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

onsemi NCP662SQ33T1G

Name: NCP662SQ33T1G
Brand: onsemi
SKU: NCP662SQ33T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP662SQ33T1G

Manufacturer:: onsemi

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

Package:: SC-82A, SOT-343

Datasheet:: NCP662SQ33T1G.pdf

Description:: IC REG LINEAR 3.3V 100MA SC82AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NCP662SQ33T1G from onsemi is a fixed-output, 3.3 V, 100 mA CMOS low-dropout linear regulator with ultra-low quiescent current (2.5 µA typical), enable control, and ±2.0% output voltage accuracy over −40 °C to +85 °C. It uses a PMOS pass transistor, supports ceramic output capacitors as low as 0.1 µF, and is designed for battery-powered portable electronics requiring standby power efficiency.

For engineers reviewing the NCP662SQ33T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 100 mA (230 mV max), thermal shutdown protection, SC-82AB package footprint, and enable threshold compatibility with standard logic levels.

Technical Context

The NCP662SQ33T1G integrates a precision voltage reference, error amplifier, and PMOS power transistor in a single die. Its enable input (Pin 4) provides active-high ON/OFF control with defined turn-on/turn-off thresholds (1.3 V min / 0.5 V max), and it features internal current limit and thermal shutdown circuits triggered at ~160 °C.

Designed for stability with low-ESR ceramic capacitors, the regulator maintains regulation across input voltages from 3.6 V to 6.0 V (for 3.3 V output), exhibits 20 mV load regulation (10–100 mA), and delivers 100 µV_RMS output noise (100 Hz–100 kHz) - critical for noise-sensitive analog and RF subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.3 V ±2.0% (ensures stable supply for 3.3 V microcontrollers and sensors)
Max Output Current	100 mA (supports low-power SoCs, Bluetooth modules, and sensor nodes)
Quiescent Current	2.5 µA typical (enables multi-year battery life in always-on IoT endpoints)
Dropout Voltage	230 mV max at 100 mA (allows operation down to Vin = 3.53 V while maintaining 3.3 V out)
Input Voltage Range	3.6 V to 6.0 V (compatible with single-cell Li-ion, Li-poly, or dual-cell alkaline inputs)
Operating Temp	−40 °C to +85 °C (suitable for industrial and consumer-grade portable equipment)
Enable Threshold	V_EN(HI) ≥ 1.3 V, V_EN(LO) ≤ 0.5 V (directly compatible with 1.8 V/3.3 V GPIO without level-shifting)

Pinout & Package

The NCP662SQ33T1G is housed in the SC-82AB (Case 419C) surface-mount package - a 4-pin, 2.0 × 1.25 mm micro-miniature outline with 0.65 mm pitch and exposed thermal pad (not electrically connected).

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Power ground reference; must be connected to low-impedance PCB ground plane for noise immunity and thermal conduction
2	Vin	Unregulated input supply; requires local 1.0 µF decoupling capacitor placed within 2 mm of pin
3	Vout	Regulated 3.3 V output; minimum 0.1 µF ceramic capacitor required; larger values improve transient response
4	Enable	Active-high digital control input; connect to Vin for always-on operation or to MCU GPIO for dynamic power gating

Key Features

Feature	Design Value
Ultra-low I_Q	2.5 µA typical enables >10-year battery life in coin-cell-powered devices (e.g., BLE beacons)
PMOS Pass Transistor	Eliminates reverse-current path; prevents backfeed from Vout to Vin during shutdown or input brownout
Thermal Shutdown	Activates at ~160 °C junction temperature to prevent permanent damage during sustained overload or poor heatsinking
Ceramic-Cap Stable	No ESR requirement allows use of low-cost, small-footprint X5R/X7R MLCCs instead of bulkier tantalum or aluminum electrolytics
±2.0% Output Accuracy	Guarantees 3.234–3.366 V output across full temp/load range - sufficient for 3.3 V I/O tolerance of modern MCUs

