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onsemi NCP4686DSN10T1G
- Part No.:
- NCP4686DSN10T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4686DSN10T1G.pdf
- Description:
- IC REG LINEAR 1V 400MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
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Product details
Overview
NCP4686DSN10T1G from onsemi is a 400 mA, high-accuracy, low-dropout linear regulator optimized for ultra-low-voltage operation (1.0 V input) and precision 1.0 V output. It features ±0.8% output voltage accuracy at 25°C, 0.28 V dropout at 400 mA (for 1.0 V output), 48 µA quiescent current, and integrated chip enable with active-high logic. It is widely used in battery-powered portable electronics requiring stable, low-noise 1.0 V supply for core logic or I/O rails.
For engineers reviewing the NCP4686DSN10T1G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific pin mapping, real-world application use cases, and validated alternative options - all grounded in the official onsemi NCP4686 datasheet (Rev. 1, Feb 2012).
Technical Context
The NCP4686DSN10T1G implements a CMOS-based LDO architecture with an N-channel pass transistor, enabling low dropout and high efficiency at sub-1.2 V output levels. Its internal constant-slope soft-start circuit eliminates output overshoot and minimizes inrush current during power-up.
It integrates fold-back current limiting and an auto-discharge function (via internal VOUT-to-GND transistor), activated upon CE deactivation. The device operates across −40°C to +85°C ambient and supports ceramic output capacitors ≥1 µF without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V (±0.8% accuracy at TA = 25°C; ±1.7% over −40°C to +85°C) |
| Max Output Current | 400 mA - sufficient for powering low-voltage microcontrollers, memory, or sensor interfaces |
| Dropout Voltage | 0.28 V at 400 mA - enables regulation from 1.28 V input, critical for single-cell Li-ion or coin-cell systems |
| Quiescent Current | 48 µA - ensures minimal battery drain in always-on or standby modes |
| PSRR | 60 dB at 10 kHz - suppresses switching noise from upstream DC/DC converters |
| Enable Threshold | VCEH = 0.9 V min - compatible with 1.0–1.2 V logic-level control signals |
| Stability | Guaranteed with ≥1 µF ceramic output capacitor - eliminates need for tantalum or electrolytic parts |
Pinout & Package
The NCP4686DSN10T1G is packaged in Pb-free SOT-23-5 (Case 1212), with 1.2 mm × 1.5 mm footprint and 0.95 mm pitch. Thermal resistance RJA = 238°C/W enables reliable operation up to 400 mW dissipation at +85°C ambient.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin - accepts 1.0 V to 3.6 V; requires local 1 µF ceramic decoupling |
| 2 | GND | Analog/digital ground reference - must be low-impedance and tied directly to PCB ground plane |
| 3 | CE | Active-high chip enable - pulls down internally; tie to VIN if always-on operation required |
| 4 | VOUT | Regulated 1.0 V output - connects to load and 1 µF ceramic capacitor; supports auto-discharge |
| 5 | NC | No connection - electrically isolated; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage support | Operates down to 1.0 V input - enables direct regulation from single LiFePO₄ or NiMH cells |
| High initial accuracy | ±0.8% output tolerance at 25°C - reduces need for post-production calibration in precision systems |
| Integrated soft-start | Constant-slope startup - prevents output overshoot and eliminates external timing components |
| Auto-output discharge | Internal VOUT-to-GND switch - discharges output capacitor within microseconds after disable, improving system reset integrity |
| Low-noise performance | 30 µVRMS output noise (10 Hz–100 kHz) - suitable for noise-sensitive analog or RF subsystems |
Applications
| Mobile Point-of-Sale Terminals | Wearable Health Sensors |
|---|---|
Use Scenario: Compact, battery-operated terminals with Bluetooth LE and touch interface requiring clean 1.0 V rail for MCU core voltage. IC Role / Device Role / Timing Role: Primary LDO supplying 1.0 V to ARM Cortex-M0+ core and embedded flash controller. Use Value: 48 µA quiescent current extends battery life beyond 12 months in sleep mode; ±0.8% accuracy ensures consistent clock generation and ADC reference stability. |
Use Scenario: Ultra-thin wrist-worn ECG/PPG modules powered by CR2032 coin cell, needing regulated 1.0 V for analog front-end and BLE SoC. IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator delivering stable 1.0 V to signal-chain amplifiers and ADC reference inputs. Use Value: 30 µVRMS output noise avoids corruption of microvolt-level biopotential signals; 0.28 V dropout allows >90% battery utilization before brownout. |
| Industrial IoT Edge Nodes | Smart Home Motion Sensors |
Use Scenario: Battery-powered wireless vibration monitors deployed in factory environments, operating continuously for 5+ years on AA cells. IC Role / Device Role / Timing Role: Power management IC providing 1.0 V to ultra-low-power MCU and MEMS accelerometer interface. Use Value: Fold-back current limiting protects against short-circuit faults in harsh wiring conditions; −40°C to +85°C rating ensures reliability in uncontrolled enclosures. |
