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onsemi NCP4682DMU12TCG
- Part No.:
- NCP4682DMU12TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4682DMU12TCG.pdf
- Description:
- IC REG LINEAR 1.2V 150MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
NCP4682DMU12TCG from onsemi is a 150 mA, ultra-low-quiescent-current CMOS low-dropout linear regulator with 1.2 V fixed output, ±0.8% initial accuracy, and integrated chip enable (CE) for power gating. It operates from 1.70 V to 5.25 V input, delivers 0.24 V dropout at 150 mA (VOUT = 2.8 V), and supports ceramic output capacitors ≥0.1 µF - ideal for space-constrained battery-powered microcontroller core rails and sensor biasing.
For engineers reviewing the NCP4682DMU12TCG datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, UDFN4 package layout, CE-controlled shutdown behavior, auto-discharge functionality, and validated alternatives for portable electronics power design.
Technical Context
The NCP4682DMU12TCG implements a CMOS-based LDO architecture with fold-back current limiting and an internal N-channel pass transistor. Its CE pin (active-high) enables full shutdown with 0.1 µA standby current, while the D-suffix variant integrates an output discharge transistor that actively pulls VOUT to GND during disable, preventing floating rail conditions in multi-rail systems.
It achieves ±40 ppm/°C output voltage temperature coefficient and 30 dB PSRR at 1 kHz (VIN = 2.2 V, VOUT = 1.2 V), with stable operation across −40°C to +85°C ambient. The device is optimized for minimal board footprint using the 1.0 × 1.0 mm UDFN4 package with exposed thermal pad connected to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±0.8% (25°C); ensures precise core voltage for low-power MCUs and RF ICs without external feedback. |
| Max Output Current | 150 mA continuous; sufficient for powering Cortex-M0+/M3 cores, BLE SoCs, or multiple sensors simultaneously. |
| Quiescent Current | 1.0 µA typical (excl. CE pull-down); extends battery life in always-on IoT endpoints and wearables. |
| Dropout Voltage | 0.24 V @ 150 mA (VOUT = 2.8 V); enables regulation from single-cell Li-ion (3.0 V min) down to 1.2 V with margin. |
| Line Regulation | 0.02%/V typical; maintains tight output under varying battery voltage or upstream DC-DC ripple. |
| Thermal Resistance | RJA = 250°C/W (UDFN4); requires minimal PCB copper area for thermal management in compact layouts. |
| Stability | Stable with ≥0.1 µF ceramic output capacitor; eliminates need for tantalum or large electrolytics, reducing BOM cost and size. |
Pinout & Package
Package: UDFN4 (1.0 × 1.0 mm, 0.65 mm pitch), Pb-free, moisture-sensitive level 1 (MSL1). Exposed thermal pad (Tab) is internally connected to GND and must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output node | Delivers clean 1.2 V supply; connect 0.1 µF ceramic capacitor directly adjacent to minimize ESR-induced instability. |
| 2 (GND) | Ground reference and thermal path | Primary return for load current and IC bias; ties to exposed thermal pad for junction-to-board heat transfer. |
| 3 (CE) | Chip enable control input | Active-high logic interface (VCEH = 1.5 V min); drives into high-impedance state when unconnected; internal pull-down enables default-off behavior. |
| 4 (VIN) | Input supply connection | Accepts 1.70–5.25 V; requires local 0.1 µF ceramic decoupling placed within 2 mm of pin to suppress high-frequency noise. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-output discharge | Integrated N-ch discharge FET activates on CE deassertion, discharging VOUT capacitor in <1 ms - prevents back-powering or latch-up in sequenced power systems. |
| Ultra-low IQ | 1.0 µA typical quiescent current enables >10-year battery life in coin-cell-powered devices operating at µA average load. |
| High PSRR | 30 dB @ 1 kHz (1.2 V version); suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Current fold-back protection | Reduces output current and voltage during short-circuit events, limiting power dissipation and enabling safe recovery without thermal shutdown. |
| Wide input range | 1.70–5.25 V operation supports direct connection to Li-ion, Li-Po, or regulated 3.3 V/5 V rails without pre-regulation. |
Applications
| Wearable Sensor Node | BLE Microcontroller Core Rail |
|---|---|
|
Use Scenario: Powering an ultra-low-power inertial measurement unit (IMU) and BLE radio in a fitness tracker with CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.2 V core regulator for ARM Cortex-M0+ MCU and integrated accelerometer/gyroscope. Use Value: 1.0 µA quiescent current extends battery life to >2 years in sleep mode; auto-discharge prevents IMU leakage current from draining VOUT during deep sleep. |
Use Scenario: Supplying the digital core of a Bluetooth 5.0 SoC (e.g., nRF52840) in a smart home sensor hub. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering stable 1.2 V to CPU and radio subsystems. Use Value: 0.24 V dropout allows operation down to 1.44 V input, maximizing usable battery voltage range; 30 dB PSRR isolates RF section from digital supply noise. |
| Portable Medical Monitor | Industrial Wireless Sensor |
|
Use Scenario: Biasing analog front-end (AFE) and microcontroller in a handheld pulse oximeter powered by two AAA alkaline cells. IC Role / Device Role / Timing Role: Precision 1.2 V reference-grade supply for ADC reference and MCU core. Use Value: ±0.8% output accuracy and ±40 ppm/°C tempco ensure consistent ADC conversion across temperature; CE pin enables synchronized power cycling with measurement bursts. |
