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onsemi NCP4682DMU28TCG
- Part No.:
- NCP4682DMU28TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4682DMU28TCG.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,123
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Product details
Overview
NCP4682DMU28TCG from onsemi is a 150 mA CMOS low-dropout linear voltage regulator with 2.8 V fixed output, ±0.8% output voltage accuracy, 0.24 V dropout at 150 mA, and ultra-low 1.0 µA quiescent current. It features Chip Enable (active-high), current fold-back protection, and auto-discharge functionality-designed for power-sensitive battery-powered systems requiring stable low-noise supply.
For engineers reviewing the NCP4682DMU28TCG datasheet, pinout, applications, or equivalent options, key selection considerations include its UDFN4 1.0×1.0 mm package, 1.7–5.25 V input range, ±40 ppm/°C temperature coefficient, ceramic-capacitor stability (≥0.1 µF), and enable-controlled fast output discharge behavior.
Technical Context
The NCP4682DMU28TCG implements a CMOS-based LDO architecture with internal N-channel pass transistor and precision bandgap reference. Its enable logic drives an internal pull-down current source (0.3 µA) and activates a dedicated VOUT-to-GND discharge transistor during shutdown.
It operates across −40°C to +85°C ambient, supports 150 mA continuous load with fold-back current limiting (40 mA short-circuit limit), and maintains regulation with line regulation of 0.02%/V and load regulation ≤20 mV from 1 mA to 150 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±0.8% at 25°C; ensures precise biasing for 2.8 V logic rails and analog sensors |
| Dropout Voltage | 0.24 V at 150 mA (VOUT = 2.8 V); enables operation from 3.04 V input, critical for single-cell Li-ion or coin-cell systems |
| Quiescent Current | 1.0 µA typical (excluding CE pull-down); extends battery life in always-on IoT endpoints and wearables |
| Supply Voltage Range | 1.70 V to 5.25 V input; compatible with wide-range sources including 1.8 V, 3.3 V, and 5 V rails |
| Output Capacitor | Stable with ≥0.1 µF ceramic capacitor; eliminates need for high-ESR tantalum, reducing BOM cost and footprint |
| Thermal Resistance | RJA = 250 °C/W (UDFN4); requires minimal PCB copper area for thermal management in space-constrained designs |
| PSRR | 30 dB at 1 kHz (VIN = 3.8 V, VOUT = 2.8 V); suppresses switching noise from upstream DC-DC converters |
Pinout & Package
Package: UDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed thermal pad (GND-connected). Compact footprint ideal for wearable and portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output | Delivers stable 2.8 V; connects directly to load and output capacitor (≥0.1 µF) |
| GND | Ground reference | Common return path for input/output currents and thermal pad connection point |
| CE | Chip Enable (active-high) | Enables regulator when ≥1.5 V applied; pulls down at 0.3 µA when inactive |
| VIN | Input supply | Accepts 1.7–5.25 V; requires local 0.1 µF ceramic decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated Nch transistor discharges VOUT rapidly during disable, preventing residual voltage hold-up in sequencing-critical systems |
| Ultra-low quiescent current | 1.0 µA supply current enables >10-year battery life in 10 µA average-load applications (e.g., BLE sensors) |
| High PSRR & low noise | 30 dB PSRR at 1 kHz and 70 µVrms output noise support clean power for RF and ADC subsystems |
| ±40 ppm/°C tempco | Ensures <±2.4 mV drift over −40°C to +85°C, meeting tight analog sensor bias requirements |
| Current fold-back protection | Reduces output current and voltage under overload/short, limiting power dissipation and enabling self-recovery |
Applications
| Battery-Powered IoT Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Continuous ECG/PPG sensing in wrist-worn devices powered by CR2032 or rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Primary 2.8 V supply for analog front-end and BLE SoC; enabled/disabled via host MCU GPIO. Use Value: 1.0 µA quiescent current extends battery runtime; auto-discharge prevents false wake-ups during sleep mode transitions. | Use Scenario: Compact fitness tracker with optical heart-rate sensor and motion co-processor. IC Role / Device Role / Timing Role: Low-noise 2.8 V rail for photodiode amplifier and ADC; CE synchronized with sensor acquisition bursts. Use Value: 70 µVrms output noise minimizes signal quantization error; ±0.8% accuracy ensures consistent sensor calibration across units. |
| Smart Home Peripherals | Industrial Wireless Nodes |
Use Scenario: Battery-operated Zigbee/Z-Wave door/window sensors with multi-year deployment requirement. IC Role / Device Role / Timing Role: Standby power regulator for microcontroller and RF transceiver; CE driven by wake-on-interrupt logic. Use Value: 0.1 µA standby current (with CE = 0 V) enables >5-year shelf life; 0.24 V dropout allows use with aging alkaline cells down to 2.9 V. | Use Scenario: Remote vibration monitoring node in factory environments using LoRaWAN and MEMS accelerometers. IC Role / Device Role / Timing Role: Precision 2.8 V reference for 24-bit sigma-delta ADC and low-jitter clock buffer. Use Value: ±40 ppm/°C tempco maintains <±0.02% gain drift over industrial temperature range; stable with 0.1 µF X7R ceramics simplifies layout. |
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 | 250 mA output, 1.6 µA IQ, no CE pin or auto-discharge | Lacks enable control and fast discharge; suitable only for always-on applications | Choose when higher current headroom is needed and enable sequencing is unnecessary |
| TCS2117-2800MV | 150 mA, 0.9 µA IQ, CE pin but no auto-discharge; 0.35 V dropout at 150 mA | Higher dropout limits use with low-VIN sources; missing discharge transistor increases system-level sequencing complexity | Select when lowest possible IQ is critical and external discharge circuitry is acceptable |
Compared with MCP1700T-2802E/TT and TCS2117-2800MV, the NCP4682DMU28TCG uniquely combines ultra-low IQ, active-high CE, and integrated auto-discharge in a 1.0×1.0 mm UDFN-enabling compact, long-life, and sequenced power architectures without external components.
