My Inquiry
My Account
onsemi NCP4683HMU185TCG
- Part No.:
- NCP4683HMU185TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP4683HMU185TCG.pdf
- Description:
- IC REG LINEAR 1.85V 300MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,187
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP4683HMU185TCG from onsemi is a 300 mA CMOS low-dropout linear voltage regulator with fixed 1.85 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 - designed for stable power delivery in space-constrained portable electronics.
For engineers reviewing the NCP4683HMU185TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its UDFN4 1.0 × 1.0 mm package, chip-enable functionality, ceramic-capacitor stability (≥1.0 µF), current fold-back protection, and thermal performance under 300 mA load in battery-powered systems.
Technical Context
The NCP4683HMU185TCG implements a CMOS-based LDO architecture with internal reference and error amplifier driving an N-channel pass transistor. Its enable logic is active-high, with CE threshold of 1.0 V (H) and 0.4 V (L), and includes internal pull-down current (0.3 µA).
It delivers regulated 1.85 V output across input voltages from 1.40 V to 5.25 V, supports operation from −40°C to +85°C ambient, and maintains stability with ≥1.0 µF ceramic output capacitance - no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85 V, ±1.0% accuracy over temperature (−40°C to +85°C) ensures reliable core/bias rail for 1.8 V logic and analog circuits. |
| Max Output Current | 300 mA continuous - sufficient for powering microcontrollers, sensors, and RF front-ends in compact devices. |
| Dropout Voltage | 0.25 V at 300 mA and 2.8 V output - enables regulation from 2.1 V input, extending battery runtime in single-cell Li-ion or multi-cell alkaline systems. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters, critical for noise-sensitive analog and RF stages. |
| Quiescent Current | 50 µA typical - minimizes standby power loss in always-on or low-power wake-up applications. |
| Enable Threshold | VCEH = 1.0 V, VCEL = 0.4 V - compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Stability | Stable with ≥1.0 µF ceramic output capacitor - eliminates need for tantalum or electrolytic caps, reducing BOM cost and board area. |
Pinout & Package
Package: UDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed thermal pad connected to GND (case 517BR). Pin 1 marked by corner chamfer; tab is GND-level and recommended to be soldered to PCB ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output | Delivers stable 1.85 V; requires local 1.0 µF ceramic decoupling placed adjacent to pin. |
| GND (Pin 2) | Ground reference | Common return for input/output paths and internal circuitry; connects to exposed thermal pad. |
| CE (Pin 3) | Chip enable control | Active-high logic input; drives regulator into ultra-low-IQ standby (0.1–1.0 µA) when pulled low. |
| VIN (Pin 4) | Input supply | Accepts 1.40–5.25 V; requires 1.0 µF ceramic input capacitor placed near this pin and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 0.25 V @ 300 mA enables operation from marginal input sources like partially discharged batteries. |
| High PSRR | 70 dB @ 1 kHz rejects ripple from noisy switchers, preserving signal integrity in mixed-signal SoCs. |
| Current fold-back protection | Reduces output current and voltage during overload, preventing thermal runaway and enabling safe recovery. |
| Ultra-low quiescent current | 50 µA typical allows >1-year battery life in always-on sensor nodes with intermittent wake-ups. |
| Ceramic-capacitor stability | No ESR requirements simplify design, reduce cost, and improve reliability versus tantalum alternatives. |
Applications
| Wireless Sensor Node Power | Portable Camera Core Rail |
|---|---|
Use Scenario: Powering BLE/Wi-Fi MCU, MEMS sensor, and RF transceiver from coin cell or Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.85 V LDO delivering clean, regulated bias for digital and analog subsystems. Use Value: 50 µA IQ extends battery life; 0.25 V dropout maximizes usable battery voltage range. | Use Scenario: Supplying image sensor and ISP core logic in compact action cameras or drones. IC Role / Device Role / Timing Role: Fixed-output LDO providing low-noise 1.85 V rail for pixel processing and ADC reference. Use Value: 70 dB PSRR suppresses switching noise from PMIC, minimizing image artifacts and quantization errors. |
| Home Appliance Microcontroller Bias | STB/OTT Decoder SoC I/O Rail |
Use Scenario: Powering 32-bit MCU and touch controller in smart thermostats or appliances. IC Role / Device Role / Timing Role: Standby-capable LDO supplying 1.85 V to MCU core and peripherals. Use Value: Active-high CE enables precise power sequencing and deep-sleep mode with sub-µA system leakage. | Use Scenario: Providing stable 1.85 V I/O supply for HDMI PHY, USB interface, and memory controllers in set-top boxes. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating sensitive I/O from noisy system rails. Use Value: Ceramic-capacitor compatibility simplifies layout and improves transient response during burst data transfers. |
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 | 1.8 V fixed output, 250 mA max, 6 µA IQ, SOT-23 package | Lowers IQ but reduces current capability and lacks CE pin | Select for ultra-low-power, lower-current applications where enable control is unnecessary. |
| Torex XC6206P182MR-G | 1.8 V fixed output, 300 mA, 1.0 µA IQ, SOT-25 package, no CE | Lower IQ and same current rating, but no enable function and different pinout | Choose when minimal quiescent current is critical and system-level enable control is handled externally. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP4683HMU185TCG provides higher output accuracy (±1.0%), integrated CE for system-level power management, and UDFN4 packaging for superior thermal performance in dense layouts - making it optimal for 1.85 V rails requiring precision, controllability, and space efficiency.
