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onsemi NCP582LSQ28T1G
- Part No.:
- NCP582LSQ28T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP582LSQ28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
NCP582LSQ28T1G from onsemi is an ultra-fast, low-noise 150 mA CMOS low-dropout (LDO) regulator with active-low enable and no-connect pin, delivering a fixed 2.8 V output voltage in SC-82AB package. It features 220 mV dropout at 150 mA, 30 µVRMS output noise (10 Hz–100 kHz), and ±2% output voltage accuracy over load/temperature. It serves as a precision power rail for battery-powered microcontrollers and analog sensors in portable instrumentation.
For engineers reviewing the NCP582LSQ28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 75 µA quiescent current, 70 dB PSRR at 1 kHz, −40°C to +85°C operating range, and compatibility with 0.47 µF ceramic output capacitance for 2.8 V output.
Technical Context
The NCP582LSQ28T1G implements a CMOS-based LDO architecture with internal bandgap reference, error amplifier, and P-channel pass transistor. Its active-low CE pin enables fast shutdown with sub-1 µA shutdown current and includes auto-discharge functionality only in active-high variants - this part (LSQ) is active-low and does not integrate auto-discharge.
It operates across 2.0 V to 6.0 V input voltage range while maintaining regulation down to VIN = VOUT + 0.22 V at full load. Line regulation is 0.02%/V (typ), load regulation is 22 mV (typ), and output voltage drift is 100 ppm/°C - confirming tight thermal stability for precision analog rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% - ensures stable supply for 2.8 V I/O domains and RF front-end biasing. |
| Max Output Current | 150 mA - sufficient for powering Cortex-M0+ MCUs, ADCs, and low-power wireless SoCs. |
| Dropout Voltage | 220 mV at 150 mA - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) without brownout. |
| Quiescent Current | 75 µA (typ) - minimizes battery drain in always-on sensor nodes and sleep-mode peripherals. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz) - suitable for noise-sensitive analog circuits like audio codecs and precision references. |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive cabin applications. |
Pinout & Package
Package: SC-82AB (Case 419C), 4-pin surface-mount, Pb-free, 1.8 mm × 1.2 mm footprint, 0.8 mm max height. Thermal pad not present; power dissipation limited to 150 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Input power supply | Accepts 2.0–6.0 V; requires 1.0 µF ceramic decoupling capacitor per datasheet recommendation. |
| 2 (GND) | Power ground | Dual GND pins (2 and 5) provide low-impedance return path; must be tied together externally. |
| 3 (Vout) | Regulated output | Delivers fixed 2.8 V; requires 0.47 µF ceramic output capacitor for optimal transient response and stability. |
| 4 (NC) | No connect | Internally unconnected; must remain floating - no routing or soldering allowed. |
| 5 (GND) | Power ground | Second ground terminal; improves thermal and EMI performance when both GND pins are properly connected. |
| 6 (CE) | Active-low enable | Pull high (>1.5 V) to enable; pull low (<0.3 V) to disable; shutdown current ≤1.0 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 220 mV at 150 mA enables use with depleting batteries while sustaining regulation. |
| Low-noise regulation | 30 µVRMS noise eliminates need for external RC filters in analog signal chains. |
| High PSRR | 70 dB at 1 kHz rejects ripple from upstream switching regulators without additional filtering. |
| Tight output accuracy | ±2% over line/load/temperature ensures reliable logic-level compliance for 2.8 V I/O interfaces. |
| Foldback protection | Current-limiting reduces power dissipation during short-circuit events, enhancing reliability. |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE MCU and electrochemical sensor front-end. IC Role / Device Role / Timing Role: Primary 2.8 V supply for MCU core, BLE radio, and precision ADC reference. Use Value: 75 µA quiescent current extends battery life beyond 6 months; 30 µVRMS noise prevents baseline drift in µA-level sensor current measurements. | Use Scenario: Battery-powered multimeter with LCD display, isolated serial interface, and thermocouple amplifier. IC Role / Device Role / Timing Role: Clean 2.8 V rail for op-amps, SAR ADC, and microcontroller I/O bank. Use Value: 220 mV dropout allows operation down to 3.02 V input, supporting >95% of alkaline battery discharge curve without reset. |
| Camcorder Image Signal Chain | Smart Home Motion Sensor Hub |
Use Scenario: Low-light CMOS image sensor module with on-board ISP and video encoder. IC Role / Device Role / Timing Role: Dedicated 2.8 V supply for image sensor analog core and PLL clock generator. Use Value: 70 dB PSRR isolates sensor analog supply from digital switching noise generated by video processing logic. | Use Scenario: Zigbee-enabled occupancy sensor node with PIR detector, ambient light sensor, and flash memory. IC Role / Device Role / Timing Role: Always-on 2.8 V rail for ultra-low-power MCU and wake-up circuitry. Use Value: Sub-1 µA shutdown current during deep-sleep mode meets <1 µA system leakage targets for 10-year battery life. |
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 | 250 mV dropout at 250 mA; 1.6 µA quiescent current; SOT-23-5 package. | Lacks enable pin; no CE functionality - unsuitable where controlled power sequencing is required. | Select only if enable control is unnecessary and ultra-low IQ dominates design priority. |
| TNIV2800002R | 200 mV dropout at 150 mA; 65 µA IQ; SC-70-5 package; 1.5% initial accuracy. | Smaller footprint but lower thermal mass; derated output current above 60°C ambient. | Prefer for space-constrained designs where thermal margin is verified below 60°C. |
Compared with MCP1700T-2802E/TT and TNIV2800002R, the NCP582LSQ28T1G uniquely combines active-low enable, 220 mV dropout, and 30 µVRMS noise in a thermally robust SC-82AB package - making it optimal for battery-powered systems requiring both precision regulation and controlled startup/shutdown.
