - protects against sustained overload or poor PCB thermal design without requiring external thermal monitoring. |
Pinout & Package
XDFN4 package (Case 711AJ), 1.0 mm × 1.0 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 1.8 V; may be decoupled with small ceramic cap to improve transient response-optional due to inherent capacitor-free stability. |
| 2 - GND | Ground reference and thermal return | Primary return path for load current and thermal conduction; EPAD must be soldered to large GND copper area for RJA = 265°C/W. |
| 3 - EN | Enable control input | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables regulator and activates 100 Ω output discharge (A-series only). |
| 4 - IN | Input voltage supply | Accepts 1.6–5.5 V; internal PMOS body diode requires external reverse-current protection if VOUT > VIN is possible. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable with zero input/output capacitance-reduces BOM count, PCB area, and cost in size-limited applications like TWS earbuds. |
| Active output discharge | 100 Ω internal pull-down activated during disable-ensures rapid VOUT decay to prevent latch-up or back-powering of downstream circuitry. |
| Ultra-low quiescent current | 45 µA typical - extends battery runtime in always-on sensing modes without compromising start-up speed or regulation accuracy. |
| High PSRR at low frequency | 62 dB @ 100 Hz - effectively filters ripple from buck converter outputs feeding shared power rails in multi-rail systems. |
| Wide input voltage range | 1.6 V to 5.5 V - supports direct connection to Li-ion, NiMH, or USB-supplied inputs without pre-regulation stages. |
Applications
| Smartphone Core Rail | Wearable Sensor Node |
|---|---|
Use Scenario: Powering application processor I/O banks or low-power MCU cores in sub-5 mm thick mobile handsets. IC Role / Device Role / Timing Role: Primary 1.8 V LDO delivering clean, fast-transient power with no external caps to minimize board thickness. Use Value: Eliminates two 0402 ceramic capacitors per rail, saving 0.32 mm² PCB area and reducing assembly cost by $0.008/unit at scale. |
Use Scenario: Supplying MEMS accelerometers and BLE radio transceivers in wrist-worn health monitors. IC Role / Device Role / Timing Role: Always-on 1.8 V regulator enabling <10 µA system sleep current while maintaining instant wake capability. Use Value: 45 µA IQ and active discharge ensure 12+ month coin-cell lifetime and safe state transition between sleep/wake cycles. |
| Digital Camera Image Sensor Bias | IoT Edge Node Microcontroller |
Use Scenario: Providing noise-sensitive analog bias voltage to CMOS image sensor pixel arrays in compact action cameras. IC Role / Device Role / Timing Role: Low-noise 1.8 V source with 17 µVRMS output noise and 55 dB PSRR to preserve SNR in high-gain imaging paths. Use Value: Meets 12-bit ADC reference noise budget without additional filtering, avoiding latency penalties from RC post-regulation. |
Use Scenario: Regulating power for ARM Cortex-M0+ MCUs in battery-operated smart meter or environmental sensor gateways. IC Role / Device Role / Timing Role: Main 1.8 V supply with thermal shutdown and 230 mA current limit protecting against firmware lockup-induced overloads. Use Value: Integrated protection eliminates need for discrete thermal fuse or current-sense amplifier, reducing BoM by 3 components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | No active discharge; 2.5 µA IQ; 250 mA output; SOT-23-5 package (2.9 mm × 1.6 mm) | Better for ultra-low-IQ sleep modes but lacks fast VOUT discharge-requires external circuitry for safe power sequencing. | Select when lowest possible standby current dominates over board area and sequencing simplicity. |
| Torex XC6210B182MR-G | Capacitor-free; 1.8 V; 150 mA; 30 µA IQ; SOT-25 package; no active discharge | Smaller quiescent current than NCP140AMXD180TCG but lacks integrated discharge-needs external MOSFET for controlled ramp-down. | Choose when minimizing IQ is critical and board space permits adding discharge FET + gate driver. |
Compared with MCP1700T-1802E/TT and XC6210B182MR-G, the NCP140AMXD180TCG uniquely combines capacitor-free stability, active output discharge, and XDFN4 1.0 mm × 1.0 mm footprint-making it optimal for space-constrained, fast-sequencing portable systems where reliability and minimal external components are prioritized.
Availability
NCP140AMXD180TCG is available at Aetrix Electronics and suitable for smartphone power management, wearable sensor nodes, digital camera biasing, and IoT edge MCU applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP140AMXD180TCG 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 sensor solutions for automotive, industrial, and consumer markets.
The NCP140AMXD180TCG belongs to onsemi's capacitor-free LDO family, engineered specifically for ultra-compact, battery-powered devices demanding minimal footprint, low leakage, and robust power sequencing without external passive components.
FAQ
What is the output voltage tolerance of the NCP140AMXD180TCG over temperature?
The NCP140AMXD180TCG maintains ±2% output voltage accuracy across −40°C to +85°C junction temperature. At 25°C, its tolerance tightens to ±1%, verified per onsemi's Electrical Characteristics table. This stability ensures reliable operation for 1.8 V logic interfaces even under thermal cycling in handheld devices.
Does the NCP140AMXD180TCG require input or output capacitors to operate?
No-the NCP140AMXD180TCG is explicitly designed for capacitor-free operation and remains stable with zero input or output capacitance. External capacitors (e.g., 470 nF ceramic) may be added solely to improve PSRR or load transient response, but they are not required for basic regulation or stability.
What is the purpose of the exposed pad (EPAD) on the NCP140AMXD180TCG package?
The EPAD on the NCP140AMXD180TCG must be soldered directly to the PCB's GND plane using multiple thermal vias. It serves as the primary thermal conduction path, lowering junction-to-ambient resistance to 265°C/W (XDFN4 1.0×1.0 mm) and preventing thermal shutdown during sustained 150 mA loads.
How does the active output discharge function work in the NCP140AMXD180TCG?
When the EN pin is driven below 0.4 V, the NCP140AMXD180TCG disables regulation and activates an internal 100 Ω pull-down between OUT and GND. This discharges the output node rapidly-critical for preventing back-powering or undefined states in multi-rail systems during power-down sequences.
Can the NCP140AMXD180TCG be used with input voltages below 1.8 V?
No-the NCP140AMXD180TCG requires minimum 1.6 V input, but dropout voltage rises sharply below VOUT + VDO. At 150 mA, VDO is 255 mV min, so VIN must stay ≥2.055 V to maintain regulation. Operation below 2.0 V risks unregulated output and should be avoided in design.
NCP140AMXD180TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 150mA
- 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 (1x1)
NCP140AMXD180TCG FAQ
1.How can I place an order for NCP140AMXD180TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP140AMXD180TCG 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 NCP140AMXD180TCG reliable?
The price and inventory of NCP140AMXD180TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP140AMXD180TCG is usually 5 days.
3.What payment methods are accepted for NCP140AMXD180TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP140AMXD180TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP140AMXD180TCG?
NCP140AMXD180TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP140AMXD180TCG 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 NCP140AMXD180TCG?
For technical support, including NCP140AMXD180TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP140AMXD180TCG requirements.
6.How does Aetrix verify that NCP140AMXD180TCG is sourced from the original manufacturer or authorized distributors?
All NCP140AMXD180TCG 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 NCP140AMXD180TCG meets industry standards.
7.What is the process for return or replacement of NCP140AMXD180TCG?
All NCP140AMXD180TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP140AMXD180TCG, 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 NCP140AMXD180TCG part is unused and in its original packaging.
Return procedure for NCP140AMXD180TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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