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

onsemi NCP582LSQ15T1G

Name: NCP582LSQ15T1G
Brand: onsemi
SKU: NCP582LSQ15T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP582LSQ15T1G

Manufacturer:: onsemi

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

Package:: SC-82A, SOT-343

Datasheet:: NCP582LSQ15T1G.pdf

Description:: IC REG LINEAR 1.5V 150MA SC82AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NCP582LSQ15T1G from onsemi is an ultra-fast, low-noise 150 mA CMOS low-dropout (LDO) voltage regulator with active-low enable and fixed 1.5 V output. It delivers 2% output voltage accuracy, 220 mV dropout at 150 mA, and 30 µV_RMS output noise (10 Hz–100 kHz), targeting precision power rails in portable battery-powered systems.

For engineers reviewing the NCP582LSQ15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC−82AB package, active-low CE functionality, 75 µA quiescent current, and high PSRR (70 dB @ 1 kHz) for noise-sensitive analog and RF subsystems.

Technical Context

The NCP582LSQ15T1G implements a CMOS-based LDO architecture with internal bandgap reference, error amplifier, and pass transistor-optimized for fast transient response and minimal load/line regulation drift. Its active-low enable pin supports system-level power sequencing and low-power shutdown modes.

It operates across −40°C to +85°C ambient, accepts input voltages up to 6.5 V, and maintains stable regulation with ceramic output capacitors as low as 0.47 µF (for V_OUT ≥ 2.5 V) or 1.0 µF (for V_OUT < 2.5 V). The device includes fold-back current limiting and thermal shutdown protection.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5 V ±2% - ensures stable core or I/O rail for low-voltage microcontrollers and sensors
Max Input Voltage	6.5 V - supports single-cell Li-ion (4.2 V), dual-cell alkaline (3.0 V), or USB-powered designs
Dropout Voltage	220 mV @ 150 mA - enables operation down to ~1.72 V input while sustaining full load
Quiescent Current	75 µA typ - minimizes battery drain in always-on or sleep-mode applications
Output Noise	30 µV_RMS (10 Hz–100 kHz) - suitable for powering ADCs, PLLs, and RF front-ends without external filtering
PSRR	70 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters
Load Regulation	22 mV max (1–150 mA) - maintains tight voltage stability across dynamic current demands

Pinout & Package

Package: SC−82AB (Case 419C), 4-pin surface-mount, Pb-free, 1.8 × 1.15 mm footprint, 0.8 mm height.

Pin/Terminal	Circuit Role	Design Meaning
1	Vin	Input power supply connection; requires 1.0 µF ceramic decoupling to GND per layout guidelines
2	GND	Power ground reference; second GND pin improves thermal and EMI performance
3	Vout	Regulated 1.5 V output; place 0.47 µF ceramic capacitor close to this pin for stability
4	CE (active-low)	Chip enable input; pulled low to activate regulator, high to enter shutdown (<1 µA I_SD)

Key Features

Feature	Design Value
Ultra-low dropout	220 mV @ 150 mA - extends usable battery life by enabling regulation deeper into discharge curve
Low output noise	30 µV_RMS without noise-reduction capacitor - eliminates need for external RC filter in noise-critical paths
High PSRR	70 dB @ 1 kHz - rejects ripple from noisy switchers, simplifying mixed-signal power partitioning
Fast dynamic response	Sub-µs load transient recovery (Fig. 21–22) - maintains regulation during CPU burst activity or sensor sampling
Auto-discharge disabled	Active-low CE variant (NCP582L) - prevents automatic Vout discharge on disable, preserving state in hold-up circuits