Availability
NCP4682DMU28TCG is available at Aetrix Electronics and suitable for battery-powered IoT sensors, wearable health monitors, and smart home peripherals requiring stable component supply with guaranteed long-term availability.
Supply support for NCP4682DMU28TCG 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 manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and consumer markets.
The NCP4682 series belongs to onsemi's ultra-low-IQ LDO portfolio, engineered specifically for extended-battery-life portable electronics where sub-µA quiescent current, small footprint, and integrated enable/discharge functionality are mandatory.
FAQ
What is the maximum input voltage rating for the NCP4682DMU28TCG?
The absolute maximum input voltage for the NCP4682DMU28TCG is 6.0 V. However, per the datasheet's Note 3, continuous operation above 5.25 V is limited to total cumulative time ≤500 hours at up to 5.50 V. For reliable long-term operation, the recommended maximum input is 5.25 V - ensuring compliance with electrical characteristics and thermal limits across the full temperature range.
Does the NCP4682DMU28TCG require an external pull-up resistor on the CE pin?
No, the NCP4682DMU28TCG does not require an external pull-up resistor on the CE pin. It includes an internal pull-down current source (0.3 µA typical) that holds CE at logic low when unconnected. To enable the regulator, apply ≥1.5 V to CE; to disable, drive CE ≤0.3 V or leave it floating (internal pull-down ensures reliable disable state).
How does the auto-discharge feature of the NCP4682DMU28TCG operate?
The NCP4682DMU28TCG integrates a dedicated N-channel transistor between VOUT and GND that activates automatically when CE is driven low. This transistor provides a controlled discharge path, reducing VOUT from 2.8 V to <0.1 V within microseconds - eliminating residual voltage that could interfere with system reset sequencing or cause unintended peripheral wake-up in battery-powered applications.
Can the NCP4682DMU28TCG be used with tantalum output capacitors?
No - the NCP4682DMU28TCG is optimized for ceramic output capacitors ≥0.1 µF. Using tantalum capacitors is not recommended because their higher ESR can destabilize the control loop and cause oscillation, as explicitly warned in the Application Information section. Ceramic capacitors (X5R/X7R) ensure guaranteed stability, transient response, and minimal board area.
What is the thermal performance of the NCP4682DMU28TCG in its UDFN4 package?
The NCP4682DMU28TCG in UDFN4 package has a junction-to-air thermal resistance (RJA) of 250 °C/W. At 150 mA load with 3.8 V input (150 mW dissipation), this yields ~37.5 °C junction rise above ambient. With proper PCB copper pour under the exposed thermal pad, actual temperature rise is typically reduced by 30–50%, supporting reliable operation up to +85°C ambient without derating.
NCP4682DMU28TCG 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1.5 µA
- Current - Supply (Max):
- -
- PSRR:
- 30dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-UDFN (1.0x1.0)
NCP4682DMU28TCG FAQ
1.How can I place an order for NCP4682DMU28TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4682DMU28TCG 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 NCP4682DMU28TCG reliable?
The price and inventory of NCP4682DMU28TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4682DMU28TCG is usually 5 days.
3.What payment methods are accepted for NCP4682DMU28TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4682DMU28TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4682DMU28TCG?
NCP4682DMU28TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4682DMU28TCG 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 NCP4682DMU28TCG?
For technical support, including NCP4682DMU28TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4682DMU28TCG requirements.
6.How does Aetrix verify that NCP4682DMU28TCG is sourced from the original manufacturer or authorized distributors?
All NCP4682DMU28TCG 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 NCP4682DMU28TCG meets industry standards.
7.What is the process for return or replacement of NCP4682DMU28TCG?
All NCP4682DMU28TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4682DMU28TCG, 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 NCP4682DMU28TCG part is unused and in its original packaging.
Return procedure for NCP4682DMU28TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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