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onsemi NCP580SQ18T1G
- Part No.:
- NCP580SQ18T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP580SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 120MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,459
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Product details
Overview
NCP580SQ18T1G from onsemi is an ultra-fast, low-noise 120 mA CMOS low-dropout (LDO) regulator with enable function, designed for precision voltage regulation in portable battery-powered systems. It delivers 1.8 V output with ±1.5% accuracy, 150 mV dropout at 100 mA, 30 µVRMS output noise, and 70 dB PSRR at 1 kHz - enabling stable power for RF-sensitive analog circuits in handheld instrumentation.
For engineers reviewing the NCP580SQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC-82AB package footprint, active-high CE input threshold (1.5 V min), 90 µA quiescent current, and compatibility with 2.2 µF ceramic output capacitors - all critical for space-constrained, low-power embedded designs.
Technical Context
The NCP580SQ18T1G employs a CMOS pass transistor architecture with internal bandgap reference and error amplifier to achieve tight line regulation (0.02%/V) and load regulation (12 mV). Its fast dynamic response supports rapid load transients up to 50 mA/µs without significant overshoot, validated by load transient waveforms with 2.2 µF output capacitance.
It integrates fold-back current limiting and thermal shutdown protection, operates across –40°C to +85°C ambient, and features a low temperature coefficient of 100 ppm/°C on output voltage - ensuring stability over industrial temperature ranges without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±1.5% - ensures reliable biasing of 1.8 V logic and analog ICs without margin violation. |
| Max Output Current | 120 mA - sufficient to power microcontroller cores, sensors, or RF front-end ICs in portable devices. |
| Dropout Voltage | 280 mV at 120 mA (typ.) - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) sources. |
| Quiescent Current | 90 µA (typ.) - extends battery life in always-on monitoring circuits with infrequent wake-up cycles. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input rail. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz) - preserves signal integrity in ADC reference supplies and low-noise amplifiers. |
| Enable Threshold | VTH,ENH = 1.5 V min - compatible with 1.8 V GPIO outputs for precise power sequencing control. |
Pinout & Package
Package: SC-82AB (Case 419C-02), 4-pin surface-mount, 1.90 mm × 1.30 mm × 0.95 mm body, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vout | Regulated output voltage node | Connects directly to load; requires ≥2.2 µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| 2 - GND | Power supply ground reference | Must be tied to low-impedance system ground plane; shared return path for input/output decoupling caps. |
| 3 - CE | Active-high chip enable input | Pulled high ≥1.5 V to enable regulation; pulled ≤0.3 V to reduce shutdown current to 0.1 µA. |
| 4 - Vin | Unregulated input supply input | Accepts 2.2–6.0 V; requires 1.0 µF ceramic capacitor between Vin and GND close to the pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 280 mV at 120 mA enables use with shallow input-to-output headroom in battery discharge profiles. |
| Low-noise regulation | 30 µVRMS output noise eliminates need for external noise-reduction capacitors in precision analog rails. |
| Fast transient response | Stabilizes within <5 µs after 50 mA load step (with 2.2 µF Cout), reducing need for oversized bulk capacitance. |
| Thermal & current protection | Fold-back current limit and thermal shutdown prevent damage during sustained overload or PCB overheating. |
| Wide input range | 2.2–6.0 V input supports multi-chemistry battery inputs (Li-ion, Li-Po, alkaline, NiMH) without redesign. |
Applications
| Portable Medical Sensors | Wearable Biometric Monitors |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition in compact patch-style monitors powered by coin-cell or thin-film batteries. IC Role / Device Role / Timing Role: Primary 1.8 V analog supply for ADC, op-amps, and sensor interface circuitry. Use Value: Low 30 µVRMS noise prevents baseline drift and quantization errors; 90 µA IQ extends runtime beyond 7 days on CR2032. |
Use Scenario: Always-on heart rate and SpO₂ measurement in wrist-worn fitness trackers with Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Stable 1.8 V core supply for ultra-low-power MCU and optical sensor ASIC. Use Value: 280 mV dropout allows operation down to 2.08 V input, supporting full discharge of 2.2 V nominal Li-SOCl₂ cells. |
| Industrial Handheld Scanners | IoT Edge Node Sensor Hubs |
|
Use Scenario: Ruggedized barcode scanners using dual AA alkaline batteries and requiring ESD-hardened, low-noise power. IC Role / Device Role / Timing Role: Regulated 1.8 V rail for image sensor interface and laser driver control logic. Use Value: 1500 V HBM ESD rating and 70 dB PSRR reject noise from motor drivers and RF modules sharing same battery source. |
Use Scenario: Battery-operated environmental sensor nodes (temp/humidity/pressure) transmitting via LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Enable-controlled 1.8 V supply for sensor interface and sub-GHz transceiver during active measurement bursts. Use Value: 0.1 µA shutdown current minimizes leakage during 99% sleep duty cycle; active-high CE simplifies GPIO control from host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 120 mA max, 1.8 V fixed, 6 µA IQ, but only 45 dB PSRR at 1 kHz and no CE pin. | Lacks enable control and has lower noise rejection - unsuitable for mixed-signal systems with switching regulators. | Choose only if ultra-low IQ dominates over PSRR and sequencing needs. |
| TNIV18018001R | 150 mA max, 1.8 V fixed, 120 µA IQ, SC-70-5 package, CE-compatible but higher 400 mV dropout at 120 mA. | Higher dropout limits usable input range; larger package increases board area vs. SC-82AB. | Select when higher output current margin is required and layout space permits larger footprint. |
Compared with MCP1700T-1802E/TT and TNIV18018001R, the NCP580SQ18T1G uniquely balances ultra-low noise (30 µVRMS), high PSRR (70 dB), and integrated enable in the smallest SC-82AB package - making it optimal for noise-sensitive, space-constrained, and sequenced power architectures.
