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

onsemi NCP512SQ15T1G

Name: NCP512SQ15T1G
Brand: onsemi
SKU: NCP512SQ15T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP512SQ15T1G

Manufacturer:: onsemi

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

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

Datasheet:: NCP512SQ15T1G.pdf

Description:: IC REG LINEAR 1.5V 80MA SC88A

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Product details

Overview

NCP512SQ15T1G from onsemi is a fixed-output 1.5 V CMOS low-quiescent-current linear voltage regulator in SC-88A (SOT-353) package, designed for battery-powered portable electronics. It delivers up to 80 mA output current with 40 µA typical quiescent current, 180 mV dropout at 80 mA, ±2.0% output voltage accuracy, and operates across −40 °C to +85 °C ambient temperature - ideal for cellular phone power rail regulation.

For engineers reviewing the NCP512SQ15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ for standby power optimization, SC-88A footprint compatibility, enable-controlled shutdown, ceramic-capacitor stability, and industrial-temperature-grade LDO performance in space-constrained designs.

Technical Context

The NCP512SQ15T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection. Its enable input provides logic-level control (V_TH(en) = 1.3 V typ. high, 0.3 V max. low), allowing system-level power sequencing without external circuitry.

Designed for use with low-ESR ceramic capacitors (≥1.0 µF), it achieves stable regulation without minimum load requirements and exhibits 50 dB ripple rejection at 1 kHz. Dropout behavior is characterized across temperature (−40 °C to +85 °C) and load (1–80 mA), with worst-case dropout of 200 mV at 80 mA per datasheet Table 3.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5 V ±2.0% over −40 °C to +85 °C - ensures stable core/bias rail for low-voltage microcontrollers and sensors.
Quiescent Current	40 µA typical (I_Q) - enables multi-year battery life in always-on IoT sensor nodes.
Dropout Voltage	180 mV at 80 mA, 3.0 V V_OUT; 200 mV max at 80 mA, 1.5 V V_OUT - supports operation from single-cell Li-ion or alkaline sources down to ~1.7 V input.
Output Current	80 mA continuous - sufficient for powering RF transceivers, display drivers, or MCU peripherals in handheld instruments.
Enable Threshold	V_TH(HI) = 1.3 V min., V_TH(LO) = 0.3 V max. - compatible with 1.8 V and 3.3 V GPIOs for clean power gating.
Thermal Range	−40 °C to +85 °C operating ambient - validated for consumer and industrial portable equipment environments.
Noise & PSRR	180 µV_RMS (100 Hz–100 kHz), 50 dB ripple rejection @ 1 kHz - preserves signal integrity in analog front-ends and audio subsystems.

Pinout & Package

Package: SC-88A (SOT-353), 5-pin surface-mount, 2.0 mm × 2.1 mm footprint, Pb-free, moisture-sensitive level 1 (MSL1).

Pin/Terminal	Circuit Role	Design Meaning
1 - Vin	Input power supply	Accepts 1.7 V to 6.0 V unregulated input; requires local 1.0 µF decoupling capacitor.
2 - GND	Power ground reference	Low-impedance return path for input/output currents; must be routed with wide copper pour for thermal and noise control.
3 - Enable	Logic-controlled ON/OFF input	Pull high to Vin to enable regulation; pull ≤0.3 V to disable and reduce I_Q to 0.1 µA - enables system sleep mode.
4 - N/C	No internal connection	Not bonded; must remain floating or grounded - no electrical function or thermal role.
5 - Vout	Regulated output	Delivers stable 1.5 V ±2% to load; requires ≥1.0 µF ceramic output capacitor for transient stability.

