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onsemi NCP4683DMU12TCG
- Part No.:
- NCP4683DMU12TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4683DMU12TCG.pdf
- Description:
- IC REG LINEAR 1.2V 300MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,649
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Product details
Overview
NCP4683DMU12TCG from onsemi is a 300 mA CMOS low-dropout linear voltage regulator with fixed 1.2 V output, ±1.0% accuracy (VOUT > 2.0 V), 0.25 V dropout at 300 mA/2.8 V, and 70 dB PSRR at 1 kHz. It features chip enable (active-high), current fold-back protection, and stable operation with ≥1.0 µF ceramic output capacitors. This regulator powers core logic rails in compact battery-powered communication equipment.
For engineers reviewing the NCP4683DMU12TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its UDFN4 1.0×1.0 mm package, auto-discharge capability (D-version), 50 µA quiescent current, and thermal performance under 300 mA load in space-constrained portable designs.
Technical Context
The NCP4683DMU12TCG implements a CMOS-based LDO architecture with internal reference, error amplifier, and P-channel pass transistor. Its active-high CE pin controls full shutdown with 0.1–1.0 µA standby current, and the D-version integrates an N-channel output discharge transistor activated during disable to rapidly deplete VOUT capacitance.
Designed for high-PSRR, low-noise operation, it achieves 70 dB rejection at 1 kHz and 65 µVRMS integrated noise (10 Hz–100 kHz). The regulator maintains stability across input voltages from 1.40 V to 5.25 V and supports output currents up to 300 mA with thermal shutdown and fold-back current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V with ±1.0% accuracy over temperature (−40°C to +85°C) for precise core logic supply. |
| Max Output Current | 300 mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in portable systems. |
| Dropout Voltage | 0.25 V at 300 mA and VOUT = 2.8 V; enables efficient operation even with tight VIN–VOUT margins. |
| Quiescent Current | 50 µA typical - minimizes battery drain in always-on or low-power sleep modes. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Package | UDFN4 1.0 × 1.0 mm, 0.65 mm pitch - ultra-compact footprint for high-density PCB layouts. |
| Auto-Discharge | Integrated Nch discharge FET (D-version) - ensures rapid VOUT decay during shutdown, preventing back-powering. |
Pinout & Package
Package: UDFN4 1.0 × 1.0 mm (Case 517BR), Pb-free, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output | Delivers stable 1.2 V to load; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for stability. |
| GND | Ground reference | Common return path for input, output, and CE; thermal pad must be soldered to PCB ground plane for thermal relief. |
| CE | Chip enable (active-high) | Drives regulator ON when ≥1.0 V applied; pulls down to ~0.4 V threshold for OFF state; internal 0.3 µA pull-down current source. |
| VIN | Input supply | Accepts 1.40–5.25 V; requires ≥1.0 µF ceramic decoupling capacitor close to pin to ensure line transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50 µA typical - extends battery life in IoT sensors and wearables operating intermittently. |
| Fast load transient response | ≤10 mV deviation for 1–300 mA step (VIN = VOUT + 1 V); maintains system stability during processor wake-up bursts. |
| Auto-discharge function | Active during shutdown - discharges output capacitance within milliseconds, eliminating residual voltage that could interfere with downstream power sequencing. |
| Ceramic capacitor compatibility | Stable with ≥1.0 µF X5R/X7R ceramics - eliminates need for larger, costlier tantalum or electrolytic capacitors. |
| High PSRR at audio frequencies | 70 dB at 1 kHz - critical for noise-sensitive analog circuits (e.g., ADC references, RF bias rails) powered from noisy DC-DC sources. |
Applications
| Battery-Powered Portable Devices | Networking Equipment Power Rails |
|---|---|
Use Scenario: Powering ARM Cortex-M microcontrollers and BLE radios in compact handheld test instruments. IC Role / Device Role / Timing Role: Primary 1.2 V core supply for MCU VDD_IO and radio transceiver analog/digital domains. Use Value: 50 µA IQ and auto-discharge minimize standby power loss; UDFN4 footprint saves board area in <50 mm² enclosures. |
Use Scenario: Providing clean 1.2 V bias to Ethernet PHYs and packet buffer memory in small-form-factor switches. IC Role / Device Role / Timing Role: Low-noise post-regulator for noise-sensitive analog front-ends and SerDes reference supplies. Use Value: 70 dB PSRR suppresses switching noise from upstream 5 V buck converters, reducing jitter in Gigabit Ethernet links. |
| Camera Module Core Supply | Home Appliance Control Boards |
Use Scenario: Delivering regulated 1.2 V to image sensor ISP cores and MIPI CSI-2 interface logic in security cameras. IC Role / Device Role / Timing Role: Precision voltage source for digital imaging pipelines requiring tight voltage tolerance and fast load response. Use Value: ±1.0% output accuracy ensures consistent pixel processing; 300 mA capacity supports burst-mode image capture without droop. |
Use Scenario: Supplying 1.2 V to MCU peripherals (touch controllers, display drivers) in smart refrigerators and washing machines. IC Role / Device Role / Timing Role: Secondary LDO for isolated subsystems requiring independent power control via CE pin. Use Value: Active-high CE enables firmware-controlled power gating of non-critical modules, reducing overall system standby consumption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/MB | 250 mA max output, 6 µA IQ, no auto-discharge, SOT-23-3 package | Lacks CE pin and discharge FET; unsuitable for strict power sequencing or fast shutdown requirements | Select when ultra-low IQ dominates over discharge needs and board space allows SOT-23-3. |
| Torex XC6206P122MR-G | 300 mA, 1.2 V fixed, 15 µA IQ, no CE pin, SOT-25 package | No enable control or auto-discharge; limited to always-on configurations | Choose for cost-sensitive, non-sequenced applications where minimal IQ and simplicity outweigh control flexibility. |
Compared with MCP1700T-1202E/MB and XC6206P122MR-G, the NCP4683DMU12TCG uniquely combines 300 mA drive, 50 µA IQ, active-high CE, and integrated auto-discharge in a 1.0×1.0 mm UDFN - enabling compact, sequenced, and battery-efficient designs where rapid VOUT decay is mandatory.
