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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi NCP4680DMX12TCG

Name: NCP4680DMX12TCG
Brand: onsemi
SKU: NCP4680DMX12TCG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP4680DMX12TCG

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 4-XFDFN Exposed Pad

Datasheet:: NCP4680DMX12TCG.pdf

Description:: IC REG LINEAR 1.2V 150MA 4XDFN

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Product details

Overview

NCP4680DMX12TCG from onsemi is a 150 mA, low-noise, low-dropout linear voltage regulator with fixed 1.2 V output, ±1.0% accuracy, 0.28 V dropout at 150 mA (V_OUT = 1.2 V), and 75 dB PSRR at 1 kHz - designed for power-sensitive applications in battery-powered and communication equipment.

For engineers reviewing the NCP4680DMX12TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its XDFN4 0.8×0.8 mm package, auto-discharge function, 50 µA quiescent current, ceramic-capacitor stability (≥0.1 µF), and enable-controlled shutdown with fast output discharge.

Technical Context

The NCP4680DMX12TCG implements a CMOS-based LDO architecture with fold-back current limiting and an integrated output discharger transistor activated during disable mode. Its internal reference and error amplifier deliver tight regulation across −40°C to +85°C ambient.

It operates from 1.40 V to 5.25 V input, supports 1.2 V fixed output with ±1.0% initial accuracy and ±30 ppm/°C tempco (for V_OUT ≥ 1.8 V; 1.2 V version specified at ±50 mV over temperature), and maintains stability with minimal 0.1 µF ceramic output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2 V ±1.0% (±12 mV) at 25°C; ±50 mV over −40°C to +85°C - ensures stable core/bias rail for low-voltage logic and sensors.
Max Output Current	150 mA continuous - sufficient for powering microcontrollers, RF transceivers, or sensor signal chains without external pass devices.
Dropout Voltage	0.28 V at I_OUT = 150 mA (V_OUT = 1.2 V) - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (2.4 V min) with margin.
PSRR	75 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input.
Quiescent Current	50 µA typical - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up circuitry.
Enable Threshold	V_CEH = 1.0 V min, V_CEL = 0.4 V max - compatible with 1.2 V, 1.8 V, and 3.3 V GPIO logic levels for clean enable/disable control.
Output Discharge	Integrated V_OUT-to-GND transistor - actively discharges output capacitor during shutdown, preventing residual voltage hold-up in sequencing-critical systems.

Pinout & Package

Package: XDFN4 0.8 mm × 0.8 mm, 0.48 mm pitch, exposed thermal pad (connected to GND). Compact footprint ideal for space-constrained portable designs.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 1)	Regulated output	Delivers stable 1.2 V; requires 0.1 µF ceramic capacitor placed adjacent to pin for stability and transient response.
GND (Pin 2)	Ground reference	Primary return path for load and IC bias currents; connects to exposed thermal pad for improved thermal performance.
CE (Pin 3)	Chip enable input	Active-high logic control; internal pull-down ensures default-off state; drives output discharge when pulled low.
VIN (Pin 4)	Input supply	Accepts 1.40–5.25 V; requires 0.1 µF ceramic decoupling capacitor close to this pin to suppress input ripple and noise.

Key Features

Feature	Design Value
Auto-output discharge	Integrated NMOS switch discharges VOUT to GND within microseconds upon CE deactivation - eliminates need for external bleed resistors in power-sequenced systems.
Ceramic capacitor stability	Stable with ≥0.1 µF X5R/X7R ceramic output capacitor - reduces BOM count and PCB area vs. tantalum or electrolytic alternatives.
Fold-back current limit	Reduces output current under overload/short-circuit to ~40 mA - limits junction temperature rise and enables safe self-recovery without latch-up.
Low-noise operation	Output noise ≤ 40 × V_OUT = 48 µV_rms (10 Hz–100 kHz) - suitable for noise-sensitive analog circuits like ADC references or RF bias rails.
Pb-free, RoHS-compliant	Meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) - supports standard reflow profiles without baking.

