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onsemi NCP512SQ31T1G
- Part No.:
- NCP512SQ31T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ31T1G.pdf
- Description:
- IC REG LINEAR 3.1V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:3,721
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Product details
Overview
NCP512SQ31T1G from onsemi is a fixed-output CMOS low-quiescent-current linear voltage regulator delivering 3.1 V at up to 80 mA, featuring 40 µA typical quiescent current, 170 mV dropout at 80 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring stable low-power biasing.
For engineers reviewing the NCP512SQ31T1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ, SC-88A (SOT-353) package compatibility, enable-controlled standby mode, and ceramic-capacitor stability in space-constrained handheld systems.
Technical Context
The NCP512SQ31T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/current-limit protection - enabling stable regulation with minimal external components. Its enable input supports logic-level control (VTH(en) = 0.3 V low / 1.3 V high), and it operates across −40 °C to +85 °C ambient without external compensation.
Designed for low-ESR ceramic output capacitors (≥1.0 µF), the device achieves 50 dB ripple rejection at 1 kHz and 180 µVRMS output noise (100 Hz–100 kHz). Dropout voltage remains ≤170 mV at full 80 mA load and 3.1 V output, supporting operation from as low as 3.27 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.1 V ±2.0% - ensures precise biasing for 3.3 V-tolerant I/O or low-voltage microcontrollers. |
| Quiescent Current | 40 µA typical - extends battery life in always-on sensor nodes or standby modes. |
| Dropout Voltage | 170 mV at 80 mA - enables regulation from 3.27 V input, critical for single-cell Li-ion or alkaline systems. |
| Load Regulation | 0.3–0.8 mV/mA - maintains tight output stability across dynamic load shifts (e.g., RF transmit bursts). |
| Operating Temp Range | −40 °C to +85 °C - qualified for industrial-grade portable instrumentation and consumer devices. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO. |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - suitable for noise-sensitive analog circuits like ADC references or audio bias rails. |
Pinout & Package
The NCP512SQ31T1G is housed in the SC-88A (SOT-353) surface-mount package - a 5-pin, 2.1 mm × 1.25 mm × 0.95 mm micro-miniature outline compatible with high-density PCB layouts and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 0–6.0 V unregulated input; must be decoupled with ≥1.0 µF ceramic capacitor near the pin. |
| 2 - GND | Power ground reference | Low-impedance return path for both input and output currents; requires solid copper pour for thermal and noise control. |
| 3 - Enable | Logic-controlled on/off input | Pull high to Vin to activate regulator; pull ≤0.3 V to disable and reduce IQ to 0.1 µA - enables system-level power gating. |
| 4 - N/C | No internal connection | Unbonded die pad; must remain floating or grounded per layout best practice - no electrical function. |
| 5 - Vout | Regulated output voltage | Delivers stable 3.1 V ±2% to load; requires ≥1.0 µF ceramic output capacitor placed adjacent to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - reduces standby power loss by >90% vs. standard LDOs, extending shelf life of battery-operated devices. |
| Low-dropout PMOS architecture | 170 mV dropout at 80 mA - sustains regulation under brown-out conditions where input dips close to output voltage. |
| Ceramic-capacitor stability | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for tantalum or aluminum electrolytics, lowering BOM cost and size. |
| Integrated protection | Thermal shutdown (160 °C) and current limiting - prevents damage during overload or PCB trace faults without external circuitry. |
| Pb-free SC-88A package | RoHS-compliant 5-pin SOT-353 - supports automated assembly and meets global environmental compliance requirements. |
Applications
| Wearable Health Sensor Node | Bluetooth Low Energy Module |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Provides clean, low-noise 3.1 V bias rail for analog front-end and MCU core. Use Value: 40 µA IQ enables multi-week operation; 180 µVRMS noise avoids signal corruption in sub-µV bio-potential measurements. |
Use Scenario: Compact BLE peripheral with intermittent radio transmission and deep-sleep cycles. IC Role / Device Role / Timing Role: Regulates 3.1 V supply for BLE SoC and associated peripherals. Use Value: Enable pin synchronizes with host MCU sleep states, reducing system IQ to <1 µA during idle - doubling battery runtime. |
| Industrial Handheld Scanner | Smart Home Motion Detector |
|
Use Scenario: Rugged barcode scanner operating across −20 °C to +70 °C ambient with Li-ion pack. IC Role / Device Role / Timing Role: Supplies regulated 3.1 V to laser driver, image sensor, and decode processor. Use Value: −40 °C to +85 °C rating ensures reliability in warehouse environments; 170 mV dropout allows use down to 3.27 V input as battery discharges. |