Use Scenario: PIR-based occupancy sensors using lithium thionyl chloride primary batteries, requiring long-term stability and fast wake-up response. IC Role / Device Role / Timing Role: Enable-controlled LDO that powers sensor interface only during detection events, minimizing average current draw. Use Value: Active-high CE pin synchronizes with MCU GPIO; auto-discharge clears residual charge on output cap between wake cycles, ensuring deterministic reset behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1804T-1002I/OT | Fixed 1.0 V output, 150 mA max, 120 µA IQ, no auto-discharge, SOT-23-5 | Limited to lower-current loads; lacks soft-start and output discharge - unsuitable for high-capacitance or fast-wake systems | Select when cost sensitivity outweighs performance needs and load current stays below 150 mA. |
| Torex XC6210B102MR-G | Fixed 1.0 V, 300 mA, 25 µA IQ, 0.25 V dropout, no CE pin, SOT-25 | Lower quiescent current but no enable control - forces always-on operation; incompatible pinout (5-pin vs. 5-pin but different pin assignment) | Choose only for space-constrained designs where enable functionality is omitted and 300 mA suffices. |
Compared with MCP1804T-1002I/OT and XC6210B102MR-G, the NCP4686DSN10T1G uniquely combines 400 mA drive, 48 µA IQ, active-high CE, auto-discharge, and constant-slope soft-start - making it the only option among the three qualified for high-reliability, fast-wake, battery-critical applications demanding full 1.0 V rail control.
Availability
NCP4686DSN10T1G is available at Aetrix Electronics and suitable for battery-powered equipment, wearable health sensors, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP4686DSN10T1G 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 NCP4686DSN10T1G belongs to onsemi's high-accuracy, low-input-voltage LDO family, designed specifically for next-generation portable electronics where ultra-low voltage operation, minimal quiescent power, and robust transient response are mandatory.
FAQ
What is the maximum input voltage rating for the NCP4686DSN10T1G?
The NCP4686DSN10T1G has an absolute maximum input voltage of 4.0 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended input range is 1.0 V to 3.6 V - aligning with its design for single-cell battery and low-voltage system applications. Always observe derating guidelines per thermal conditions.
Does the NCP4686DSN10T1G require an external capacitor on the CE pin?
No, the NCP4686DSN10T1G does not require an external capacitor on the CE pin. Its enable input features an internal pull-down current source and is designed for direct connection to logic-level signals (e.g., MCU GPIO). Adding capacitance may slow enable/disable transitions and compromise the intended fast-response behavior of the auto-discharge function.
Can the NCP4686DSN10T1G be used with a 0.47 µF output capacitor?
No - the NCP4686DSN10T1G requires a minimum of 1.0 µF ceramic output capacitor for guaranteed stability, as specified in the datasheet. Using 0.47 µF may cause oscillation or poor transient response, especially under load steps. Always use ≥1 µF X5R/X7R ceramic capacitors placed adjacent to the VOUT and GND pins.
Is the NCP4686DSN10T1G RoHS-compliant and halogen-free?
Yes, the NCP4686DSN10T1G is a Pb-free device and fully RoHS-compliant per EU Directive 2011/65/EU. It also meets JESD201A Class 2A for whisker resistance and is halogen-free per JS709B - confirmed in the official onsemi packaging documentation and material declarations.
How does the auto-discharge function operate in the NCP4686DSN10T1G?
When the CE pin is driven low, the NCP4686DSN10T1G activates an internal NMOS transistor between VOUT and GND, rapidly discharging the output capacitor. This feature ensures the output falls to near-zero volts within microseconds, preventing unintended wake-up or latch-up in downstream circuits - a key requirement in systems with strict power sequencing rules.
NCP4686DSN10T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
NCP4686DSN10T1G FAQ
1.How can I place an order for NCP4686DSN10T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4686DSN10T1G 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 NCP4686DSN10T1G reliable?
The price and inventory of NCP4686DSN10T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4686DSN10T1G is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4686DSN10T1G transactions.
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4.How is shipping managed for NCP4686DSN10T1G?
NCP4686DSN10T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4686DSN10T1G 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 NCP4686DSN10T1G?
For technical support, including NCP4686DSN10T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4686DSN10T1G requirements.
6.How does Aetrix verify that NCP4686DSN10T1G is sourced from the original manufacturer or authorized distributors?
All NCP4686DSN10T1G 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 NCP4686DSN10T1G meets industry standards.
7.What is the process for return or replacement of NCP4686DSN10T1G?
All NCP4686DSN10T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4686DSN10T1G, 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 NCP4686DSN10T1G part is unused and in its original packaging.
Return procedure for NCP4686DSN10T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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