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onsemi NCP4682HMU18TCG
- Part No.:
- NCP4682HMU18TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4682HMU18TCG.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,351
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Product details
Overview
NCP4682HMU18TCG from onsemi is a 150 mA CMOS low-dropout linear voltage regulator with 1.8 V fixed output, ±0.8% output voltage accuracy, 0.24 V dropout at 150 mA (VOUT = 2.8 V), and ultra-low 1.0 µA quiescent current. It features active-high Chip Enable (CE) control and is designed for power-sensitive applications such as battery-powered sensors and portable IoT peripherals.
For engineers reviewing the NCP4682HMU18TCG datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in the official ON Semiconductor NCP4682/D Rev. 3 datasheet.
Technical Context
The NCP4682HMU18TCG implements a CMOS-based LDO architecture with integrated fold-back current limiting and CE-controlled enable/disable sequencing. Its internal reference and error amplifier deliver ±40 ppm/°C temperature coefficient and 0.02%/V line regulation, enabling stable operation across input voltages from 1.70 V to 5.25 V.
Designed specifically for the 1.8 V output variant with high-threshold CE logic (VCEH = 1.5 V), it supports ceramic output capacitors ≥0.1 µF and achieves 30 dB PSRR at 1 kHz. Unlike the auto-discharge NCP4682D variants, the "H" suffix denotes CE-enabled operation without output discharge transistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±0.8% over −40°C to +85°C - ensures precise core supply for 1.8 V logic and memory interfaces. |
| Dropout Voltage | 0.28 V (typ.) at 150 mA - enables regulation from 2.08 V input, critical for single-cell Li-ion or coin-cell systems. |
| Quiescent Current | 1.0 µA (typ.) - extends battery life in always-on sensor nodes and wearable devices. |
| Standby Current | 0.1 µA (typ.) with CE = 0 V - reduces system leakage during deep-sleep modes. |
| PSRR | 30 dB at 1 kHz - suppresses ripple from noisy DC-DC pre-regulators feeding the LDO input. |
| Thermal Resistance | RJA = 250 °C/W (UDFN4 1.0×1.0 mm) - requires minimal PCB copper area for thermal management at full load. |
| Stability | Guaranteed with ≥0.1 µF ceramic output capacitor - eliminates need for tantalum or electrolytic components. |
Pinout & Package
Package: UDFN4 1.0 × 1.0 mm, 0.65 mm pitch, Pb-free, exposed thermal pad (connected to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.8 V output - connects directly to load; requires local 0.1 µF ceramic decoupling. |
| 2 | GND | Ground reference and thermal path - must be connected to PCB ground plane via exposed pad. |
| 3 | CE | Active-high chip enable - drives high (>1.5 V) to activate regulator; pulled low (<0.3 V) disables output. |
| 4 | VIN | Input supply (1.70–5.25 V) - requires 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0 µA typical - enables >1-year battery life in 10 µA average-current IoT endpoints. |
| High-accuracy output | ±0.8% initial tolerance and ±40 ppm/°C drift - meets tight margin requirements for 1.8 V FPGA I/O and MCU cores. |
| Low dropout at full load | 0.28 V @ 150 mA - sustains regulation down to 2.08 V input, compatible with aging primary cells. |
| CE-controlled sequencing | Active-high logic with 1.5 V threshold - simplifies interface to 1.8 V or 3.3 V GPIOs without level-shifting. |
| Robust protection | Fold-back current limit and thermal shutdown - prevents damage during short-circuit or overload events. |
Applications
| Battery-Powered Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Compact environmental sensor node powered by CR2032 coin cell, operating intermittently for temperature/humidity logging. IC Role / Device Role / Timing Role: Primary 1.8 V supply for ultra-low-power microcontroller and digital sensor interface. Use Value: 0.1 µA standby current extends battery life beyond 2 years; 1.8 V accuracy ensures ADC reference stability. |
Use Scenario: Optical heart-rate monitor with photodiode array and analog front-end, worn continuously for 7-day tracking. IC Role / Device Role / Timing Role: Clean 1.8 V rail for analog signal chain and BLE SoC I/O domain. Use Value: 30 dB PSRR at 1 kHz rejects switching noise from on-board DC-DC converter; ceramic-capacitor stability reduces BOM count. |
| Industrial Wireless Transceivers | Smart Home Edge Controllers |
Use Scenario: LoRaWAN end-node deployed in remote locations, powered by AA alkaline batteries with 5-year target lifetime. IC Role / Device Role / Timing Role: Regulated 1.8 V supply for sub-GHz transceiver and secure element. Use Value: 0.28 V dropout allows operation until battery voltage drops to 2.08 V; CE pin enables synchronized wake-up with MCU. |
Use Scenario: Zigbee coordinator module embedded in smart thermostat, requiring reliable 1.8 V for RF and touch controller. IC Role / Device Role / Timing Role: Secondary LDO supplying 1.8 V I/O rails downstream of main 3.3 V PMIC. Use Value: ±0.8% output accuracy maintains timing margin for high-speed SPI communication; UDFN4 footprint saves space on dense PCBs. |
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 | 150 mA, 1.8 V, 1.6 µA IQ, no CE pin - uses EN pin with 0.4 V threshold. | Lacks active-high CE compatibility; requires external pull-up for 1.8 V logic control. | Select when CE functionality is unnecessary and lowest possible IQ is prioritized over control interface. |
| Torex XC6206P182MR-G | 150 mA, 1.8 V, 1.0 µA IQ, CE pin with 0.7 V threshold - not compatible with 1.8 V GPIO drive. | Requires level-shifter for CE control from 1.8 V MCU; lower PSRR (25 dB @ 1 kHz). | Choose only if footprint compatibility with existing XC6206 designs is mandatory and CE voltage threshold can be met. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP4682HMU18TCG uniquely combines 1.0 µA quiescent current, 1.5 V CE threshold, and guaranteed 0.28 V dropout - making it optimal for space-constrained, battery-operated systems requiring direct 1.8 V GPIO control and long service life.