Applications

Wearable Health Monitor	Industrial Sensor Node
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell with 10-year target lifetime. IC Role / Device Role / Timing Role: Primary 3.3 V supply for ultra-low-power MCU, analog front-end, and BLE radio during active and deep-sleep modes. Use Value: 2.5 µA quiescent current directly extends battery life; enable pin synchronizes power with measurement cycles to eliminate idle drain.	Use Scenario: Wireless vibration/temperature node mounted on factory machinery, operating unattended for 5+ years. IC Role / Device Role / Timing Role: Regulates power for MEMS accelerometer, ultra-low-power MCU, and sub-GHz RF transceiver in intermittent wake-up mode. Use Value: 230 mV dropout ensures reliable operation as primary battery voltage declines from 4.2 V to 3.53 V; thermal shutdown protects against enclosure overheating.
Portable Barcode Scanner	Automotive Cabin Camera Module
Use Scenario: Handheld scanner using single-cell Li-ion (3.0–4.2 V) with frequent short-duration active bursts. IC Role / Device Role / Timing Role: Provides clean, low-noise 3.3 V rail for image sensor, laser driver, and decoding ASIC during scan events. Use Value: 100 µV_RMS output noise prevents corruption of analog pixel data; fast load transient response minimizes voltage sag during laser pulse activation.	Use Scenario: AEC-Q100-compliant cabin-facing camera in automotive infotainment system with cold-crank tolerance. IC Role / Device Role / Timing Role: Secondary LDO supplying 3.3 V to image signal processor and MIPI interface, downstream of main buck converter. Use Value: While NCP662SQ33T1G itself is commercial-grade, its pinout and electrical behavior match AEC-Q100-qualified NCV662SQ33T1G*, enabling drop-in qualification upgrade paths.

Wearable Health Monitor

Industrial Sensor Node

Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell with 10-year target lifetime.

IC Role / Device Role / Timing Role: Primary 3.3 V supply for ultra-low-power MCU, analog front-end, and BLE radio during active and deep-sleep modes.

Use Value: 2.5 µA quiescent current directly extends battery life; enable pin synchronizes power with measurement cycles to eliminate idle drain.

Use Scenario: Wireless vibration/temperature node mounted on factory machinery, operating unattended for 5+ years.

IC Role / Device Role / Timing Role: Regulates power for MEMS accelerometer, ultra-low-power MCU, and sub-GHz RF transceiver in intermittent wake-up mode.

Use Value: 230 mV dropout ensures reliable operation as primary battery voltage declines from 4.2 V to 3.53 V; thermal shutdown protects against enclosure overheating.

Portable Barcode Scanner

Automotive Cabin Camera Module

Use Scenario: Handheld scanner using single-cell Li-ion (3.0–4.2 V) with frequent short-duration active bursts.

IC Role / Device Role / Timing Role: Provides clean, low-noise 3.3 V rail for image sensor, laser driver, and decoding ASIC during scan events.

Use Value: 100 µV_RMS output noise prevents corruption of analog pixel data; fast load transient response minimizes voltage sag during laser pulse activation.

Use Scenario: AEC-Q100-compliant cabin-facing camera in automotive infotainment system with cold-crank tolerance.

IC Role / Device Role / Timing Role: Secondary LDO supplying 3.3 V to image signal processor and MIPI interface, downstream of main buck converter.

Use Value: While NCP662SQ33T1G itself is commercial-grade, its pinout and electrical behavior match AEC-Q100-qualified NCV662SQ33T1G*, enabling drop-in qualification upgrade paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-3302E/MB	Same 3.3 V output, 250 mA rating, but higher I_Q (1.6 µA typical); no enable pin; SOT-23-3 package	Lacks ON/OFF control; unsuitable where dynamic power gating is required	Select only if enable functionality is unnecessary and higher output current margin is needed
TPS7A0533PDBVR	3.3 V, 200 mA, 250 nA I_Q, enable pin, but requires minimum 1 µF output capacitor and has 400 mV dropout at 100 mA	Lower I_Q benefits extreme ultra-low-power designs; higher dropout limits low-Vin operation	Prefer when nanoscale I_Q dominates design priority and input voltage remains ≥4.0 V

Compared with MCP1700T-3302E/MB and TPS7A0533PDBVR, the NCP662SQ33T1G uniquely balances ultra-low I_Q, integrated enable, low dropout, and minimal capacitor requirements - making it optimal for space-constrained, battery-operated systems needing precise 3.3 V regulation with active power management.