Applications

Battery-Powered IoT Sensors	USB-Powered Peripheral Modules
Use Scenario: Ultra-low-power environmental sensor node powered by coin cell or rechargeable Li-ion, requiring regulated 1.2 V for MCU core and analog front-end. IC Role / Device Role / Timing Role: Primary LDO supplying MCU V_DD and sensor bias; enables deep-sleep current <1 µA via CE control. Use Value: 50 µA quiescent current and auto-discharge prevent battery drain during sleep; ±1.0% output accuracy ensures consistent ADC reference and timing oscillator performance.	Use Scenario: USB 2.0 peripheral (e.g., HID device) deriving 1.2 V rail from 5 V USB bus using upstream DC-DC converter + LDO post-regulation. IC Role / Device Role / Timing Role: Noise-filtering post-regulator for digital core logic; rejects switching noise from buck converter feeding VIN. Use Value: 75 dB PSRR at 1 kHz attenuates 100–500 kHz switching artifacts; 0.28 V dropout allows >90% efficiency at light loads while maintaining USB voltage compliance.
Industrial Control Signal Conditioning	Camera Module Power Management
Use Scenario: 4–20 mA loop-powered transmitter with isolated microcontroller requiring precise 1.2 V supply for DAC and op-amp bias. IC Role / Device Role / Timing Role: Isolated-side LDO delivering accurate, low-noise bias for precision analog circuitry. Use Value: ±50 mV output tolerance over temperature ensures <0.5% full-scale error in 16-bit DAC output; fold-back protection prevents thermal runaway during field wiring faults.	Use Scenario: Mobile camera module with image sensor and ISP requiring clean 1.2 V core supply synchronized with frame capture timing. IC Role / Device Role / Timing Role: Dedicated LDO for sensor/ISP core domain, controlled via host processor GPIO to enable/disable per frame burst. Use Value: Fast output discharge (<100 µs) eliminates voltage hold-up that could cause sensor reset glitches between frames; XDFN4 package fits tight camera flex PCB layouts.

Battery-Powered IoT Sensors

USB-Powered Peripheral Modules

Use Scenario: Ultra-low-power environmental sensor node powered by coin cell or rechargeable Li-ion, requiring regulated 1.2 V for MCU core and analog front-end.

IC Role / Device Role / Timing Role: Primary LDO supplying MCU V_DD and sensor bias; enables deep-sleep current <1 µA via CE control.

Use Value: 50 µA quiescent current and auto-discharge prevent battery drain during sleep; ±1.0% output accuracy ensures consistent ADC reference and timing oscillator performance.

Use Scenario: USB 2.0 peripheral (e.g., HID device) deriving 1.2 V rail from 5 V USB bus using upstream DC-DC converter + LDO post-regulation.

IC Role / Device Role / Timing Role: Noise-filtering post-regulator for digital core logic; rejects switching noise from buck converter feeding VIN.

Use Value: 75 dB PSRR at 1 kHz attenuates 100–500 kHz switching artifacts; 0.28 V dropout allows >90% efficiency at light loads while maintaining USB voltage compliance.

Industrial Control Signal Conditioning

Camera Module Power Management

Use Scenario: 4–20 mA loop-powered transmitter with isolated microcontroller requiring precise 1.2 V supply for DAC and op-amp bias.

IC Role / Device Role / Timing Role: Isolated-side LDO delivering accurate, low-noise bias for precision analog circuitry.

Use Value: ±50 mV output tolerance over temperature ensures <0.5% full-scale error in 16-bit DAC output; fold-back protection prevents thermal runaway during field wiring faults.

Use Scenario: Mobile camera module with image sensor and ISP requiring clean 1.2 V core supply synchronized with frame capture timing.

IC Role / Device Role / Timing Role: Dedicated LDO for sensor/ISP core domain, controlled via host processor GPIO to enable/disable per frame burst.

Use Value: Fast output discharge (<100 µs) eliminates voltage hold-up that could cause sensor reset glitches between frames; XDFN4 package fits tight camera flex PCB layouts.

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/TT	150 mA, 1.2 V fixed, 6 µA IQ, no auto-discharge, SOT-23-5 package	Lacks output discharge; higher thermal resistance (R_JA = 238°C/W vs. 350°C/W for XDFN4) limits high-ambient use	Choose for ultra-low-IQ battery life where discharge isn't required and board space allows SOT-23.
Torex XC6210B122MR-G	150 mA, 1.2 V fixed, 25 µA IQ, auto-discharge, SOT-25 package	Slightly higher dropout (0.35 V @ 150 mA); no PSRR spec >100 Hz; smaller 0.6×0.6 mm footprint	Choose for space-constrained designs needing discharge but tolerating lower PSRR and less thermal margin.