Applications

Portable Medical Sensors	Wearable Fitness Trackers
Use Scenario: Powering ultra-low-power optical heart-rate sensors and analog front-ends in compact wearable patches. IC Role / Device Role / Timing Role: Primary 1.5 V LDO supplying bias voltage to photodiode amplifiers and ADC reference rails. Use Value: 30 µV_RMS noise and 2% accuracy ensure sub-millivolt measurement fidelity; 75 µA I_q extends multi-week battery life.	Use Scenario: Regulating power for BLE SoC peripherals including accelerometers, gyroscopes, and flash memory interfaces. IC Role / Device Role / Timing Role: Low-noise 1.5 V supply for digital I/O banks and sensor interface logic requiring clean, stable voltage. Use Value: 220 mV dropout allows operation down to 1.72 V input-critical for maintaining function during Li-ion battery sag below 3.0 V.
Industrial Handheld Scanners	Smart IoT Edge Nodes
Use Scenario: Providing regulated 1.5 V to laser diode drivers and CMOS image sensor interfaces in rugged barcode scanners. IC Role / Device Role / Timing Role: High-PSRR LDO isolating sensitive imaging circuitry from noisy motor and communication supplies. Use Value: 70 dB PSRR at 1 kHz suppresses switching noise from motor drivers, preventing image artifacts and timing jitter.	Use Scenario: Supplying real-time clock (RTC) and secure element ICs in battery-backed edge nodes with long sleep intervals. IC Role / Device Role / Timing Role: Always-on 1.5 V regulator with active-low enable, enabling precise wake-up control and zero-current shutdown. Use Value: <1 µA shutdown current (I_SD) preserves coin-cell energy over years; 100 ppm/°C tempco ensures RTC accuracy across temperature swings.

Portable Medical Sensors

Wearable Fitness Trackers

Use Scenario: Powering ultra-low-power optical heart-rate sensors and analog front-ends in compact wearable patches.

IC Role / Device Role / Timing Role: Primary 1.5 V LDO supplying bias voltage to photodiode amplifiers and ADC reference rails.

Use Value: 30 µV_RMS noise and 2% accuracy ensure sub-millivolt measurement fidelity; 75 µA I_q extends multi-week battery life.

Use Scenario: Regulating power for BLE SoC peripherals including accelerometers, gyroscopes, and flash memory interfaces.

IC Role / Device Role / Timing Role: Low-noise 1.5 V supply for digital I/O banks and sensor interface logic requiring clean, stable voltage.

Use Value: 220 mV dropout allows operation down to 1.72 V input-critical for maintaining function during Li-ion battery sag below 3.0 V.

Industrial Handheld Scanners

Smart IoT Edge Nodes

Use Scenario: Providing regulated 1.5 V to laser diode drivers and CMOS image sensor interfaces in rugged barcode scanners.

IC Role / Device Role / Timing Role: High-PSRR LDO isolating sensitive imaging circuitry from noisy motor and communication supplies.

Use Value: 70 dB PSRR at 1 kHz suppresses switching noise from motor drivers, preventing image artifacts and timing jitter.

Use Scenario: Supplying real-time clock (RTC) and secure element ICs in battery-backed edge nodes with long sleep intervals.

IC Role / Device Role / Timing Role: Always-on 1.5 V regulator with active-low enable, enabling precise wake-up control and zero-current shutdown.

Use Value: <1 µA shutdown current (I_SD) preserves coin-cell energy over years; 100 ppm/°C tempco ensures RTC accuracy across temperature swings.

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/MB	250 mV dropout @ 250 mA; 1.8 µA I_q; SOT-23-5 package	Lacks active-low CE; no auto-discharge option; lower I_q but higher dropout	Prefer when ultra-low quiescent current dominates over dropout and enable polarity requirements
TCS2115-1.5	180 mV dropout @ 150 mA; 65 µA I_q; SC-70-5 package; active-high CE	Smaller footprint; slightly better dropout; incompatible CE polarity and pinout	Choose when board space is constrained and active-high enable aligns with system architecture

Compared with MCP1700T-1502E/MB and TCS2115-1.5, the NCP582LSQ15T1G uniquely combines active-low CE, 220 mV dropout, and 30 µV_RMS noise in SC−82AB-making it optimal for noise-sensitive, battery-constrained designs requiring precise enable control and minimal voltage headroom.