Availability
NCP4682HMU18TCG is available at Aetrix Electronics and suitable for battery-powered sensors, wearable health monitors, and industrial wireless transceivers requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for NCP4682HMU18TCG 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 delivering energy-efficient power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP4682HMU18TCG belongs to onsemi's precision LDO family engineered for ultra-low-power, high-accuracy regulation in portable and edge-connected devices - emphasizing extended battery life, small form factor, and robust transient response.
FAQ
What is the minimum input voltage required for NCP4682HMU18TCG to maintain regulation at full 150 mA load?
The NCP4682HMU18TCG requires a minimum input voltage of 2.08 V to sustain 1.8 V output at 150 mA, based on its typical 0.28 V dropout voltage. At higher temperatures or worst-case process corners, the dropout may reach 0.32 V, so 2.1 V input is recommended for margin. This enables operation from partially discharged single-cell Li-ion or alkaline sources.
Does NCP4682HMU18TCG include an output discharge function?
No, the NCP4682HMU18TCG does not include an output discharge transistor. The "H" suffix indicates high-threshold CE enable functionality only; output discharge is exclusive to "D" suffix variants like NCP4682DMU18TCG. When disabled, the output remains floating and discharges through the load or external circuitry.
Can NCP4682HMU18TCG operate with a 0.047 µF ceramic output capacitor?
No - the NCP4682HMU18TCG requires a minimum of 0.1 µF ceramic output capacitance for guaranteed stability, as specified in the datasheet. Using 0.047 µF risks oscillation or poor transient response. Always place the capacitor within 2 mm of VOUT and GND pins with low-inductance layout.
What is the maximum junction temperature rating for NCP4682HMU18TCG in UDFN4 package?
The absolute maximum junction temperature for NCP4682HMU18TCG is +150°C, per the Absolute Maximum Ratings table. However, continuous operation above +125°C is not recommended. With RJA = 250 °C/W and 150 mA load at 2.5 V input, power dissipation is ~105 mW, resulting in ~26°C rise above ambient - well within safe limits on standard FR-4 with minimal copper.
Is NCP4682HMU18TCG pin-compatible with other NCP4682 variants in UDFN4 package?
Yes - all UDFN4-packaged NCP4682 variants (e.g., NCP4682DMU18TCG, NCP4682HMU28TCG) share identical 4-pin pinout (VOUT, GND, CE/NC, VIN) and mechanical footprint. However, functional differences exist: "D" versions include auto-discharge; "H" versions feature CE-only control; and output voltage is fixed per part number - board-level compatibility requires matching voltage and CE/discharge requirements.
NCP4682HMU18TCG 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.65V @ 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)
NCP4682HMU18TCG FAQ
1.How can I place an order for NCP4682HMU18TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4682HMU18TCG 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 NCP4682HMU18TCG reliable?
The price and inventory of NCP4682HMU18TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4682HMU18TCG is usually 5 days.
3.What payment methods are accepted for NCP4682HMU18TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4682HMU18TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4682HMU18TCG?
NCP4682HMU18TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4682HMU18TCG 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 NCP4682HMU18TCG?
For technical support, including NCP4682HMU18TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4682HMU18TCG requirements.
6.How does Aetrix verify that NCP4682HMU18TCG is sourced from the original manufacturer or authorized distributors?
All NCP4682HMU18TCG 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 NCP4682HMU18TCG meets industry standards.
7.What is the process for return or replacement of NCP4682HMU18TCG?
All NCP4682HMU18TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4682HMU18TCG, 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 NCP4682HMU18TCG part is unused and in its original packaging.
Return procedure for NCP4682HMU18TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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