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

onsemi NCP612SQ28T2G

Name: NCP612SQ28T2G
Brand: onsemi
SKU: NCP612SQ28T2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP612SQ28T2G

Manufacturer:: onsemi

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

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: NCP612SQ28T2G.pdf

Description:: IC REG LINEAR 2.8V 100MA SC88A

Quantity:: RFQ Add To RFQ list

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Inventory:4,232

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Product details

Overview

NCP612SQ28T2G from onsemi is a fixed-output CMOS low-dropout linear voltage regulator delivering 2.8 V at up to 100 mA, featuring 40 µA typical quiescent current, 250 mV dropout at 100 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring stable low-power biasing.

For engineers reviewing the NCP612SQ28T2G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low I_Q, SC70-5 footprint compatibility, enable-controlled standby, ceramic capacitor stability, and −40 °C to +85 °C industrial temperature operation.

Technical Context

The NCP612SQ28T2G integrates a PMOS pass transistor with internal voltage reference, error amplifier, and protection circuitry (current limit, thermal shutdown). It operates without minimum load requirement and remains stable with ceramic output capacitors as low as 1.0 µF.

Its enable input supports logic-level control (V_TH(en) = 0.95 V high, 0.3 V low), and ground current scales linearly with load (40 µA at 1 mA, ≤90 µA at 100 mA), enabling precise power budgeting in always-on subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8 V ±2.0% over −40 °C to +85 °C and 1–100 mA load - ensures consistent MCU core or sensor bias under varying conditions.
Dropout Voltage	250 mV typical at 100 mA - enables regulation from 3.05 V input, extending usable battery life in single-cell Li-ion or alkaline systems.
Quiescent Current	40 µA typical (I_Q) with EN = V_IN; 0.03 µA in shutdown - minimizes standby drain in wake-on-event architectures.
Input Voltage Range	0 to 6.0 V - supports direct connection to unregulated battery rails or intermediate DC/DC outputs.
Thermal Protection	Internal shutdown at ~160 °C - prevents latch-up or permanent damage during transient overload or poor PCB thermal design.
Output Noise	100 µV_RMS (100 Hz–100 kHz) - suitable for noise-sensitive analog sensors and RF front-end biasing.
Line Regulation	1.0–3.0 mV/V - maintains tight output stability despite input ripple from switching converters or battery sag.

Pinout & Package

Housed in the SC70-5 (SOT-353) surface-mount package (Case 419A), the NCP612SQ28T2G uses a 5-pin micro-miniature footprint with 0.65 mm pitch and exposed pad not electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
1	Vin	Positive input supply rail - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin.
2	Gnd	Power ground reference - requires low-impedance PCB trace to minimize noise coupling into regulation loop.
3	Enable	Active-high digital control input - pulls device into <1 µA shutdown when driven <0.3 V; connect to Vin if unused.
4	N/C	No internal connection - left floating; no PCB trace or solder mask required.
5	Vout	Regulated 2.8 V output - drives load directly; requires ≥1.0 µF ceramic output capacitor for stability and transient response.

Key Features

Feature	Design Value
Ultra-low quiescent current	40 µA typical operating I_Q enables >1-year battery life in IoT endpoint sleep modes.
Ceramic-capacitor compatible	Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or high-ESR capacitors.
Enable-controlled shutdown	Reduces total system current to <1 µA - supports host-processor–managed power sequencing.
Pb-free SC70-5 package	RoHS-compliant 1.25 × 2.1 mm footprint - fits high-density portable PCB layouts with minimal board area.
±2.0% output accuracy	Tight initial tolerance reduces need for post-production calibration in precision analog signal chains.