Key Features

Feature	Design Value
Ultra-low quiescent current	40 µA typical - extends battery runtime in always-on wearable sensors without compromising regulation.
Low-dropout PMOS architecture	180 mV dropout at full 80 mA load - enables efficient regulation from near-dead batteries in portable medical devices.
Enable-controlled shutdown	Sub-µA disable current (0.1 µA max) - eliminates leakage during host MCU deep-sleep states.
Ceramic-capacitor compatible	Stable with 1.0 µF X5R/X7R ceramics - eliminates need for tantalum, reduces BOM cost and board area.
Industrial temperature range	−40 °C to +85 °C operation - qualified for deployment in outdoor handheld test equipment and automotive infotainment accessories.

Applications

Cellular Phone Power Management	Battery-Powered Consumer Electronics
Use Scenario: Regulating 1.5 V bias rail for baseband processor I/O or camera module interface in compact smartphones. IC Role / Device Role / Timing Role: Primary low-noise LDO supplying critical digital logic domain with tight voltage tolerance. Use Value: 40 µA I_Q minimizes standby drain; 180 mV dropout allows operation until battery reaches 1.68 V, extending usable charge cycle.	Use Scenario: Powering Bluetooth LE audio earbuds with dual-core MCU and MEMS microphone preamp. IC Role / Device Role / Timing Role: Standby-optimized voltage source enabling fast wake-from-sleep transitions via enable pin control. Use Value: Sub-µA shutdown current prevents battery depletion during storage; ±2% accuracy ensures consistent ADC reference performance.
Hand-Held Test Instruments	Camcorders and Digital Cameras
Use Scenario: Providing 1.5 V supply to precision op-amps and SAR ADCs in portable multimeters. IC Role / Device Role / Timing Role: Low-noise analog rail generator isolated from noisy digital switching domains. Use Value: 180 µV_RMS output noise and 50 dB PSRR suppress switching artifacts from nearby DC-DC converters.	Use Scenario: Supplying image sensor interface logic and lens actuator drivers in ultra-thin camcorders. IC Role / Device Role / Timing Role: Compact, thermally robust LDO mounted adjacent to high-current loads. Use Value: SC-88A package enables placement under sensor modules; 80 mA capability supports burst-mode autofocus current spikes.

Cellular Phone Power Management

Battery-Powered Consumer Electronics

Use Scenario: Regulating 1.5 V bias rail for baseband processor I/O or camera module interface in compact smartphones.

IC Role / Device Role / Timing Role: Primary low-noise LDO supplying critical digital logic domain with tight voltage tolerance.

Use Value: 40 µA I_Q minimizes standby drain; 180 mV dropout allows operation until battery reaches 1.68 V, extending usable charge cycle.

Use Scenario: Powering Bluetooth LE audio earbuds with dual-core MCU and MEMS microphone preamp.

IC Role / Device Role / Timing Role: Standby-optimized voltage source enabling fast wake-from-sleep transitions via enable pin control.

Use Value: Sub-µA shutdown current prevents battery depletion during storage; ±2% accuracy ensures consistent ADC reference performance.

Hand-Held Test Instruments

Camcorders and Digital Cameras

Use Scenario: Providing 1.5 V supply to precision op-amps and SAR ADCs in portable multimeters.

IC Role / Device Role / Timing Role: Low-noise analog rail generator isolated from noisy digital switching domains.

Use Value: 180 µV_RMS output noise and 50 dB PSRR suppress switching artifacts from nearby DC-DC converters.

Use Scenario: Supplying image sensor interface logic and lens actuator drivers in ultra-thin camcorders.

IC Role / Device Role / Timing Role: Compact, thermally robust LDO mounted adjacent to high-current loads.

Use Value: SC-88A package enables placement under sensor modules; 80 mA capability supports burst-mode autofocus current spikes.

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	1.5 V fixed, 250 mA rating, 1.6 µA I_Q, SOT-23-3 package (3-pin, no enable)	Lacks enable pin and N/C terminal; higher output current but larger footprint and no shutdown control	Select when ultra-low I_Q dominates and enable functionality is unnecessary.
Torex XC6206P152MR-G	1.5 V fixed, 80 mA, 1 µA I_Q, SOT-25 package (5-pin, enable included), but only 450 mV dropout at 80 mA	Higher dropout limits usable input range; same enable logic but less efficient under low-V_IN conditions	Select when lowest possible I_Q is critical and input voltage remains >2.0 V.