Availability

NCP582LSQ15T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial handheld scanners, and smart IoT edge nodes requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for NCP582LSQ15T1G 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 devices.

The NCP582 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for portable battery-powered applications demanding low noise, ultra-low dropout, and high accuracy under dynamic load conditions.

FAQ

What is the maximum input voltage rating for the NCP582LSQ15T1G?

The NCP582LSQ15T1G has an absolute maximum input voltage (V_IN) of 6.5 V. Operation beyond this risks permanent damage. For reliable long-term use, the recommended operating input range is 2.0 V to 6.0 V, as specified in the electrical characteristics table under typical conditions. This range ensures compliance with dropout, regulation, and thermal limits across temperature and load.

Does the NCP582LSQ15T1G require an external noise-reduction capacitor?

No, the NCP582LSQ15T1G achieves 30 µV_RMS output noise (10 Hz–100 kHz) without any external noise-reduction capacitor. Its internal design inherently minimizes noise generation, eliminating the need for additional components in most applications. However, proper PCB layout-including short traces, solid ground plane, and placement of the recommended 0.47 µF ceramic output capacitor near the Vout pin-is essential to maintain this performance.

What is the shutdown current of the NCP582LSQ15T1G when CE is high?

When the CE pin is held high (inactive state), the NCP582LSQ15T1G enters shutdown mode with a typical current draw of 0.1 µA and a maximum of 1.0 µA over temperature. This ultra-low shutdown current is critical for battery-powered applications where extended standby time is required, such as in IoT edge nodes or portable instrumentation with infrequent wake-up cycles.

Which package does the NCP582LSQ15T1G use, and what are its key mechanical dimensions?

The NCP582LSQ15T1G uses the SC−82AB package (Case 419C), a 4-pin surface-mount outline measuring 1.8 mm × 1.15 mm × 0.8 mm (max height). It features two GND pins (pins 2 and 5 per datasheet pin mapping) for improved thermal dissipation and EMI performance. The package is Pb-free and RoHS-compliant, with a recommended soldering footprint detailed in Figure 12 of the datasheet.

How does the NCP582LSQ15T1G compare to active-high enable variants like NCP582DSQ15T1G?

The NCP582LSQ15T1G differs from NCP582DSQ15T1G solely in enable polarity: NCP582LSQ15T1G uses active-low CE, while NCP582DSQ15T1G uses active-high CE with auto-discharge. Both share identical electrical specs-1.5 V output, 220 mV dropout, 30 µV_RMS noise, and SC−82AB packaging. The choice depends strictly on system-level control logic compatibility and whether automatic Vout discharge on disable is required.

NCP582LSQ15T1G 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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.70V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 95 µA

Current - Supply (Max):: -

PSRR:: 70dB ~ 60dB (1kHz ~ 10kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-82AB

NCP582LSQ15T1G FAQ

1.How can I place an order for NCP582LSQ15T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP582LSQ15T1G 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 NCP582LSQ15T1G reliable?

The price and inventory of NCP582LSQ15T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP582LSQ15T1G is usually 5 days.

3.What payment methods are accepted for NCP582LSQ15T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP582LSQ15T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP582LSQ15T1G?

NCP582LSQ15T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP582LSQ15T1G 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 NCP582LSQ15T1G?

For technical support, including NCP582LSQ15T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP582LSQ15T1G requirements.

6.How does Aetrix verify that NCP582LSQ15T1G is sourced from the original manufacturer or authorized distributors?

All NCP582LSQ15T1G 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 NCP582LSQ15T1G meets industry standards.

7.What is the process for return or replacement of NCP582LSQ15T1G?

All NCP582LSQ15T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP582LSQ15T1G, 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 NCP582LSQ15T1G part is unused and in its original packaging.

Return procedure for NCP582LSQ15T1G:

1.Submit a request within 90 days.

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

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