Availability
NCP580SQ18T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable biometric monitors, and industrial handheld scanners requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for NCP580SQ18T1G 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 IoT applications.
The NCP580 series belongs to onsemi's precision analog power management portfolio, engineered specifically for battery-powered portable equipment demanding low noise, low dropout, and minimal quiescent current.
FAQ
What is the maximum input voltage rating for the NCP580SQ18T1G?
The NCP580SQ18T1G supports a maximum input voltage of 6.5 V under absolute maximum ratings, with recommended operating input range of 2.2 V to 6.0 V. Exceeding 6.5 V risks permanent damage; operation above 6.0 V is not characterized and may degrade output accuracy or reliability. The NCP580SQ18T1G must be used within these limits to ensure compliance with its specified electrical characteristics.
Does the NCP580SQ18T1G require an external noise-reduction capacitor?
No, the NCP580SQ18T1G achieves 30 µVRMS output noise (10 Hz–100 kHz) without any external noise-reduction capacitor. Its internal design eliminates the need for a bypass pin or external RC network, simplifying layout and reducing BOM count. This specification is verified per the NCP580SQ18T1G datasheet test conditions and applies across the full operating temperature range.
What is the minimum output capacitance required for stability with the NCP580SQ18T1G?
The NCP580SQ18T1G requires a minimum 2.2 µF ceramic output capacitor for guaranteed stability and optimal transient response. Using less than this value may cause oscillation or excessive overshoot during load steps. The capacitor must be placed physically adjacent to the Vout and GND pins, with short, low-inductance traces - as confirmed in the NCP580SQ18T1G application information section.
How does the enable (CE) pin function on the NCP580SQ18T1G?
The CE pin on the NCP580SQ18T1G is active-high: the device regulates when CE ≥1.5 V (min), and enters ultra-low-power shutdown (ISD = 0.1 µA typ.) when CE ≤0.3 V. No external pull-up is required if driven by a 1.8 V GPIO; the NCP580SQ18T1G interprets logic-high correctly without level-shifting. This behavior is explicitly defined in the NCP580SQ18T1G pin function table and electrical characteristics.
Is the NCP580SQ18T1G compatible with ceramic capacitors only, or can tantalum be used?
The NCP580SQ18T1G is optimized for ceramic output capacitors (≥2.2 µF, X5R/X7R dielectric) and specifies stability and transient performance based on their low ESR. Tantalum capacitors are not recommended due to higher ESR and potential failure modes under surge conditions; using them may violate the NCP580SQ18T1G's stability criteria and invalidate the 12 mV load regulation spec.
NCP580SQ18T1G 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 120mA
- Current - Output:
- 120mA
- Current - Quiescent (Iq):
- 160 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP580SQ18T1G FAQ
1.How can I place an order for NCP580SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP580SQ18T1G 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 NCP580SQ18T1G reliable?
The price and inventory of NCP580SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP580SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP580SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP580SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP580SQ18T1G?
NCP580SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP580SQ18T1G 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 NCP580SQ18T1G?
For technical support, including NCP580SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP580SQ18T1G requirements.
6.How does Aetrix verify that NCP580SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP580SQ18T1G 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 NCP580SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP580SQ18T1G?
All NCP580SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP580SQ18T1G, 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 NCP580SQ18T1G part is unused and in its original packaging.
Return procedure for NCP580SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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