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

onsemi NCP612SQ28T1

Name: NCP612SQ28T1
Brand: onsemi
SKU: NCP612SQ28T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP612SQ28T1

Manufacturer:: onsemi

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

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

Datasheet:: NCP612SQ28T1.pdf

Description:: IC REG LINEAR 2.8V 100MA SC88A

Quantity:: RFQ Add To RFQ list

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Inventory:3,250

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Product details

Overview

NCP612SQ28T1 from onsemi is a 2.8 V fixed-output, 100 mA CMOS low-dropout linear regulator in SC70−5 package, featuring 40 µA typical quiescent current, 250 mV dropout at 100 mA, and ±2.0% output voltage accuracy over −40°C to +85°C - designed for battery-powered portable electronics requiring ultra-low standby power.

For engineers reviewing the NCP612SQ28T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, thermal performance in SC70−5, enable threshold compatibility with 1.8 V/3.3 V logic, and ceramic capacitor stability without ESR constraints.

Technical Context

The NCP612SQ28T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal protection circuits (current limit, thermal shutdown). It operates as a single-stage LDO with no external feedback network required due to factory-trimmed fixed 2.8 V output.

Its enable input supports active-high logic control with 0.3 V (low) / 0.95 V (high) thresholds, and it maintains regulation down to 2.8 V + 250 mV input - enabling use with Li-ion cells down to ~3.05 V under full 100 mA load.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.8 V ±2.0% (10 mA to 100 mA, −40°C to +85°C), enabling stable supply for 2.8 V I/O rails or low-voltage microcontrollers.
Dropout Voltage	250 mV at 100 mA (2.8 V output), allowing operation from 3.05 V input - critical for single-cell Li-ion or alkaline systems.
Quiescent Current	40 µA typical (I_OUT = 1–100 mA), minimizing battery drain during sleep mode in portable devices.
Enable Threshold	V_TH(HI) = 0.95 V, V_TH(LO) = 0.3 V - compatible with 1.8 V GPIO without level-shifting.
Thermal Protection	Internal shutdown at ~160°C junction temperature, preventing damage during sustained overload or poor PCB thermal design.
Capacitor Compatibility	Stable with 1.0 µF ceramic output capacitor (no ESR minimum), reducing BOM cost and board area vs. tantalum alternatives.
Operating Temperature	−40°C to +85°C ambient (NCP612 grade), validated for consumer handheld and industrial edge sensor applications.

Pinout & Package

Package: SC70−5 (Case 419A−02), 1.8 × 1.15 × 0.9 mm body, 0.65 mm lead pitch, surface-mount, Pb-free compatible.

Pin/Terminal	Circuit Role	Design Meaning
1	Vin	Positive input supply - must be ≥ (2.8 V + dropout) and ≤ 6.0 V; requires local 1.0 µF decoupling.
2	Gnd	Power ground reference - low-impedance connection essential for noise immunity and thermal dissipation.
3	Enable	Active-high digital control - pull high to Vin for regulation; pull low (<0.3 V) to disable output and reduce I_Q to <0.03 µA.
4	N/C	No internal connection - must remain unconnected; not usable as thermal pad or auxiliary terminal.
5	Vout	Regulated 2.8 V output - drives load directly; requires 1.0 µF ceramic capacitor placed adjacent to pin.

Key Features

Feature	Design Value
Ultra-low quiescent current	40 µA typical enables >1-year battery life in always-on IoT sensors drawing 10 µA average.
Low dropout architecture	PMOS pass element eliminates base drive loss, achieving 250 mV dropout at 100 mA - superior to NMOS-based LDOs.
Fixed 2.8 V output	Factory-trimmed resistor network ensures ±2.0% accuracy without external components - reduces layout complexity and test time.
Enable-controlled shutdown	Logic-compatible enable pin reduces system-level power by >99% when inactive, supporting deep-sleep MCU modes.
Ceramic capacitor stability	Zero ESR requirement allows use of low-cost, small-footprint X5R/X7R MLCCs - eliminating need for larger, higher-ESR tantalum parts.

Applications

Wearable Health Monitor	Bluetooth LE Sensor Node
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Primary 2.8 V supply for analog front-end and BLE SoC during active sensing and radio transmission. Use Value: 40 µA quiescent current extends coin-cell life beyond 2 years; 250 mV dropout sustains regulation as battery discharges from 3.3 V to 3.05 V.	Use Scenario: Intermittent temperature/humidity logging with BLE advertisement bursts. IC Role / Device Role / Timing Role: Regulated 2.8 V rail for sensor IC and BLE transceiver during 100 ms active windows. Use Value: Enable pin synchronizes power delivery to MCU wake-up events, eliminating leakage through idle peripherals.
Industrial Handheld Scanner	Smart Home Remote Control
Use Scenario: Laser barcode scanning with brief high-current pulses (80 mA peak). IC Role / Device Role / Timing Role: Stable 2.8 V supply for laser diode driver and image sensor interface during scan trigger. Use Value: Low output impedance and fast load transient response (<100 µs recovery) prevent voltage sag that could corrupt image capture.	Use Scenario: RF remote with multi-button matrix and LED feedback, powered by two AA alkalines. IC Role / Device Role / Timing Role: Main 2.8 V supply for RF transceiver and touch controller during button press and transmit. Use Value: SC70−5 footprint minimizes PCB area in space-constrained remote housing; ±2.0% accuracy ensures reliable RF modulation.

Wearable Health Monitor

Bluetooth LE Sensor Node

Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery.

IC Role / Device Role / Timing Role: Primary 2.8 V supply for analog front-end and BLE SoC during active sensing and radio transmission.

