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

onsemi NCP580SQ33T1G

Name: NCP580SQ33T1G
Brand: onsemi
SKU: NCP580SQ33T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP580SQ33T1G

Manufacturer:: onsemi

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

Package:: SC-82A, SOT-343

Datasheet:: NCP580SQ33T1G.pdf

Description:: IC REG LINEAR 3.3V 120MA SC82AB

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Product details

Overview

NCP580SQ33T1G from onsemi is a 3.3 V, 120 mA ultra-low-noise CMOS LDO regulator in SC-82AB package, featuring 150 mV dropout at 100 mA, 30 µV_RMS output noise (no bypass cap), and ±1.5% output voltage accuracy-designed for precision power regulation in battery-powered portable instrumentation.

For engineers reviewing the NCP580SQ33T1G datasheet, pinout, applications, or equivalent options, key selection criteria include low quiescent current (90 µA), fast load transient response with 2.2 µF ceramic output capacitor, high PSRR (70 dB @ 1 kHz), and enable-controlled shutdown (0.1 µA).

Technical Context

The NCP580SQ33T1G employs a CMOS pass transistor architecture enabling ultra-low dropout (180 mV typical at 120 mA for 3.3 V output) and minimal quiescent current across input voltages from 2.2 V to 6.0 V. Its internal bandgap reference and error amplifier deliver tight line regulation (0.02%/V) and load regulation (12 mV).

It integrates foldback current limiting and thermal shutdown protection, with CE pin logic compatible to 0 V–V_IN inputs. The device operates over –40°C to +85°C ambient and maintains output voltage temperature coefficient of 100 ppm/°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.3 V ±1.5% - ensures stable rail for 3.3 V microcontrollers and sensors without external trimming.
Max Output Current	120 mA - sufficient to power low-power SoCs, RF transceivers, or sensor signal chains.
Dropout Voltage	180 mV @ 120 mA - enables operation down to 3.48 V input while maintaining regulated 3.3 V output.
Quiescent Current	90 µA @ no load - extends battery life in always-on wearable or IoT edge nodes.
Output Noise	30 µV_RMS (10 Hz–100 kHz, no NR cap) - suitable for noise-sensitive analog circuits like ADC references or audio preamps.
PSRR	70 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input.
Enable Threshold	V_ENH = 1.5 V min, V_ENL = 0.3 V max - compatible with 1.8 V or 3.3 V GPIO control without level-shifting.

Pinout & Package

Package: SC-82AB (Case 419C-02), 4-pin surface-mount, 1.90 mm × 1.30 mm × 0.95 mm profile, Pb-free, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 - Vout	Regulated output terminal	Delivers clean 3.3 V supply; requires ≥2.2 µF ceramic capacitor placed adjacent to pin for stability and transient response.
2 - GND	Power ground reference	Must be connected to low-impedance system ground plane; shared return path for input/output capacitors and load.
3 - CE	Active-high chip enable	Drives internal pass element ON when ≥1.5 V; pulls quiescent current to 0.1 µA when <0.3 V for zero-power standby.
4 - Vin	Input power supply	Accepts 2.2 V–6.0 V; requires 1.0 µF ceramic decoupling capacitor close to pin to suppress high-frequency noise.

Key Features

Feature	Design Value
Ultra-low dropout	180 mV @ 120 mA enables single-cell Li-ion (3.0–4.2 V) or two-cell alkaline operation with full 3.3 V regulation.
Low-noise regulation	30 µV_RMS output noise eliminates need for external noise-reduction capacitor-reducing BOM count and board area.
High PSRR	70 dB @ 1 kHz allows co-location with noisy DC-DC converters without compromising analog signal integrity.
Precision output accuracy	±1.5% over line, load, and temperature ensures reliable operation of 3.3 V I/O interfaces and ADC references.
Thermal & current protection	Foldback current limiting and thermal shutdown prevent damage during overload or ambient overheating conditions.

Applications

Portable Medical Sensors	Wearable Health Monitors
Use Scenario: Continuous glucose monitor (CGM) with integrated ADC and BLE radio operating from coin-cell battery. IC Role / Device Role / Timing Role: Primary 3.3 V power regulator for analog front-end and digital subsystem. Use Value: Ultra-low I_Q (90 µA) extends battery life beyond 6 months; low noise preserves ADC SNR without added filtering.	Use Scenario: Optical heart-rate sensor module in smartwatch with motion-compensated PPG processing. IC Role / Device Role / Timing Role: Clean 3.3 V supply for photodiode amplifier and DSP core. Use Value: 30 µV_RMS noise prevents baseline drift in optical signal chain; fast load transient response handles burst-mode LED driving.
Industrial Handheld Scanners	Low-Power IoT Edge Nodes
Use Scenario: Rugged barcode scanner powered by rechargeable Li-Polymer battery with cold-temperature operation requirement. IC Role / Device Role / Timing Role: Main system LDO delivering regulated 3.3 V to image sensor, MCU, and interface logic. Use Value: –40°C to +85°C operation range and 100 ppm/°C tempco ensure consistent voltage across environmental extremes.	Use Scenario: Battery-operated environmental sensor node transmitting temperature/humidity data via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Enable-controlled power source for microcontroller and radio during active transmission bursts. Use Value: 0.1 µA shutdown current minimizes leakage during 14.75-minute sleep cycles; SC-82AB footprint saves PCB space in compact enclosure.

Portable Medical Sensors

Wearable Health Monitors

Use Scenario: Continuous glucose monitor (CGM) with integrated ADC and BLE radio operating from coin-cell battery.

IC Role / Device Role / Timing Role: Primary 3.3 V power regulator for analog front-end and digital subsystem.