Availability
NCP4683HMU185TCG is available at Aetrix Electronics and suitable for battery-powered equipment, networking and communication equipment, and home appliances requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCP4683HMU185TCG 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT markets.
The NCP4683 series belongs to onsemi's precision LDO portfolio, engineered specifically for portable and battery-operated applications demanding low dropout, low quiescent current, and small-footprint packaging.
FAQ
What is the output voltage tolerance of the NCP4683HMU185TCG over temperature?
The NCP4683HMU185TCG has ±1.0% output voltage accuracy for VOUT > 2.0 V at +25°C, and ±3.0% over the full operating temperature range of −40°C to +85°C. Since its nominal output is 1.85 V (<2.0 V), the absolute tolerance is ±60 mV across temperature - confirmed in the Electrical Characteristics table on page 3 of the datasheet.
Does the NCP4683HMU185TCG require an external resistor network to set output voltage?
No. The NCP4683HMU185TCG is a fixed-output regulator with factory-trimmed 1.85 V output. It does not support adjustable output via external resistors - all variants in the NCP4683 family are preset at manufacture and specified in the Ordering Information table (page 18).
Can the NCP4683HMU185TCG operate with a 1.5 V input supply?
No. The NCP4683HMU185TCG requires a minimum input voltage of 1.40 V, but its dropout voltage at 300 mA is 0.25 V for 2.8 V output - extrapolating to ~0.29 V at 1.85 V output. Thus, to maintain regulation at full load, VIN must be ≥2.14 V. At 1.5 V input, the device enters dropout and cannot sustain 1.85 V output.
Is the thermal pad on the UDFN4 package of the NCP4683HMU185TCG electrically connected?
Yes. The exposed thermal pad on the NCP4683HMU185TCG UDFN4 package (case 517BR) is internally connected to GND. The datasheet states "Tab is GND level" and recommends connecting it to the PCB ground plane for optimal thermal dissipation and EMI performance - leaving it unconnected is acceptable but degrades thermal resistance by ~25°C/W.
What is the maximum junction temperature rating for the NCP4683HMU185TCG?
The NCP4683HMU185TCG has a maximum junction temperature (TJ) rating of +150°C, as specified in the Absolute Maximum Ratings table (page 2). Its thermal resistance θJA is 250°C/W for the UDFN4 package, meaning at 300 mA load and 50°C ambient, junction temperature rises ~37.5°C above ambient - well within safe operating limits.
NCP4683HMU185TCG 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 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)
NCP4683HMU185TCG FAQ
1.How can I place an order for NCP4683HMU185TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4683HMU185TCG 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 NCP4683HMU185TCG reliable?
The price and inventory of NCP4683HMU185TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4683HMU185TCG is usually 5 days.
3.What payment methods are accepted for NCP4683HMU185TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4683HMU185TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4683HMU185TCG?
NCP4683HMU185TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4683HMU185TCG 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 NCP4683HMU185TCG?
For technical support, including NCP4683HMU185TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4683HMU185TCG requirements.
6.How does Aetrix verify that NCP4683HMU185TCG is sourced from the original manufacturer or authorized distributors?
All NCP4683HMU185TCG 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 NCP4683HMU185TCG meets industry standards.
7.What is the process for return or replacement of NCP4683HMU185TCG?
All NCP4683HMU185TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4683HMU185TCG, 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 NCP4683HMU185TCG part is unused and in its original packaging.
Return procedure for NCP4683HMU185TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP4683HMU185TCG 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…