Availability
NCP4683DMU12TCG is available at Aetrix Electronics and suitable for battery-powered portable devices, networking equipment power rails, and camera module core supplies requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for NCP4683DMU12TCG 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP4683DMU12TCG belongs to onsemi's precision LDO family designed for ultra-low-power, space-constrained applications demanding high accuracy, fast transient response, and advanced power control features like auto-discharge.
FAQ
What is the maximum input voltage rating for the NCP4683DMU12TCG?
The NCP4683DMU12TCG has an absolute maximum input voltage of 6.0 V per its Absolute Maximum Ratings table. Operation above 5.25 V is outside the specified operating range and may compromise reliability or parametric performance. For sustained use, VIN must remain ≤5.25 V with proper derating based on ambient temperature and power dissipation.
Does the NCP4683DMU12TCG require external components for stable operation?
Yes - the NCP4683DMU12TCG requires a minimum 1.0 µF ceramic capacitor on both VIN and VOUT pins, placed as close as possible to the device. These capacitors ensure stability, improve line/load transient response, and reduce output noise. Tantalum or aluminum electrolytic capacitors are not recommended due to ESR-related instability risks.
How does the auto-discharge feature work in the NCP4683DMU12TCG?
The NCP4683DMU12TCG (D-version) integrates an N-channel transistor between VOUT and GND. When the CE pin is driven low, this transistor turns on and actively discharges the output capacitor, bringing VOUT to near-zero volts within milliseconds. This prevents back-powering of upstream circuitry and supports clean power sequencing in multi-rail systems.
What is the thermal resistance (RJA) of the NCP4683DMU12TCG in its UDFN4 package?
The NCP4683DMU12TCG in the UDFN4 1.0×1.0 mm package has a junction-to-air thermal resistance (RJA) of 250°C/W, as specified in the Thermal Characteristics table. Effective thermal performance depends on PCB layout - the exposed thermal pad must be soldered to a solid GND copper pour to realize this rating; insufficient copper area will increase actual RJA.
Can the NCP4683DMU12TCG be used with input voltages below 1.4 V?
No - the NCP4683DMU12TCG has a specified operating input voltage range of 1.40 V to 5.25 V. Below 1.40 V, the regulator cannot maintain regulation or guarantee output accuracy, PSRR, or dropout performance. Attempting operation below this threshold may result in unregulated output or functional failure.
NCP4683DMU12TCG 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):
- 0.5V @ 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)
NCP4683DMU12TCG FAQ
1.How can I place an order for NCP4683DMU12TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4683DMU12TCG 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 NCP4683DMU12TCG reliable?
The price and inventory of NCP4683DMU12TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4683DMU12TCG is usually 5 days.
3.What payment methods are accepted for NCP4683DMU12TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4683DMU12TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4683DMU12TCG?
NCP4683DMU12TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4683DMU12TCG 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 NCP4683DMU12TCG?
For technical support, including NCP4683DMU12TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4683DMU12TCG requirements.
6.How does Aetrix verify that NCP4683DMU12TCG is sourced from the original manufacturer or authorized distributors?
All NCP4683DMU12TCG 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 NCP4683DMU12TCG meets industry standards.
7.What is the process for return or replacement of NCP4683DMU12TCG?
All NCP4683DMU12TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4683DMU12TCG, 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 NCP4683DMU12TCG part is unused and in its original packaging.
Return procedure for NCP4683DMU12TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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