Use Scenario: Battery-powered PIR sensor node transmitting occupancy data via Zigbee or Thread. IC Role / Device Role / Timing Role: Powers ultra-low-power MCU, RF transceiver, and analog signal chain. Use Value: Ceramic-capacitor compatibility eliminates electrolytic aging failure; SC-88A footprint saves >30% board area vs. SOT-23 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3102E/TT | 3.1 V output, 2.5 µA IQ, but only 250 mA max output current and higher 600 mV dropout at 250 mA. | Better for ultra-low-IQ applications with light loads (<10 mA); less suitable for sustained 80 mA loads due to thermal limits. | Select if standby current is paramount and peak load ≤25 mA; verify thermal derating in enclosed enclosures. |
| Torex XC6206P312MR-G | 3.1 V output, 1 µA IQ, SC-88A package, but only 150 mA max output and no enable pin. | Lacks active enable control - requires external FET for full system power gating; lower IQ but no logic interface. | Choose when enable functionality is unnecessary and lowest possible IQ dominates; confirm absence of enable meets system architecture. |
Compared with MCP1700T-3102E/TT and XC6206P312MR-G, the NCP512SQ31T1G uniquely balances 80 mA continuous capability, 40 µA IQ, integrated enable, and 170 mV dropout - making it optimal for medium-load, battery-critical portable systems needing both efficiency and controllability.
Availability
NCP512SQ31T1G is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth LE modules, and industrial handheld scanners requiring stable component supply with consistent Pb-free SC-88A packaging and long-term production support.
Supply support for NCP512SQ31T1G 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 specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and portable electronics.
The NCP512 series belongs to onsemi's low-power linear regulator product line - engineered specifically for battery-constrained applications demanding ultra-low quiescent current, small footprint, and ceramic-capacitor compatibility without sacrificing load capability or thermal robustness.
FAQ
What is the maximum input voltage rating for the NCP512SQ31T1G?
The NCP512SQ31T1G has an absolute maximum input voltage (Vin) of 6.0 V. Operation above this level risks permanent damage. For reliable 3.1 V output regulation, the recommended input range is 3.27 V to 6.0 V - ensuring sufficient headroom above the 170 mV dropout while staying within safe operating limits.
Does the NCP512SQ31T1G require an external enable pull-up resistor?
No, the NCP512SQ31T1G does not require an external pull-up on the Enable pin. If enable functionality is unused, the datasheet specifies connecting Enable directly to Vin - which internally biases the control circuit and activates regulation. Adding a resistor introduces unnecessary leakage and board area.
Can the NCP512SQ31T1G be used with a 0.47 µF output capacitor?
No - the NCP512SQ31T1G requires a minimum 1.0 µF ceramic output capacitor for guaranteed stability per the datasheet. Using 0.47 µF may cause oscillation or poor transient response, especially under load steps. TDK C1608X5R1A105K (1.0 µF, X5R, 10 V) is a validated option.
What is the thermal shutdown threshold of the NCP512SQ31T1G?
The NCP512SQ31T1G incorporates thermal protection that activates at approximately 160 °C junction temperature, disabling the output until the die cools. This safeguard prevents catastrophic failure during sustained overload or inadequate PCB copper area - and the device resumes normal operation automatically once TJ falls below the hysteresis threshold.
Is the NCP512SQ31T1G pin-compatible with other variants in the NCP512 family?
Yes - all NCP512 variants including NCP512SQ31T1G share identical SC-88A (SOT-353) pinout and package dimensions. The only differences are output voltage (3.1 V for NCP512SQ31T1G) and top-marking code (LFO). This allows drop-in replacement across voltages when board layout and BOM support the required output level.
NCP512SQ31T1G 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):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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)
NCP512SQ31T1G FAQ
1.How can I place an order for NCP512SQ31T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ31T1G 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 NCP512SQ31T1G reliable?
The price and inventory of NCP512SQ31T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ31T1G is usually 5 days.
3.What payment methods are accepted for NCP512SQ31T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ31T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ31T1G?
NCP512SQ31T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ31T1G 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 NCP512SQ31T1G?
For technical support, including NCP512SQ31T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ31T1G requirements.
6.How does Aetrix verify that NCP512SQ31T1G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ31T1G 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 NCP512SQ31T1G meets industry standards.
7.What is the process for return or replacement of NCP512SQ31T1G?
All NCP512SQ31T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ31T1G, 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 NCP512SQ31T1G part is unused and in its original packaging.
Return procedure for NCP512SQ31T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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