Compared with MCP1700T-1202E/TT and XC6210B122MR-G, the NCP4680DMX12TCG provides superior PSRR (75 dB), integrated thermal pad for better power handling in XDFN4, and guaranteed auto-discharge timing - making it optimal for noise-sensitive, thermally constrained, or sequenced-power applications.

Availability

NCP4680DMX12TCG is available at Aetrix Electronics and suitable for battery-powered IoT sensors, USB peripherals, industrial signal conditioners, and camera modules requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.

Supply support for NCP4680DMX12TCG 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 NCP4680 series belongs to onsemi's precision low-noise LDO portfolio, engineered specifically for space- and power-constrained portable electronics requiring high accuracy, fast transient response, and robust protection features.

FAQ

What is the maximum input voltage rating for the NCP4680DMX12TCG?

The NCP4680DMX12TCG has an absolute maximum input voltage of 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 - ensuring proper regulation and thermal safety across all load and temperature conditions for the NCP4680DMX12TCG.

Does the NCP4680DMX12TCG require an external resistor to enable auto-discharge functionality?

No, the NCP4680DMX12TCG integrates the output discharge transistor internally. When the CE pin is driven low, the device automatically activates the VOUT-to-GND switch - no external components are needed. This feature is inherent to the "D" suffix variant and functions reliably across the full operating temperature range of the NCP4680DMX12TCG.

Can the NCP4680DMX12TCG operate stably with a 0.047 µF ceramic output capacitor?

No - the NCP4680DMX12TCG requires a minimum 0.1 µF ceramic output capacitor (X5R/X7R) for guaranteed stability. Using 0.047 µF may cause oscillation or poor transient response. The datasheet explicitly specifies ≥0.1 µF, and layout best practices require placing this capacitor within 2 mm of the VOUT and GND pins for the NCP4680DMX12TCG.

What is the typical dropout voltage of the NCP4680DMX12TCG at 100 mA load current?

At 100 mA load and 25°C, the typical dropout voltage of the NCP4680DMX12TCG is approximately 0.22 V. This value is interpolated from Figure 7 (dropout vs. I_OUT) for the 1.2 V version at 25°C, confirming efficient operation even at moderate loads - critical for extending battery runtime in the NCP4680DMX12TCG's target applications.

Is the NCP4680DMX12TCG pin-compatible with other variants in the NCP4680 family?

Yes - all NCP4680 XDFN4 variants (including NCP4680DMX12TCG, NCP4680DMX18TCG, etc.) share identical pinout, package dimensions, and thermal pad layout. Only the output voltage and marking differ. This allows design reuse across voltage options without PCB changes, provided the application can accommodate the specific fixed output of each NCP4680DMX12TCG variant.

NCP4680DMX12TCG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 4-XFDFN 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):: 0.67V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 70 µA

Current - Supply (Max):: -

PSRR:: 75dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-XDFN (0.8x0.8)

NCP4680DMX12TCG FAQ

1.How can I place an order for NCP4680DMX12TCG through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP4680DMX12TCG 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 NCP4680DMX12TCG reliable?

The price and inventory of NCP4680DMX12TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4680DMX12TCG is usually 5 days.

3.What payment methods are accepted for NCP4680DMX12TCG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4680DMX12TCG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP4680DMX12TCG?

NCP4680DMX12TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP4680DMX12TCG 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 NCP4680DMX12TCG?

For technical support, including NCP4680DMX12TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4680DMX12TCG requirements.

6.How does Aetrix verify that NCP4680DMX12TCG is sourced from the original manufacturer or authorized distributors?

All NCP4680DMX12TCG 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 NCP4680DMX12TCG meets industry standards.

7.What is the process for return or replacement of NCP4680DMX12TCG?

All NCP4680DMX12TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4680DMX12TCG, 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 NCP4680DMX12TCG part is unused and in its original packaging.

Return procedure for NCP4680DMX12TCG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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