Applications

Wearable Health Monitor	Smart Sensor Node
Use Scenario: Continuous ECG/PPG sensing powered by coin cell or rechargeable LiPo. IC Role / Device Role / Timing Role: Provides clean, low-noise 2.8 V bias to analog front-end and ADC while minimizing standby current. Use Value: Enables >6-month runtime on CR2032 via 40 µA I_Q and enables fast wake-from-sleep via enable pin control.	Use Scenario: Battery-operated environmental sensor (temp/humidity/pressure) transmitting via BLE. IC Role / Device Role / Timing Role: Supplies regulated 2.8 V to MEMS sensor and BLE SoC during active measurement and radio burst. Use Value: Maintains 2.8 V ±2% across battery discharge (3.6 V → 2.8 V), ensuring sensor linearity and BLE RF stability.
Industrial Handheld Scanner	Portable Medical Diagnostic Tool
Use Scenario: Rugged barcode scanner using single-cell Li-ion with intermittent high-current laser/decoder bursts. IC Role / Device Role / Timing Role: Delivers stable 2.8 V to decoder ASIC and imager during 100 mA peak loads. Use Value: 250 mV dropout allows full 2.8 V output down to 3.05 V input - extends usable battery range by ~12% vs. higher-dropout regulators.	Use Scenario: Portable ultrasound probe or glucose meter requiring FDA-aligned reliability and low EMI. IC Role / Device Role / Timing Role: Powers analog signal conditioning and low-power microcontroller with low 100 µV_RMS noise. Use Value: Meets IEC 60601-1 EMI limits without added ferrite beads due to inherent low-noise design and ceramic stability.

Wearable Health Monitor

Smart Sensor Node

Use Scenario: Continuous ECG/PPG sensing powered by coin cell or rechargeable LiPo.

IC Role / Device Role / Timing Role: Provides clean, low-noise 2.8 V bias to analog front-end and ADC while minimizing standby current.

Use Value: Enables >6-month runtime on CR2032 via 40 µA I_Q and enables fast wake-from-sleep via enable pin control.

Use Scenario: Battery-operated environmental sensor (temp/humidity/pressure) transmitting via BLE.

IC Role / Device Role / Timing Role: Supplies regulated 2.8 V to MEMS sensor and BLE SoC during active measurement and radio burst.

Use Value: Maintains 2.8 V ±2% across battery discharge (3.6 V → 2.8 V), ensuring sensor linearity and BLE RF stability.

Industrial Handheld Scanner

Portable Medical Diagnostic Tool

Use Scenario: Rugged barcode scanner using single-cell Li-ion with intermittent high-current laser/decoder bursts.

IC Role / Device Role / Timing Role: Delivers stable 2.8 V to decoder ASIC and imager during 100 mA peak loads.

Use Value: 250 mV dropout allows full 2.8 V output down to 3.05 V input - extends usable battery range by ~12% vs. higher-dropout regulators.

Use Scenario: Portable ultrasound probe or glucose meter requiring FDA-aligned reliability and low EMI.

IC Role / Device Role / Timing Role: Powers analog signal conditioning and low-power microcontroller with low 100 µV_RMS noise.

Use Value: Meets IEC 60601-1 EMI limits without added ferrite beads due to inherent low-noise design and ceramic stability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2802E/TT	300 mV dropout at 100 mA; 1.8 µA typical I_Q; SOT-23-3 package (no enable).	Lacks enable pin and SC70-5 footprint - requires layout change and adds external logic for shutdown control.	Select only if ultra-low I_Q dominates over footprint and controllability requirements.
TPS7A0528PDBVR	175 mV dropout at 100 mA; 25 µA I_Q; 5-pin SOT-23 with enable; AEC-Q100 Grade 2.	Automotive-qualified with tighter temp range (−40 °C to +125 °C); higher cost and larger footprint than SC70-5.	Prefer for automotive-grade designs where extended temperature and qualification outweigh size constraints.

Compared with MCP1700T-2802E/TT and TPS7A0528PDBVR, the NCP612SQ28T2G offers optimal balance of SC70-5 miniaturization, enable functionality, and 250 mV dropout - making it ideal for space-constrained consumer and industrial portables where AEC-Q100 is not mandated.

