My Inquiry
My Account
onsemi NCP4683DMU285TCG
- Part No.:
- NCP4683DMU285TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4683DMU285TCG.pdf
- Description:
- IC REG LINEAR 2.85V 300MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP4683DMU285TCG from onsemi is a 300 mA CMOS low-dropout linear voltage regulator with fixed 2.85 V output, ±1.0% accuracy (VOUT > 2.0 V), 0.25 V dropout at 300 mA, and chip-enable functionality. It operates from 1.40 V to 5.25 V input and delivers stable power for space-constrained battery-powered communication equipment.
For engineers reviewing the NCP4683DMU285TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, PSRR performance at 1 kHz, ceramic capacitor stability, thermal resistance in UDFN4 package, and auto-discharge capability in the D-series variant.
Technical Context
The NCP4683DMU285TCG implements a CMOS-based LDO architecture with fold-back current limiting and an integrated NMOS pass transistor. Its enable circuitry features active-high CE with 1.0 V threshold and internal pull-down current (0.3 µA), supporting low-quiescent-power sequencing.
As a D-series variant, it includes an output discharge transistor activated during shutdown-critical for systems requiring rapid VOUT decay to prevent back-powering or latch-up in multi-rail environments. The device is optimized for 1.0 µF ceramic output capacitance and achieves 70 dB PSRR at 1 kHz under 30 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V, ±1.0% accuracy over temperature (−40°C to +85°C) ensures stable core logic supply for microcontrollers and sensors. |
| Max Output Current | 300 mA continuous, enabling direct powering of RF transceivers, camera modules, or low-power DSPs without external boost stages. |
| Dropout Voltage | 0.25 V at 300 mA (VOUT = 2.85 V), allowing operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) sources. |
| PSRR | 70 dB at 1 kHz, suppressing switching noise from upstream DC-DC converters in mixed-signal systems. |
| Quiescent Current | 50 µA typical, minimizing standby power loss in always-on IoT edge nodes and portable medical devices. |
| Package | UDFN4 1.0 × 1.0 mm, 0.65 mm pitch - supports high-density PCB layouts in wearables and compact networking modules. |
| Auto-Discharge | Integrated VOUT-to-GND discharge path (D-series feature) clears output capacitance within milliseconds upon CE deactivation, preventing residual voltage hold-up. |
Pinout & Package
Package: UDFN4 (Case 517BR), 1.0 mm × 1.0 mm, 0.65 mm pitch, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output | Delivers 2.85 V to load; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| GND | Ground reference | Primary return path for load and IC bias currents; thermal pad must be soldered to PCB ground plane for RJA = 250°C/W. |
| CE | Chip enable input | Active-high control (VCEH = 1.0 V min); internal 0.3 µA pull-down enables default-off behavior when left floating or tied to GND. |
| VIN | Input supply | Accepts 1.40–5.25 V; requires local 1.0 µF ceramic decoupling capacitor to suppress line transients and EMI. |
| NC | No connection | Pin 3 (UDFN4) is unconnected; no routing or soldering required-leave unpopulated per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.25 V at 300 mA enables efficient regulation from marginal input sources like aging batteries or low-headroom DC-DC outputs. |
| Ceramic capacitor stability | Stable with ≥1.0 µF X5R/X7R ceramics-eliminates need for costly tantalum or aluminum electrolytics in cost-sensitive consumer designs. |
| Auto-discharge function | Internal discharge transistor rapidly collapses VOUT on disable, preventing back-feed into powered-down subsystems in multi-voltage-domain systems. |
| High PSRR | 70 dB at 1 kHz and 65 dB at 100 kHz reduces ripple coupling from noisy switchers, critical for ADC reference and RF front-end power rails. |
| Thermal protection | Operates up to +150°C junction temperature with built-in thermal shutdown, supporting reliable deployment in enclosed industrial enclosures. |
Applications
| Battery-Powered IoT Sensors | Networking Equipment Power Rails |
|---|---|
Use Scenario: Long-life soil moisture sensor node powered by two AA alkaline cells (3.0 V fresh, ~2.4 V end-of-life). IC Role / Device Role / Timing Role: Primary 2.85 V LDO supplying MCU, BLE radio, and analog sensor interface. Use Value: 0.25 V dropout allows >90% battery utilization; 50 µA quiescent current extends shelf life beyond 5 years in sleep mode. | Use Scenario: Point-of-sale router with multiple USB peripherals and Ethernet PHY requiring clean 2.85 V supply. IC Role / Device Role / Timing Role: Post-regulator cleaning up ripple from primary 3.3 V buck converter feeding USB controller and PHY logic. Use Value: 70 dB PSRR at 1 kHz attenuates switching noise, reducing USB packet error rate and improving Ethernet link stability. |
| Portable Medical Monitors | Smart Home Camera Modules |