Availability
NCP582LSQ28T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, camcorder image signal chains, and smart home motion sensor hubs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NCP582LSQ28T1G 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 innovation for automotive, industrial, cloud, and IoT applications.
The NCP582 series belongs to onsemi's precision analog power management portfolio, designed specifically for battery-powered portable equipment demanding ultra-low noise, low dropout, and high accuracy under dynamic load conditions.
FAQ
What is the maximum input voltage rating for the NCP582LSQ28T1G?
The NCP582LSQ28T1G has an absolute maximum input voltage (VIN) rating of 6.5 V. However, the recommended operating input voltage range is 2.0 V to 6.0 V, as specified in the Electrical Characteristics table. Exceeding 6.5 V may cause permanent damage. For reliable operation with 2.8 V output, input should remain ≥3.02 V to maintain regulation at full 150 mA load due to its 220 mV dropout.
Does the NCP582LSQ28T1G include auto-discharge functionality?
No, the NCP582LSQ28T1G does not include auto-discharge. Auto-discharge is only implemented in the active-high variants (e.g., NCP582DSQ28T1G). The "L" prefix in NCP582LSQ28T1G denotes active-low enable, and the datasheet explicitly states auto-discharge is absent in LSQ versions. When disabled via CE, output voltage decays only through external load or board leakage.
What output capacitor value is required for stable operation of the NCP582LSQ28T1G?
The NCP582LSQ28T1G requires a 0.47 µF ceramic output capacitor for stable operation at 2.8 V output, as specified in the Application Information section. Using 1.0 µF is acceptable but not required; larger values improve transient response but do not affect stability. Capacitor ESR must be low (<100 mΩ), and placement must be adjacent to Vout and GND pins to minimize loop inductance.
Is the NCP582LSQ28T1G pin-compatible with other variants in the NCP582 family?
Yes, all SC-82AB-packaged NCP582 variants - including NCP582LSQ28T1G, NCP582DSQ28T1G, and NCP582LSQ33T1G - share identical pinout, package dimensions, and thermal characteristics. Only the enable logic (active-low vs. active-high) and output voltage differ. PCB layout is fully reusable across SQ-suffix parts, enabling voltage and control-mode flexibility without redesign.
What is the thermal performance limit of the NCP582LSQ28T1G in SC-82AB package?
In SC-82AB package, the NCP582LSQ28T1G has a maximum power dissipation of 150 mW at TA = 25°C. With θJA ≈ 125°C/W (estimated from package size and JEDEC standards), junction temperature rise is ~18.75°C at 150 mW. At 150 mA load and 3.5 V input, power dissipation is (3.5 V − 2.8 V) × 0.15 A = 105 mW - well within safe limits up to +85°C ambient, assuming standard 2-layer PCB copper pour.
NCP582LSQ28T1G 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 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
NCP582LSQ28T1G FAQ
1.How can I place an order for NCP582LSQ28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP582LSQ28T1G 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 NCP582LSQ28T1G reliable?
The price and inventory of NCP582LSQ28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP582LSQ28T1G is usually 5 days.
3.What payment methods are accepted for NCP582LSQ28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP582LSQ28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP582LSQ28T1G?
NCP582LSQ28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP582LSQ28T1G 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 NCP582LSQ28T1G?
For technical support, including NCP582LSQ28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP582LSQ28T1G requirements.
6.How does Aetrix verify that NCP582LSQ28T1G is sourced from the original manufacturer or authorized distributors?
All NCP582LSQ28T1G 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 NCP582LSQ28T1G meets industry standards.
7.What is the process for return or replacement of NCP582LSQ28T1G?
All NCP582LSQ28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP582LSQ28T1G, 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 NCP582LSQ28T1G part is unused and in its original packaging.
Return procedure for NCP582LSQ28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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