Use Value: 40 µA quiescent current extends coin-cell life beyond 2 years; 250 mV dropout sustains regulation as battery discharges from 3.3 V to 3.05 V.

Use Scenario: Intermittent temperature/humidity logging with BLE advertisement bursts.

IC Role / Device Role / Timing Role: Regulated 2.8 V rail for sensor IC and BLE transceiver during 100 ms active windows.

Use Value: Enable pin synchronizes power delivery to MCU wake-up events, eliminating leakage through idle peripherals.

Industrial Handheld Scanner

Smart Home Remote Control

Use Scenario: Laser barcode scanning with brief high-current pulses (80 mA peak).

IC Role / Device Role / Timing Role: Stable 2.8 V supply for laser diode driver and image sensor interface during scan trigger.

Use Value: Low output impedance and fast load transient response (<100 µs recovery) prevent voltage sag that could corrupt image capture.

Use Scenario: RF remote with multi-button matrix and LED feedback, powered by two AA alkalines.

IC Role / Device Role / Timing Role: Main 2.8 V supply for RF transceiver and touch controller during button press and transmit.

Use Value: SC70−5 footprint minimizes PCB area in space-constrained remote housing; ±2.0% accuracy ensures reliable RF modulation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-I_Q LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2802E/MB	250 mV dropout at 250 mA, 1.6 µA I_Q, SOT-23-5 package - lower quiescent but higher dropout at 100 mA (280 mV).	Preferred for sub-µA sleep systems; less suitable for high-pulse-load apps due to higher thermal resistance in SOT-23 vs. SC70−5.	Select if system prioritizes lowest possible I_Q over pulse-load headroom.
Torex XC6206P282MR-G	200 mV dropout at 100 mA, 1 µA I_Q, SOT-25 package - tighter 1.0% accuracy but limited 80 mA output current.	Better for ultra-low-power always-on nodes; insufficient for 100 mA peak loads like scanner lasers or camera modules.	Select if load never exceeds 80 mA and ±1.0% accuracy is mandatory.

Compared with MCP1700T-2802E/MB and XC6206P282MR-G, the NCP612SQ28T1 delivers optimal balance of 100 mA capability, 250 mV dropout, and 40 µA I_Q in the smallest footprint - making it ideal for compact, battery-critical designs where both continuous and pulsed loads occur.

Availability

NCP612SQ28T1 is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and smart home remote controls requiring stable component supply across production volumes.

Supply support for NCP612SQ28T1 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, and sensor solutions for automotive, industrial, and portable electronics.

The NCP612SQ28T1 belongs to onsemi's NCP612 series of ultra-low-I_Q LDOs, engineered specifically for battery-powered handheld equipment where extended runtime and minimal voltage headroom are critical design constraints.

FAQ

What is the maximum input voltage rating for the NCP612SQ28T1?

The NCP612SQ28T1 has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, keep Vin ≤ 5.5 V under normal conditions, especially when ambient temperature exceeds 70°C, to maintain safe junction temperature margins within the SC70−5 package's 300°C/W thermal resistance.

Does the NCP612SQ28T1 require an external resistor divider for output voltage setting?

No, the NCP612SQ28T1 does not require an external resistor divider. It is a fixed-output regulator with factory-trimmed 2.8 V output achieved via internal precision resistors. The device contains no feedback pins - only Vin, Gnd, Enable, N/C, and Vout terminals - simplifying layout and eliminating trimming errors.

Can the NCP612SQ28T1 operate with a 1.0 µF ceramic capacitor on the output?

Yes, the NCP612SQ28T1 is explicitly characterized and guaranteed stable with a 1.0 µF ceramic capacitor (X5R/X7R) on the output, per its datasheet. No minimum ESR is required, unlike many older LDOs - enabling use of low-cost, small-size MLCCs without compromising transient response or loop stability.

What happens to the output when the Enable pin is left floating?

If the Enable pin is left floating, the NCP612SQ28T1 behavior is undefined and may result in erratic output regulation or oscillation due to noise coupling. The datasheet mandates connecting Enable to Vin if unused - this ensures reliable turn-on and avoids unintended shutdown or partial conduction that could increase ground current or cause thermal stress.

Is the NCP612SQ28T1 suitable for automotive applications?

The NCP612SQ28T1 (NCP prefix) is rated for −40°C to +85°C ambient and is intended for commercial/consumer applications. For automotive use, the NCV612SQ28T1 variant is specified for −40°C to +125°C and qualified to AEC-Q100 - the NCP612SQ28T1 lacks the extended temperature range and automotive process controls required for under-hood or infotainment systems.

NCP612SQ28T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

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)

NCP612SQ28T1 FAQ

1.How can I place an order for NCP612SQ28T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP612SQ28T1 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 NCP612SQ28T1 reliable?

The price and inventory of NCP612SQ28T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ28T1 is usually 5 days.

3.What payment methods are accepted for NCP612SQ28T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ28T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP612SQ28T1?

NCP612SQ28T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP612SQ28T1 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 NCP612SQ28T1?

For technical support, including NCP612SQ28T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ28T1 requirements.

6.How does Aetrix verify that NCP612SQ28T1 is sourced from the original manufacturer or authorized distributors?

All NCP612SQ28T1 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 NCP612SQ28T1 meets industry standards.

7.What is the process for return or replacement of NCP612SQ28T1?

All NCP612SQ28T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ28T1, 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 NCP612SQ28T1 part is unused and in its original packaging.

Return procedure for NCP612SQ28T1:

1.Submit a request within 90 days.

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

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