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onsemi NCP4683DMU31TCG
- Part No.:
- NCP4683DMU31TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4683DMU31TCG.pdf
- Description:
- IC REG LINEAR 3.1V 300MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,618
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Product details
Overview
NCP4683DMU31TCG from onsemi is a 300 mA CMOS low-dropout linear voltage regulator with fixed 3.1 V output, ±1.0% accuracy (VOUT > 2.0 V), 0.25 V dropout at 300 mA, and chip-enable control. It operates from 1.40 V to 5.25 V input, supports ceramic output capacitors ≥1.0 µF, and delivers stable power for space-constrained portable electronics.
For engineers reviewing the NCP4683DMU31TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its UDFN4 1.0×1.0 mm package, auto-discharge capability (D-version), high PSRR (70 dB @ 1 kHz), and thermal performance in battery-powered systems requiring fast transient response and low quiescent current.
Technical Context
The NCP4683DMU31TCG implements a CMOS-based LDO architecture with fold-back current limiting and an integrated N-channel pass transistor. Its enable logic is active-high, with CE threshold of 1.0 V (VCEH) and internal pull-down current (0.3 µA), enabling precise system-level power sequencing.
Thermal design is constrained by RJA = 250 °C/W in the UDFN4 package; the device includes output discharge via an internal VOUT-to-GND transistor (D-version feature), reducing residual voltage during shutdown-critical for multi-rail systems requiring controlled power-down timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1 V, ±1.0% accuracy over temperature (−40°C to +85°C) ensures stable MCU core or interface rail operation. |
| Max Output Current | 300 mA continuous; supports moderate-power peripherals like sensors, RF transceivers, or display drivers without external heatsinking. |
| Dropout Voltage | 0.25 V at 300 mA (VOUT = 2.8 V); enables efficient regulation from single-cell Li-ion (3.0–3.6 V) or 3.3 V supply rails. |
| PSRR | 70 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters, preserving signal integrity in analog/RF sections. |
| Quiescent Current | 50 µA typical; minimizes standby power loss in always-on battery applications such as IoT edge nodes or wearables. |
| Enable Threshold | VCEH = 1.0 V; compatible with 1.8 V or 3.3 V GPIOs for clean, low-voltage enable signaling without level-shifting. |
| Stability | Stable with ≥1.0 µF ceramic output capacitor; eliminates need for costly tantalum or polymer caps, reducing BOM cost and footprint. |
Pinout & Package
Package: UDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed thermal pad connected to GND (Case 517BR). The tab must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output | Delivers fixed 3.1 V to load; requires local 1.0 µF ceramic decoupling placed adjacent to pin. |
| GND (Pin 2) | Ground reference | Common return path for input/output currents and CE logic; connects to exposed thermal pad. |
| CE (Pin 3) | Chip enable input | Active-high control: drives IC into low-IQ standby (<1.0 µA) when pulled low; internal 0.3 µA pull-down aids floating-pin safety. |
| VIN (Pin 4) | Input supply | Accepts 1.40–5.25 V; requires 1.0 µF ceramic input capacitor near pin to suppress line transients. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | D-version integrates VOUT-to-GND discharge transistor, clearing output capacitance within microseconds during disable-prevents unintended wake-up or latch-up in multi-supply systems. |
| Ultra-low quiescent current | 50 µA typical operating current enables >1-year battery life in coin-cell-powered devices drawing <10 µA average system current. |
| High PSRR across frequency | 70 dB @ 1 kHz and >65 dB up to 100 kHz maintains clean analog/RF supply rails despite noisy DC-DC switching sources. |
| Ceramic-capacitor stability | No ESR requirements: works with standard 1.0 µF X5R/X7R ceramics, eliminating need for specialized low-ESR capacitors and simplifying layout. |
| Fold-back current protection | Reduces output current and voltage under overload, limiting power dissipation and preventing thermal runaway during short-circuit events. |
Applications
| Battery-Powered IoT Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Compact wearable sensor node powered by CR2032 or LiPo cell, running BLE MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 3.1 V supply for MCU core and ADC reference, enabled/disabled synchronously with radio activity. Use Value: 50 µA IQ extends battery life; auto-discharge prevents back-powering of disabled subsystems during sleep mode. |
Use Scenario: Handheld pulse oximeter with optical sensor, analog signal chain, and LCD display. IC Role / Device Role / Timing Role: Clean 3.1 V rail for precision analog circuitry and display driver, sequenced via microcontroller GPIO. Use Value: 70 dB PSRR rejects noise from display backlight switching; ±1.0% output accuracy ensures consistent ADC reference voltage. |
| Home Appliance Control Panels | Networked Security Cameras |
Use Scenario: Smart thermostat or washing machine UI board with touch controller, LED indicators, and wireless module. IC Role / Device Role / Timing Role: Secondary regulated rail derived from 5 V main supply, powering low-voltage logic and interface ICs. Use Value: 0.25 V dropout allows operation down to 3.35 V input-maintains regulation during brown-out conditions on shared 5 V bus. |
Use Scenario: Indoor IP camera with image sensor, video processor, and Wi-Fi SoC, powered via PoE or USB. IC Role / Device Role / Timing Role: Dedicated 3.1 V supply for image sensor bias and analog video processing block. Use Value: Fast line/load transient response (per Figures 35–42) preserves image quality during sudden current surges from sensor readout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3102E/TT | 300 mA, 3.1 V, 6 µA IQ, no CE pin, SOT-23 package | Lacks enable control and auto-discharge; smaller thermal mass limits sustained 300 mA output in compact layouts. | Choose when ultra-low standby current is critical and enable sequencing is handled externally. |
| Torex XC6206P312MR-G | 300 mA, 3.1 V, ±2.0% accuracy, 15 µA IQ, no auto-discharge, SOT-25 | Lower accuracy and no VOUT discharge; higher dropout (0.35 V @ 300 mA) reduces usable input range. | Choose for cost-sensitive designs where ±2.0% tolerance and absence of discharge are acceptable. |
Compared with MCP1700T-3102E/TT and XC6206P312MR-G, the NCP4683DMU31TCG provides tighter output accuracy, integrated enable functionality, and auto-discharge-making it superior for battery-powered systems requiring precise rail control, fast power-down, and robust transient immunity.