Availability

NCP662SQ33T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial wireless sensor nodes, portable barcode scanners, and automotive cabin camera modules requiring stable component supply and long-term manufacturability.

Supply support for NCP662SQ33T1G 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 intelligent edge applications.

The NCP662SQ33T1G belongs to onsemi's NCP662/NCP663 family of ultra-low-I_Q LDOs, engineered specifically for portable battery-powered equipment where extended runtime and compact form factor are critical.

FAQ

What is the maximum input voltage for the NCP662SQ33T1G?

The NCP662SQ33T1G supports a maximum input voltage of 6.0 V. This rating applies across the full operating temperature range (−40 °C to +85 °C) and ensures safe operation when used with common battery sources such as single-cell Li-ion (up to 4.2 V) or dual-cell alkaline (up to 3.2 V), with headroom for transient spikes. Exceeding 6.0 V may damage the device.

Does the NCP662SQ33T1G require an external pull-up resistor on the Enable pin?

No, the NCP662SQ33T1G does not require an external pull-up resistor on the Enable pin. If enable functionality is unused, the datasheet specifies connecting Pin 4 directly to Vin to ensure the device remains enabled. The internal circuitry is designed for direct connection to Vin or a logic-level GPIO without external biasing components.

What is the minimum output capacitor required for stable operation of the NCP662SQ33T1G?

The NCP662SQ33T1G requires a minimum output capacitor of 0.1 µF, and it is explicitly characterized for stability with low-ESR ceramic capacitors. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection, but the 0.1 µF minimum enables ultra-compact designs in space-constrained applications like wearables and hearing aids.

Is the NCP662SQ33T1G pin-compatible with the NCV662SQ33T1G* automotive variant?

Yes, the NCP662SQ33T1G and NCV662SQ33T1G* share identical pinout, package (SC-82AB), and electrical behavior for all shared specifications. The NCV version adds AEC-Q100 qualification and extended temperature range (−40 °C to +125 °C), but both use the same Enable pin function, dropout characteristics, and quiescent current profile - enabling direct hardware reuse with qualification upgrades.

Can the NCP662SQ33T1G be used with a 3.6 V input to deliver regulated 3.3 V at 100 mA?

Yes, the NCP662SQ33T1G can deliver 3.3 V at 100 mA with a 3.6 V input. Its maximum dropout voltage at 100 mA is 230 mV, so the minimum required input is 3.3 V + 0.23 V = 3.53 V. At 3.6 V input, the device operates with 70 mV headroom - well within specification and ensuring stable regulation even under worst-case temperature and process variation.

NCP662SQ33T1G 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):: 0.42V @ 100mA

Current - Output:: 100mA

Current - Quiescent (Iq):: 1 µA

Current - Supply (Max):: 6 µA

PSRR:: -

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-82AB

NCP662SQ33T1G FAQ

1.How can I place an order for NCP662SQ33T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP662SQ33T1G 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 NCP662SQ33T1G reliable?

The price and inventory of NCP662SQ33T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP662SQ33T1G is usually 5 days.

3.What payment methods are accepted for NCP662SQ33T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP662SQ33T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP662SQ33T1G?

NCP662SQ33T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP662SQ33T1G 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 NCP662SQ33T1G?

For technical support, including NCP662SQ33T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP662SQ33T1G requirements.

6.How does Aetrix verify that NCP662SQ33T1G is sourced from the original manufacturer or authorized distributors?

All NCP662SQ33T1G 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 NCP662SQ33T1G meets industry standards.

7.What is the process for return or replacement of NCP662SQ33T1G?

All NCP662SQ33T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP662SQ33T1G, 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 NCP662SQ33T1G part is unused and in its original packaging.

Return procedure for NCP662SQ33T1G:

1.Submit a request within 90 days.

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

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