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onsemi NCP140AMXD300TCG
- Part No.:
- NCP140AMXD300TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP140AMXD300TCG.pdf
- Description:
- IC REG LINEAR 3V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,575
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Product details
Overview
NCP140AMXD300TCG from onsemi is a 150 mA capacitor-free, low-noise LDO voltage regulator with fixed 3.0 V output, ±1% accuracy at 25°C, 125 mV dropout at 150 mA (for 3.3 V variant; 3.0 V dropout is 135 mV per datasheet Fig.13), and ultra-low 45 µA quiescent current - designed for space-constrained battery-powered systems including smartphones and wearable sensors.
For engineers reviewing the NCP140AMXD300TCG datasheet, pinout, applications, or equivalent options, key selection criteria include capacitor-free stability, active output discharge capability (A-series), thermal shutdown at 160°C, XDFN4 1.0 mm × 1.0 mm package constraints, and PSRR of 55 dB at 1 kHz.
Technical Context
The NCP140AMXD300TCG integrates a PMOS pass transistor with internal bandgap reference, soft-start circuitry, and enable-controlled active discharge (via 100 Ω pull-down). Its capless architecture eliminates mandatory external capacitors while maintaining stability across ceramic, tantalum, and electrolytic types - enabling minimal BOM count in ultra-thin portable designs.
It operates across 1.6 V to 5.5 V input, delivers regulated 3.0 V output, and features integrated thermal shutdown (160°C trip, 20°C hysteresis), current limiting (230 mA typ.), and short-circuit protection (250 mA). The EN pin asserts high (>0.9 V) for regulation and low (<0.4 V) for shutdown with sub-1 µA standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V - eliminates need for external feedback resistors; supports direct powering of 3.0 V logic rails. |
| Output Current | 150 mA continuous - sufficient for RF transceivers, sensor interfaces, and MCU core supplies in compact devices. |
| Dropout Voltage | 135 mV at 150 mA (TJ = 25°C, VOUT = 3.0 V) - enables operation from single-cell Li-ion (3.0 V min) or 3.3 V rail with margin. |
| Quiescent Current | 45 µA typical - extends battery life in always-on wearables and IoT endpoints where sleep-mode current dominates runtime. |
| PSRR | 55 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for analog/RF subsystems. |
| Accuracy | ±1% at 25°C, ±2% over −40°C to +85°C - ensures reliable logic-level compliance and ADC reference stability without calibration. |
| Enable Threshold | VENH = 0.9 V, VENL = 0.4 V - compatible with 1.8 V and 3.3 V GPIOs; internal 100 nA pull-down guarantees default-off state. |
Pinout & Package
XDFN4 package (Case 711AJ), 1.0 mm × 1.0 mm × 0.4 mm, with exposed thermal pad requiring direct connection to GND plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 3.0 V; optional small ceramic capacitor improves load transient response but not required for stability. |
| 2 - GND | Ground reference | Common return path for input, output, and enable; must be tied to large copper pour for thermal dissipation. |
| 3 - EN | Enable control | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables output and activates active discharge (100 Ω to GND). |
| 4 - IN | Input supply | Accepts 1.6–5.5 V; body diode prevents reverse current if VOUT > VIN, but external protection recommended in such cases. |
| EPAD | Exposed thermal pad | Must be soldered to GND plane with multiple vias - reduces RθJA to 265°C/W and enables 300 mW max power dissipation at 25°C ambient. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable with zero external capacitors - eliminates footprint, cost, and aging concerns in miniaturized consumer electronics. |
| Active output discharge | 100 Ω internal pull-down activated during disable - ensures rapid VOUT decay to prevent latch-up in multi-rail systems. |
| Ultra-low quiescent current | 45 µA typical - enables >1-year battery life in coin-cell-powered BLE sensors with 10 µA average system current. |
| High PSRR at low frequency | 55 dB @ 1 kHz - rejects ripple from upstream buck converters, preserving signal integrity in audio and precision analog stages. |
| Thermal shutdown with hysteresis | 160°C trip / 140°C reset - protects against sustained overload or poor PCB layout without oscillatory shutdown behavior. |
Applications
| Smartphone Power Rail | Wearable Sensor Node |
|---|---|
Use Scenario: Supplying 3.0 V to camera ISP and image sensor interface in slim smartphone bezel modules. IC Role / Device Role / Timing Role: Primary low-noise post-regulator for analog front-end, replacing bulkier capacitor-dependent LDOs. Use Value: Capable of stable regulation without output capacitor - saves 0.5 mm² board area and eliminates capacitor aging drift affecting image quality. |
Use Scenario: Powering ultra-low-power environmental sensor (temperature/humidity) in wrist-worn fitness tracker. IC Role / Device Role / Timing Role: Always-on supply for sensor wake-up circuitry and BLE radio during deep-sleep cycles. Use Value: 45 µA quiescent current and active discharge ensure <1 µA system leakage when disabled - extending CR2032 battery life beyond 18 months. |
| Industrial Handheld Scanner | Medical Patch Monitor |
Use Scenario: Providing clean 3.0 V bias to laser diode driver and CMOS image sensor in battery-operated barcode scanner. IC Role / Device Role / Timing Role: Noise-sensitive analog supply isolated from noisy digital processor domain. Use Value: 55 dB PSRR at 1 kHz suppresses 2 MHz switching noise from main DC-DC, preventing image artifacts in scanned barcodes. |