Use Value: Ultra-low I_Q (90 µA) extends battery life beyond 6 months; low noise preserves ADC SNR without added filtering.

Use Scenario: Optical heart-rate sensor module in smartwatch with motion-compensated PPG processing.

IC Role / Device Role / Timing Role: Clean 3.3 V supply for photodiode amplifier and DSP core.

Use Value: 30 µV_RMS noise prevents baseline drift in optical signal chain; fast load transient response handles burst-mode LED driving.

Industrial Handheld Scanners

Low-Power IoT Edge Nodes

Use Scenario: Rugged barcode scanner powered by rechargeable Li-Polymer battery with cold-temperature operation requirement.

IC Role / Device Role / Timing Role: Main system LDO delivering regulated 3.3 V to image sensor, MCU, and interface logic.

Use Value: –40°C to +85°C operation range and 100 ppm/°C tempco ensure consistent voltage across environmental extremes.

Use Scenario: Battery-operated environmental sensor node transmitting temperature/humidity data via LoRaWAN every 15 minutes.

IC Role / Device Role / Timing Role: Enable-controlled power source for microcontroller and radio during active transmission bursts.

Use Value: 0.1 µA shutdown current minimizes leakage during 14.75-minute sleep cycles; SC-82AB footprint saves PCB space in compact enclosure.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3302E/TO	300 mA rated, higher I_Q (2.0 µA typ), no enable pin, TO-92 package	Larger through-hole footprint; lacks enable control for deep-sleep sequencing	Choose for cost-sensitive, non-battery-critical applications where enable and ultra-low I_Q are not required.
Torex XC6206P332MR-G	150 mA rated, 1.0 µA I_Q, no enable, SOT-23-3 package (3-pin)	Missing CE pin limits power-state control; smaller package but no shutdown mode	Choose when board space is critical and system-level enable is handled externally or not needed.

Compared with MCP1700-3302E/TO and XC6206P332MR-G, the NCP580SQ33T1G uniquely combines 120 mA capability, 90 µA quiescent current, active-high enable, and ultra-low noise in a 4-pin SC-82AB package-making it optimal for compact, battery-constrained systems requiring precise, controllable, low-noise regulation.

Availability

NCP580SQ33T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, industrial handheld scanners, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term sourcing.

Supply support for NCP580SQ33T1G 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, serving automotive, industrial, cloud, medical, and IoT markets with discrete, analog, and embedded solutions.

The NCP580 series belongs to onsemi's precision low-dropout regulator product line, engineered specifically for battery-powered portable equipment demanding ultra-low noise, low I_Q, and high accuracy under dynamic load conditions.

FAQ

What is the maximum input voltage rating for the NCP580SQ33T1G?

The NCP580SQ33T1G has an absolute maximum input voltage (V_IN) of 6.5 V. The recommended operating input range is 2.2 V to 6.0 V. Exceeding 6.5 V may cause permanent damage. For reliable 3.3 V output regulation, minimum input must be ≥3.48 V (3.3 V + 180 mV dropout) at full 120 mA load.

Does the NCP580SQ33T1G require an external noise-reduction capacitor?

No, the NCP580SQ33T1G delivers 30 µV_RMS output noise (10 Hz–100 kHz) without any external noise-reduction capacitor. This eliminates the need for a dedicated NR pin or additional 10 nF–100 nF capacitor, simplifying layout and reducing BOM cost-unlike many competing LDOs that mandate external NR caps for low-noise performance.

What is the shutdown current of the NCP580SQ33T1G when the CE pin is low?

When the CE pin is driven below 0.3 V (logic low), the NCP580SQ33T1G enters shutdown mode with a typical current draw of 0.1 µA and maximum of 1.0 µA. This ultra-low shutdown current is critical for extending battery life in intermittently active devices such as wireless sensors and wearables.

Can the NCP580SQ33T1G be used with ceramic output capacitors?

Yes-the NCP580SQ33T1G is explicitly designed for use with ceramic output capacitors ≥2.2 µF. Its internal compensation is optimized for low-ESR ceramics, ensuring stability and fast transient response. Tantalum or aluminum electrolytic capacitors are not recommended due to higher ESR and potential instability.

What package type and dimensions does the NCP580SQ33T1G use?

The NCP580SQ33T1G uses the SC-82AB package (Case 419C-02): a 4-pin, Pb-free, surface-mount package measuring 1.90 mm × 1.30 mm × 0.95 mm. Pin pitch is 0.65 mm, and the body thickness is specified up to 0.95 mm with 0.05 mm mold flash allowance-compatible with standard reflow profiles and automated assembly.

NCP580SQ33T1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-82A, SOT-343

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.28V @ 120mA

Current - Output:: 120mA

Current - Quiescent (Iq):: 160 µA

Current - Supply (Max):: -

PSRR:: 70dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-82AB

NCP580SQ33T1G FAQ

1.How can I place an order for NCP580SQ33T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP580SQ33T1G 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 NCP580SQ33T1G reliable?

The price and inventory of NCP580SQ33T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP580SQ33T1G is usually 5 days.

3.What payment methods are accepted for NCP580SQ33T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP580SQ33T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP580SQ33T1G?

NCP580SQ33T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP580SQ33T1G 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 NCP580SQ33T1G?

For technical support, including NCP580SQ33T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP580SQ33T1G requirements.

6.How does Aetrix verify that NCP580SQ33T1G is sourced from the original manufacturer or authorized distributors?

All NCP580SQ33T1G 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 NCP580SQ33T1G meets industry standards.

7.What is the process for return or replacement of NCP580SQ33T1G?

All NCP580SQ33T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP580SQ33T1G, 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 NCP580SQ33T1G part is unused and in its original packaging.

Return procedure for NCP580SQ33T1G:

1.Submit a request within 90 days.

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

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