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

onsemi NCP612SQ15T2G

Name: NCP612SQ15T2G
Brand: onsemi
SKU: NCP612SQ15T2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP612SQ15T2G

Manufacturer:: onsemi

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

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

Datasheet:: NCP612SQ15T2G.pdf

Description:: IC REG LINEAR 1.5V 100MA SC88A

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NCP612SQ15T2G from onsemi is a fixed-output CMOS low-dropout linear voltage regulator delivering 1.5 V at up to 100 mA, featuring 40 µA typical quiescent current, 230 mV dropout at 100 mA (for 3.0 V version; 1.5 V variant specified at 530 mV), and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring ultra-low power consumption and stable low-voltage rail generation.

For engineers reviewing the NCP612SQ15T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC70-5 package footprint, enable-controlled shutdown capability, compatibility with low-ESR ceramic capacitors, and operation across −40 °C to +85 °C ambient temperature.

Technical Context

The NCP612SQ15T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection circuits in a single die. Its architecture enables stable regulation with no minimum load requirement and supports input voltages from 0 V to 6.0 V.

Enable functionality provides logic-level control (V_TH(EN) = 0.95 V high, 0.3 V low) for system-level power sequencing; the N/C pin (Pin 4) is unconnected internally and must remain floating or grounded per layout best practice - not tied to any active signal.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5 V ±2.0% over −40 °C to +85 °C, enabling precise low-voltage biasing for core logic or analog sensors.
Max Output Current	100 mA continuous, sufficient for powering microcontrollers, RF transceivers, or sensor interfaces in space-constrained designs.
Quiescent Current	40 µA typical (I_Q), critical for extending battery life in always-on wearable or IoT edge nodes.
Dropout Voltage	530 mV max at 100 mA and −40 °C to +85 °C, allowing operation from single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (up to 3.2 V).
Input Voltage Range	0 V to 6.0 V, supporting wide-input legacy battery systems and post-regulation stages without external clamping.
Thermal Protection	Internal shutdown at ~160 °C junction temperature, preventing catastrophic failure during transient overload or poor PCB thermal design.
Package	SC70-5 (SOT-353), 2.0 mm × 2.1 mm footprint with 0.65 mm pitch - optimized for high-density portable PCBs.

Pinout & Package

The NCP612SQ15T2G is housed in the SC70-5 surface-mount package (Case 419A), measuring 2.0 mm × 2.1 mm × 0.9 mm with gull-wing leads and Pb-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1	Vin	Positive input supply connection; requires local 1.0 µF decoupling capacitor placed adjacent to pin for line transient immunity.
2	Gnd	Power ground reference; must be routed with low-impedance copper pour to minimize noise coupling into regulation loop.
3	Enable	Active-high digital control input; pulls device into ultra-low-I_Q standby (<0.03 µA) when driven low; tied to Vin if unused.
4	N/C	No internal connection; electrically isolated - must not be soldered to trace or plane to avoid parasitic coupling.
5	Vout	Regulated 1.5 V output; requires 1.0 µF ceramic output capacitor (X5R/X7R) placed within 2 mm for stability and load transient response.

Key Features

Feature	Design Value
Ultra-low quiescent current	40 µA typical enables >1-year battery life in 10 µA average-load applications like BLE beacons.
Low-ESR capacitor compatible	Stable with 1.0 µF ceramic capacitors (no ESR minimum), reducing BOM cost and board area vs. tantalum alternatives.
Enable-controlled shutdown	Reduces total system I_Q to <0.03 µA during sleep modes, supporting deep-power-down architectures.
±2.0% output accuracy	Meets tight tolerance requirements for ADC references, precision analog front-ends, and low-voltage MCU cores.
Thermal & current limiting	Integrated protection prevents damage during short-circuit events or PCB thermal overload without external components.

Applications

Wearable Health Monitor	IoT Edge Sensor Node
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.5 V supply to analog front-end and ultra-low-power MCU. Use Value: 40 µA I_Q extends battery life beyond 18 months; ±2.0% V_out ensures consistent ADC reference scaling across temperature.	Use Scenario: Battery-operated environmental sensor transmitting data via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Powers MCU, sensor ICs, and RF transceiver during active transmit bursts. Use Value: SC70-5 footprint saves PCB area; enable pin synchronizes power delivery with radio wake-up, minimizing idle leakage.
Portable Medical Diagnostic Tool	Smart Home Motion Detector
Use Scenario: Handheld pulse oximeter using red/IR LEDs and photodiode array. IC Role / Device Role / Timing Role: Supplies regulated 1.5 V to LED drivers and signal conditioning circuitry. Use Value: 530 mV dropout allows operation down to 2.0 V input, maximizing usable capacity from single alkaline cell.	Use Scenario: PIR-based occupancy sensor with wake-on-motion and BLE reporting. IC Role / Device Role / Timing Role: Delivers stable 1.5 V to PIR signal chain and BLE SoC during brief active periods. Use Value: Thermal shutdown prevents latch-up during enclosure overheating; N/C pin simplifies routing in dense 4-layer layouts.

Wearable Health Monitor

IoT Edge Sensor Node

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

IC Role / Device Role / Timing Role: Provides clean, low-noise 1.5 V supply to analog front-end and ultra-low-power MCU.

Use Value: 40 µA I_Q extends battery life beyond 18 months; ±2.0% V_out ensures consistent ADC reference scaling across temperature.

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

IC Role / Device Role / Timing Role: Powers MCU, sensor ICs, and RF transceiver during active transmit bursts.