Use Scenario: Regulating 3.0 V for ECG analog front-end and low-power microcontroller in disposable wireless patch monitor. IC Role / Device Role / Timing Role: Safety-critical regulated supply with thermal fault protection and fast output discharge on shutdown. Use Value: Thermal shutdown at 160°C and active discharge prevent patient skin heating and ensure safe power-down during electrode detachment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/TT | 300 mA rating, 2 µA quiescent current, no active discharge, SOT-23-5 package (2.9 mm × 1.6 mm) | Larger footprint; lacks capless stability and thermal shutdown hysteresis; better for ultra-low-IQ but higher IOUT needs | Select when >150 mA load or sub-µA IQ is critical, and board space allows SOT-23. |
| Torex XC6210B302MR-G | 150 mA, 1.0 µA IQ, no active discharge, USP-4 package (1.2 mm × 1.6 mm), requires 1 µF output cap | Higher minimum output capacitance requirement; larger package; lower IQ but no discharge function | Choose for lowest possible quiescent current where capless operation is not mandatory and active discharge is unnecessary. |
Compared with MCP1700T-3002E/TT and XC6210B302MR-G, the NCP140AMXD300TCG uniquely combines capacitor-free stability, active output discharge, and industry-standard XDFN4 1.0×1.0 mm size - making it optimal for next-gen wearables where board area, fast power sequencing, and reliability under capacitor aging are design priorities.
Availability
NCP140AMXD300TCG is available at Aetrix Electronics and suitable for smartphone power management, wearable sensor nodes, industrial handheld scanners, and medical patch monitors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCP140AMXD300TCG 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP140AMXD300TCG belongs to onsemi's NCP140 family of capacitor-free LDOs, engineered specifically for ultra-compact, battery-powered portable electronics where minimal footprint, low noise, and robust power sequencing are essential.
FAQ
What is the output voltage tolerance of the NCP140AMXD300TCG over temperature?
The NCP140AMXD300TCG maintains ±2% output voltage accuracy across the full operating junction temperature range of −40°C to +85°C. At 25°C, the tolerance tightens to ±1%, as confirmed in the Electrical Characteristics table (page 3 of datasheet). This ensures reliable operation for 3.0 V logic interfaces without external trimming.
Does the NCP140AMXD300TCG require input or output capacitors to operate stably?
No - the NCP140AMXD300TCG is explicitly designed for capacitor-free operation and remains stable with or without input/output capacitors. External capacitors (e.g., 1 µF ceramic) may be added to improve PSRR or load transient response, but they are not required for basic regulation or stability per datasheet Figure 1 and Applications Information section.
What is the thermal resistance (RθJA) of the NCP140AMXD300TCG in its XDFN4 1.0 mm × 1.0 mm package?
The NCP140AMXD300TCG in Case 711AJ (XDFN4 1.0×1.0 mm) has a specified RθJA of 265°C/W when mounted on a JEDEC-standard test board (page 2 of datasheet). Actual performance improves significantly with increased PCB copper area and thermal vias to GND - e.g., 2 oz Cu with 200 mm² pad reduces RθJA to ~40°C/W (Figure 44).
How does the active output discharge function work on the NCP140AMXD300TCG?
When the EN pin is driven below 0.4 V, the NCP140AMXD300TCG 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 latch-up in multi-rail systems. This feature is exclusive to "A"-suffix variants like the NCP140AMXD300TCG.
What is the maximum input voltage the NCP140AMXD300TCG can tolerate?
The absolute maximum input voltage for the NCP140AMXD300TCG is 6 V, as stated in the Absolute Maximum Ratings table (page 2). For reliable operation, the recommended input range is 1.6 V to 5.5 V. Exceeding 6 V risks permanent damage, even momentarily.
NCP140AMXD300TCG 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):
- 3V
- 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 (1x1)
NCP140AMXD300TCG FAQ
1.How can I place an order for NCP140AMXD300TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP140AMXD300TCG 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 NCP140AMXD300TCG reliable?
The price and inventory of NCP140AMXD300TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP140AMXD300TCG is usually 5 days.
3.What payment methods are accepted for NCP140AMXD300TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP140AMXD300TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP140AMXD300TCG?
NCP140AMXD300TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP140AMXD300TCG 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 NCP140AMXD300TCG?
For technical support, including NCP140AMXD300TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP140AMXD300TCG requirements.
6.How does Aetrix verify that NCP140AMXD300TCG is sourced from the original manufacturer or authorized distributors?
All NCP140AMXD300TCG 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 NCP140AMXD300TCG meets industry standards.
7.What is the process for return or replacement of NCP140AMXD300TCG?
All NCP140AMXD300TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP140AMXD300TCG, 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 NCP140AMXD300TCG part is unused and in its original packaging.
Return procedure for NCP140AMXD300TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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