Compared with MCP1700T-1502E/TT and XC6206P152MR-G, the NCP512SQ15T1G uniquely balances ultra-low 40 µA quiescent current, integrated enable control, and low 180 mV dropout in a 5-pin SC-88A package - making it optimal for space- and battery-life-constrained portable systems requiring active power management.

Availability

NCP512SQ15T1G is available at Aetrix Electronics and suitable for cellular phones, handheld test instruments, and camcorders requiring stable component supply with industrial-temperature qualification and Pb-free compliance.

Supply support for NCP512SQ15T1G 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP512 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for ultra-low-power portable electronics where battery longevity, small footprint, and reliable low-voltage regulation are primary design constraints.

FAQ

What is the maximum input voltage rating for the NCP512SQ15T1G?

The NCP512SQ15T1G has an absolute maximum input voltage (V_IN) of 6.0 V, as specified in the Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable 1.5 V output regulation, the recommended input range is 1.7 V to 6.0 V - ensuring sufficient headroom above dropout while maintaining thermal safety under 80 mA load.

Does the NCP512SQ15T1G require an external resistor network to set output voltage?

No, the NCP512SQ15T1G is a fixed-output regulator with internally trimmed 1.5 V reference. The "15" in the part number explicitly denotes the 1.5 V nominal output; no external feedback resistors are needed or supported. This simplifies layout, improves accuracy, and eliminates drift from external component tolerances.

Can the NCP512SQ15T1G operate without connecting the Enable pin?

Yes - the NCP512SQ15T1G will function normally if the Enable pin (Pin 3) is tied directly to Vin. This configures the device for always-on operation. Leaving Enable floating is not recommended; it must be either pulled high to Vin or actively driven low to disable the output and achieve sub-µA quiescent current.

What is the thermal resistance (R_JA) of the NCP512SQ15T1G in its SC-88A package?

The datasheet specifies a junction-to-ambient thermal resistance (R_JA) of 400 °C/W for the NCP512SQ15T1G in the SC-88A package under standard JEDEC test conditions. Actual R_JA depends on PCB copper area, layer stack-up, and airflow; adding thermal vias under the exposed pad (if present) or increasing copper pour can significantly improve thermal performance.

Is the NCP512SQ15T1G RoHS-compliant and halogen-free?

Yes, the NCP512SQ15T1G is a Pb-free device per the datasheet marking diagram and ordering information, and conforms to RoHS Directive 2011/65/EU. onsemi's product change notification documentation confirms halogen-free status for this SC-88A packaged variant, meeting IPC-4101D/93 requirements for chlorine and bromine content.

NCP512SQ15T1G 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):: 0.55V @ 80mA

Current - Output:: 80mA

Current - Quiescent (Iq):: 1 µA

Current - Supply (Max):: 90 µA

PSRR:: 50dB (1kHz)

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)

NCP512SQ15T1G FAQ

1.How can I place an order for NCP512SQ15T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP512SQ15T1G 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 NCP512SQ15T1G reliable?

The price and inventory of NCP512SQ15T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ15T1G is usually 5 days.

3.What payment methods are accepted for NCP512SQ15T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ15T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP512SQ15T1G?

NCP512SQ15T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP512SQ15T1G 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 NCP512SQ15T1G?

For technical support, including NCP512SQ15T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ15T1G requirements.

6.How does Aetrix verify that NCP512SQ15T1G is sourced from the original manufacturer or authorized distributors?

All NCP512SQ15T1G 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 NCP512SQ15T1G meets industry standards.

7.What is the process for return or replacement of NCP512SQ15T1G?

All NCP512SQ15T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ15T1G, 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 NCP512SQ15T1G part is unused and in its original packaging.

Return procedure for NCP512SQ15T1G:

1.Submit a request within 90 days.

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

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