Availability
NCP4683DMU31TCG is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical monitors, and home appliance control panels requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP4683DMU31TCG 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, and consumer markets.
The NCP4683DMU31TCG belongs to onsemi's NCP4683 family of low-noise, low-IQ LDO regulators designed specifically for space-constrained, battery-operated portable electronics demanding high accuracy, fast transient response, and reliable enable-controlled power sequencing.
FAQ
What is the output voltage tolerance of the NCP4683DMU31TCG over temperature?
The NCP4683DMU31TCG has ±1.0% output voltage accuracy for VOUT > 2.0 V across −40°C to +85°C ambient temperature. At 25°C, accuracy tightens to ±1.0% (±0.031 V for 3.1 V), and the temperature coefficient is ±80 ppm/°C-ensuring stable 3.1 V rail performance in consumer and industrial environments where the NCP4683DMU31TCG is deployed.
Does the NCP4683DMU31TCG require an external resistor network to set output voltage?
No. The NCP4683DMU31TCG is a fixed-output regulator with factory-trimmed 3.1 V output. It does not use external feedback resistors. This simplifies design, eliminates resistor tolerance errors, and reduces PCB area-key advantages for compact applications where the NCP4683DMU31TCG is used as a drop-in power solution.
How does the auto-discharge feature of the NCP4683DMU31TCG operate?
The NCP4683DMU31TCG (D-version) integrates an internal N-channel transistor between VOUT and GND. When the CE pin is driven low, this transistor activates, discharging the output capacitor rapidly-typically within tens of microseconds. This prevents residual voltage from interfering with downstream logic states or causing unintended wake-up, a critical behavior in systems using the NCP4683DMU31TCG for sequenced power domains.
Can the NCP4683DMU31TCG be used with a 1.0 µF ceramic capacitor on the output?
Yes. The NCP4683DMU31TCG is explicitly characterized and guaranteed stable with ≥1.0 µF ceramic output capacitors (X5R/X7R), with no minimum ESR requirement. This eliminates the need for larger or more expensive tantalum/polymer capacitors-reducing cost and footprint while maintaining stability, as confirmed in the NCP4683DMU31TCG datasheet's Application Information section.
What is the maximum input voltage rating for the NCP4683DMU31TCG?
The absolute maximum input voltage for the NCP4683DMU31TCG is 6.0 V. However, the recommended operating input voltage range is 1.40 V to 5.25 V per the Electrical Characteristics table. Exceeding 5.25 V may degrade long-term reliability or violate safe operating area limits-even if below the 6.0 V absolute max-so designs using the NCP4683DMU31TCG should stay within the specified operational range.
NCP4683DMU31TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-UDFN (1.0x1.0)
NCP4683DMU31TCG FAQ
1.How can I place an order for NCP4683DMU31TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4683DMU31TCG 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 NCP4683DMU31TCG reliable?
The price and inventory of NCP4683DMU31TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4683DMU31TCG is usually 5 days.
3.What payment methods are accepted for NCP4683DMU31TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4683DMU31TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4683DMU31TCG?
NCP4683DMU31TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4683DMU31TCG 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 NCP4683DMU31TCG?
For technical support, including NCP4683DMU31TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4683DMU31TCG requirements.
6.How does Aetrix verify that NCP4683DMU31TCG is sourced from the original manufacturer or authorized distributors?
All NCP4683DMU31TCG 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 NCP4683DMU31TCG meets industry standards.
7.What is the process for return or replacement of NCP4683DMU31TCG?
All NCP4683DMU31TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4683DMU31TCG, 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 NCP4683DMU31TCG part is unused and in its original packaging.
Return procedure for NCP4683DMU31TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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