Use Value: SC70-5 footprint saves PCB area; enable pin synchronizes power delivery with radio wake-up, minimizing idle leakage.

Portable Medical Diagnostic Tool

Smart Home Motion Detector

Use Scenario: Handheld pulse oximeter using red/IR LEDs and photodiode array.

IC Role / Device Role / Timing Role: Supplies regulated 1.5 V to LED drivers and signal conditioning circuitry.

Use Value: 530 mV dropout allows operation down to 2.0 V input, maximizing usable capacity from single alkaline cell.

Use Scenario: PIR-based occupancy sensor with wake-on-motion and BLE reporting.

IC Role / Device Role / Timing Role: Delivers stable 1.5 V to PIR signal chain and BLE SoC during brief active periods.

Use Value: Thermal shutdown prevents latch-up during enclosure overheating; N/C pin simplifies routing in dense 4-layer 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-1502E/TT	45 µA I_Q, 600 mV dropout at 100 mA, SOT-23-5 package (larger than SC70-5).	Higher dropout limits usable input range; larger footprint increases PCB area by 2.8×.	Select only if SC70-5 assembly capability is unavailable or thermal margin exceeds 100 mW.
AP2210K-15W5	65 µA I_Q, 300 mV dropout at 100 mA, same SC70-5 package, but ±3.0% V_out accuracy.	Looser voltage tolerance may affect ADC linearity or sensor calibration stability.	Acceptable for non-precision digital loads where 1.5 V ±3.0% suffices and lower I_Q is not critical.

Compared with MCP1700T-1502E/TT and AP2210K-15W5, the NCP612SQ15T2G offers the lowest quiescent current in SC70-5, tighter output accuracy, and proven stability with minimal external capacitance - making it optimal for miniaturized, long-life battery systems where voltage precision and size are primary constraints.

Availability

NCP612SQ15T2G is available at Aetrix Electronics and suitable for wearable health monitors, IoT edge sensor nodes, and portable medical diagnostic tools requiring stable component supply with guaranteed long-term sourcing.

Supply support for NCP612SQ15T2G 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, with leadership in automotive, industrial, cloud, and IoT power management solutions.

The NCP612 series belongs to onsemi's ultra-low-I_Q LDO portfolio, engineered specifically for battery-powered portable equipment demanding extended runtime and minimal PCB real estate.

FAQ

What is the maximum input voltage rating for the NCP612SQ15T2G?

The NCP612SQ15T2G supports an absolute maximum input voltage of 6.0 V, as specified in the Maximum Ratings table. Exceeding this value risks permanent damage to the internal PMOS pass element and protection circuitry. For reliable operation, maintain Vin ≤ 6.0 V under all conditions including transient spikes, and use appropriate input filtering if sourced from unregulated supplies.

Does the NCP612SQ15T2G require an external pull-up resistor on the Enable pin?

No, the NCP612SQ15T2G does not require an external pull-up resistor on the Enable pin. When unused, the Enable pin must be directly connected to Vin to ensure normal operation. The internal structure supports direct tie-to-rail usage, and adding a pull-up resistor introduces unnecessary leakage and potential noise coupling - contrary to the datasheet's explicit recommendation.

Can the NCP612SQ15T2G operate with a 1.0 µF ceramic output capacitor?

Yes, the NCP612SQ15T2G is explicitly characterized and guaranteed stable with a 1.0 µF ceramic output capacitor (X5R or X7R dielectric), as confirmed in both the Typical Application Diagram and Applications Information section. No minimum ESR is required, eliminating the need for bulkier or more expensive tantalum alternatives.

What is the dropout voltage specification for the NCP612SQ15T2G at 100 mA and 25 °C?

The dropout voltage for the NCP612SQ15T2G is not explicitly tabulated at 25 °C and 100 mA in the datasheet. However, the Electrical Characteristics table specifies 530 mV maximum at −40 °C to +85 °C under those conditions. At 25 °C, typical dropout is approximately 420 mV (per Figure 2 curve extrapolation for 1.5 V version), but design must use the 530 mV worst-case value for margin.

Is the NCP612SQ15T2G still in active production or discontinued?

The NCP612SQ15T2G remains active and available for purchase. While Revision 5 of the datasheet (Nov 2025) marks several variants as discontinued, NCP612SQ15T2G is explicitly listed in the Ordering Information table (page 9) with "3,000 Units / Tape & Reel" shipping format and no discontinuation note - confirming ongoing manufacturing and distribution support.

NCP612SQ15T2G 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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.68V @ 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)

NCP612SQ15T2G FAQ

1.How can I place an order for NCP612SQ15T2G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP612SQ15T2G 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 NCP612SQ15T2G reliable?

The price and inventory of NCP612SQ15T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ15T2G is usually 5 days.

3.What payment methods are accepted for NCP612SQ15T2G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ15T2G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP612SQ15T2G?

NCP612SQ15T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP612SQ15T2G 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 NCP612SQ15T2G?

For technical support, including NCP612SQ15T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ15T2G requirements.

6.How does Aetrix verify that NCP612SQ15T2G is sourced from the original manufacturer or authorized distributors?

All NCP612SQ15T2G 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 NCP612SQ15T2G meets industry standards.

7.What is the process for return or replacement of NCP612SQ15T2G?

All NCP612SQ15T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ15T2G, 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 NCP612SQ15T2G part is unused and in its original packaging.

Return procedure for NCP612SQ15T2G:

1.Submit a request within 90 days.

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

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