Use Scenario: Regulating power for LoRaWAN node with sub-GHz transceiver and environmental sensors in remote field deployment. IC Role / Device Role / Timing Role: Standby-mode LDO enabling rapid wake-from-sleep transitions via CE control. Use Value: 0.1 µA standby current minimizes self-discharge during 99.9% duty-cycle sleep; UDFN4 footprint saves PCB area for compact enclosure design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 1.2 V fixed, 250 mA, 1.6 µA IQ, no CE pin, SOT-23-3 package | Lacks enable and auto-discharge; requires external circuitry for controlled shutdown | Select when board space permits larger SOT-23 and CE functionality is unnecessary |
| Torex XC6206P122MR-G | 1.2 V fixed, 150 mA, 1.0 µA IQ, CE pin, SOT-25 package (5-pin) | Includes CE but no auto-discharge; higher RDS(on) yields 0.35 V dropout @ 150 mA | Choose when CE control is needed but output discharge is handled externally or not required |
Compared with MCP1700T-1202E/TT and XC6206P122MR-G, the NCP4682DMU12TCG uniquely combines ultra-low IQ, integrated CE, and active output discharge in a 1.0 × 1.0 mm UDFN4 package - making it optimal for miniaturized, battery-sensitive designs requiring clean power sequencing.
Availability
NCP4682DMU12TCG is available at Aetrix Electronics and suitable for wearable electronics, BLE sensor nodes, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP4682DMU12TCG 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 NCP4682 series belongs to onsemi's ultra-low-IQ LDO portfolio, engineered specifically for battery-powered edge devices where runtime, thermal constraints, and board area are critical design factors.
FAQ
What is the maximum input voltage rating for the NCP4682DMU12TCG?
The absolute maximum input voltage for the NCP4682DMU12TCG is 6.0 V per the datasheet Absolute Maximum Ratings table. However, the recommended operating input voltage range is 1.70 V to 5.25 V. Operation above 5.25 V is only permitted up to 5.50 V for ≤500 total hours - not intended for continuous use. For reliable long-term operation, keep VIN ≤5.25 V.
Does the NCP4682DMU12TCG require an external resistor divider for output voltage setting?
No, the NCP4682DMU12TCG is a fixed-output regulator with factory-trimmed 1.2 V output. It does not use an external feedback network. The "DMU" suffix indicates a UDFN4 package with fixed 1.2 V output and auto-discharge functionality - no resistors are needed or supported for voltage adjustment.
How does the auto-discharge feature work in the NCP4682DMU12TCG?
The NCP4682DMU12TCG (D-suffix) integrates an internal N-channel MOSFET between VOUT and GND. When the CE pin is driven low, the regulator disables and the discharge FET turns on, actively pulling the output capacitor to ground. This reduces VOUT to <100 mV within ~1 ms, preventing residual charge from interfering with system reset or back-powering downstream circuitry.
Can the NCP4682DMU12TCG operate with a 0.01 µF ceramic output capacitor?
No. The NCP4682DMU12TCG requires a minimum output capacitance of 0.1 µF ceramic (X5R/X7R) for guaranteed stability, as specified in the datasheet Features list and Application Information section. Using 0.01 µF violates the stability condition and may cause oscillation, poor transient response, or startup failure - especially under load steps or varying input voltage.
Is the exposed thermal pad on the UDFN4 package electrically connected?
Yes, the exposed thermal pad (Tab) on the NCP4682DMU12TCG's UDFN4 package is internally connected to the GND terminal. The datasheet Pin Function Description explicitly states "Tab is GND level" and recommends connecting it to the PCB ground plane to achieve the rated RJA = 250°C/W and prevent thermal throttling during sustained 150 mA operation.
NCP4682DMU12TCG 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.05V @ 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)
NCP4682DMU12TCG FAQ
1.How can I place an order for NCP4682DMU12TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4682DMU12TCG 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 NCP4682DMU12TCG reliable?
The price and inventory of NCP4682DMU12TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4682DMU12TCG is usually 5 days.
3.What payment methods are accepted for NCP4682DMU12TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4682DMU12TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4682DMU12TCG?
NCP4682DMU12TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4682DMU12TCG 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 NCP4682DMU12TCG?
For technical support, including NCP4682DMU12TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4682DMU12TCG requirements.
6.How does Aetrix verify that NCP4682DMU12TCG is sourced from the original manufacturer or authorized distributors?
All NCP4682DMU12TCG 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 NCP4682DMU12TCG meets industry standards.
7.What is the process for return or replacement of NCP4682DMU12TCG?
All NCP4682DMU12TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4682DMU12TCG, 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 NCP4682DMU12TCG part is unused and in its original packaging.
Return procedure for NCP4682DMU12TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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