Use Scenario: Handheld pulse oximeter using single-cell Li-ion (2.8–4.2 V) with strict low-noise analog front-end requirements. IC Role / Device Role / Timing Role: Dedicated 2.85 V rail for ADC reference and op-amp signal conditioning circuitry. Use Value: 65 µVRMS output noise (10 Hz–100 kHz) preserves SNR in photodiode signal chain; ±1.0% accuracy maintains calibration integrity. | Use Scenario: Indoor security camera with motion-triggered wake-up and always-on video analytics processor. IC Role / Device Role / Timing Role: Enable-controlled 2.85 V supply for image sensor and ISP, disabled during idle to eliminate leakage. Use Value: Active-high CE with fast startup (<100 µs) and auto-discharge ensures deterministic power state transitions, eliminating boot-time glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826T-285I/OT | Higher dropout (0.35 V @ 300 mA), no auto-discharge, SOT-23-5 package (larger footprint) | Lacks rapid VOUT discharge; unsuitable where back-powering of downstream logic must be avoided | Select when board space permits larger package and auto-discharge is unnecessary |
| Torex XC6210B285MR-G | Same 2.85 V output, 0.22 V dropout, but only 200 mA rated output; UDFN1010 package identical | Lower current rating limits use to sub-200 mA loads like MCUs without peripherals | Choose for ultra-low-cost designs where 200 mA suffices and BOM consolidation is prioritized |
Compared with MCP1826T-285I/OT and XC6210B285MR-G, the NCP4683DMU285TCG uniquely combines 300 mA capability, 0.25 V dropout, and integrated auto-discharge in a 1.0 × 1.0 mm UDFN4 package-enabling higher integration density and safer multi-rail sequencing in compact, battery-critical systems.
Availability
NCP4683DMU285TCG is available at Aetrix Electronics and suitable for battery-powered IoT sensors, networking equipment power rails, and portable medical monitors requiring stable component supply with guaranteed long-term availability.
Supply support for NCP4683DMU285TCG 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP4683 series targets ultra-compact, low-power portable electronics-designed specifically for battery longevity, fast enable/disable control, and seamless integration with ceramic capacitors in space-constrained PCBs.
FAQ
What is the maximum input voltage rating for the NCP4683DMU285TCG?
The absolute maximum input voltage for the NCP4683DMU285TCG is 6.0 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended input range is 1.40 V to 5.25 V per the Electrical Characteristics table. Exceeding 5.25 V may degrade long-term reliability even if below the 6.0 V absolute limit.
Does the NCP4683DMU285TCG require an external resistor to set output voltage?
No, the NCP4683DMU285TCG is a fixed-output regulator with factory-trimmed 2.85 V. It does not support adjustable output via external resistors. The "DMU" suffix confirms it is a fixed-voltage D-series variant in UDFN4 packaging-output voltage is laser-trimmed during production and cannot be modified externally.
How does the auto-discharge feature work in the NCP4683DMU285TCG?
When the CE pin is driven low, the NCP4683DMU285TCG activates an internal NMOS transistor between VOUT and GND. This provides a controlled discharge path that collapses the output voltage rapidly-typically within tens of microseconds-preventing residual charge from back-powering downstream circuitry or interfering with system reset sequencing.
Can the NCP4683DMU285TCG operate with a 1.0 µF ceramic capacitor on the output?
Yes, the NCP4683DMU285TCG is explicitly characterized and guaranteed stable with ≥1.0 µF X5R or X7R ceramic capacitors on the output. Using smaller values or higher-ESR types (e.g., tantalum) may cause instability or oscillation. The datasheet confirms stability across temperature and load conditions with this minimum value.
What is the thermal resistance (RJA) of the NCP4683DMU285TCG in its UDFN4 package?
The junction-to-air thermal resistance (RJA) for the NCP4683DMU285TCG in the UDFN4 (Case 517BR) package is 250°C/W, measured with standard JEDEC 2S2P test board conditions. Actual performance improves significantly with proper PCB copper pour connected to the exposed thermal pad, enabling sustained 300 mA operation in ambient temperatures up to +85°C.
NCP4683DMU285TCG 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):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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)
NCP4683DMU285TCG FAQ
1.How can I place an order for NCP4683DMU285TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4683DMU285TCG 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 NCP4683DMU285TCG reliable?
The price and inventory of NCP4683DMU285TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4683DMU285TCG is usually 5 days.
3.What payment methods are accepted for NCP4683DMU285TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4683DMU285TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4683DMU285TCG?
NCP4683DMU285TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4683DMU285TCG 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 NCP4683DMU285TCG?
For technical support, including NCP4683DMU285TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4683DMU285TCG requirements.
6.How does Aetrix verify that NCP4683DMU285TCG is sourced from the original manufacturer or authorized distributors?
All NCP4683DMU285TCG 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 NCP4683DMU285TCG meets industry standards.
7.What is the process for return or replacement of NCP4683DMU285TCG?
All NCP4683DMU285TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4683DMU285TCG, 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 NCP4683DMU285TCG part is unused and in its original packaging.
Return procedure for NCP4683DMU285TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP4683DMU285TCG Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