Availability

NCP612SQ28T2G is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, and industrial handheld scanners requiring stable component supply, long-lifecycle support, and RoHS-compliant micro-packages.

Supply support for NCP612SQ28T2G 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 specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.

The NCP612 series targets portable and battery-powered applications demanding ultra-low quiescent current, small footprint, and ceramic capacitor compatibility - aligning with onsemi's focus on power efficiency in edge devices.

FAQ

What is the maximum input voltage rating for the NCP612SQ28T2G?

The NCP612SQ28T2G has an absolute maximum input voltage of 6.0 V. Exceeding this rating may cause permanent damage. For reliable operation, maintain Vin within 0 to 6.0 V, with recommended headroom of ≥0.25 V above Vout (i.e., ≥3.05 V) to ensure regulation across temperature and load. The device's 250 mV dropout at 100 mA defines its minimum functional Vin under full load.

Does the NCP612SQ28T2G require an external pull-up resistor on the Enable pin?

No, the NCP612SQ28T2G does not require an external pull-up on the Enable pin. When unused, the Enable pin must be connected directly to Vin to guarantee normal operation. The internal circuitry does not provide pull-up; leaving Enable floating risks undefined behavior or unintended shutdown. If controlled by a microcontroller GPIO, ensure drive strength meets the input leakage specification (<100 nA).

Can the NCP612SQ28T2G operate with a 1.0 µF ceramic output capacitor?

Yes, the NCP612SQ28T2G is explicitly designed and characterized for stability with a 1.0 µF ceramic output capacitor (X5R/X7R dielectric), as confirmed in the datasheet's Applications Information section. Larger values improve load transient response and noise rejection but are not required for basic stability. Avoid high-ESR capacitors like standard aluminum electrolytics.

Is the NCP612SQ28T2G pin-compatible with other variants in the NCP612 family?

Yes, all NCP612xxT2G variants (e.g., NCP612SQ15T2G, NCP612SQ33T2G) share identical SC70-5 pinout, package dimensions, and terminal functions. Only the output voltage and marking code differ. This allows drop-in replacement across voltages in existing layouts - provided input voltage headroom and load requirements remain compatible with the new Vout.

What is the thermal shutdown threshold of the NCP612SQ28T2G?

The NCP612SQ28T2G features internal thermal protection that activates at approximately 160 °C junction temperature, disabling the output until the die cools below the hysteresis threshold (~140 °C). This safeguard prevents catastrophic failure during sustained overload or inadequate PCB copper pour. Maximum continuous power dissipation depends on ambient temperature and PCB thermal design - e.g., 330 mW at 25 °C with optimal layout.

NCP612SQ28T2G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

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):: 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.38V @ 100mA

Current - Output:: 100mA

Current - Quiescent (Iq):: 90 µA

Current - Supply (Max):: 90 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-88A (SC-70-5/SOT-353)

NCP612SQ28T2G FAQ

1.How can I place an order for NCP612SQ28T2G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP612SQ28T2G 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 NCP612SQ28T2G reliable?

The price and inventory of NCP612SQ28T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ28T2G is usually 5 days.

3.What payment methods are accepted for NCP612SQ28T2G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ28T2G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP612SQ28T2G?

NCP612SQ28T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP612SQ28T2G 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 NCP612SQ28T2G?

For technical support, including NCP612SQ28T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ28T2G requirements.

6.How does Aetrix verify that NCP612SQ28T2G is sourced from the original manufacturer or authorized distributors?

All NCP612SQ28T2G 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 NCP612SQ28T2G meets industry standards.

7.What is the process for return or replacement of NCP612SQ28T2G?

All NCP612SQ28T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ28T2G, 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 NCP612SQ28T2G part is unused and in its original packaging.

Return procedure for NCP612SQ28T2G:

1.Submit a request within 90 days.

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

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