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onsemi NCP612SQ31T2G
- Part No.:
- NCP612SQ31T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP612SQ31T2G.pdf
- Description:
- IC REG LINEAR 3.1V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,480
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Product details
Overview
NCP612SQ31T2G from onsemi is a fixed-output CMOS low-dropout linear voltage regulator delivering 3.1 V at up to 100 mA, featuring 40 µA typical quiescent current, 210 mV dropout at 100 mA, and ±2.0% output voltage accuracy over −40 °C to +85 °C - designed for battery-powered portable electronics requiring ultra-low power consumption and stable low-voltage rail generation.
For engineers reviewing the NCP612SQ31T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC70-5 package footprint, enable-controlled standby mode, ceramic-capacitor compatibility, and thermal-limited 330 mW max power dissipation at 25 °C ambient.
Technical Context
The NCP612SQ31T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown) in a single die. It operates as a low-noise, low-IQ LDO with no external compensation required due to internal stability design for 1.0 µF ceramic output capacitors.
Its enable input supports logic-level control (VTH(en) = 0.95 V high, 0.3 V low), and it achieves 70 dB ripple rejection at 100 Hz while maintaining <100 µVRMS output noise (100 Hz–100 kHz) under 30 mA load - critical for powering RF sections and precision analog circuitry in compact handheld systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.1 V ±2.0% (ensures stable MCU core or sensor bias rail within tight tolerance) |
| Max Output Current | 100 mA (supports low-power microcontrollers, sensors, and RF transceivers) |
| Quiescent Current | 40 µA typical (enables >1-year battery life in always-on IoT endpoints) |
| Dropout Voltage | 210 mV at 100 mA (allows operation down to 3.31 V input for 3.1 V output) |
| Operating Temp Range | −40 °C to +85 °C (suitable for consumer and industrial portable equipment) |
| Package | SC70-5 (1.25 mm × 2.1 mm footprint; enables ultra-compact PCB layouts) |
| Thermal Shutdown | Activates at ~160 °C (prevents permanent damage during transient overload or poor heatsinking) |
Pinout & Package
Supplied in the SC70-5 (Case 419A) surface-mount package - a 5-pin, lead-free, micro-miniature outline measuring 1.25 mm × 2.1 mm × 0.95 mm with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply (0–6.0 V); requires local 1.0 µF decoupling capacitor |
| 2 | Gnd | Power ground reference; must be low-impedance connection to minimize noise coupling |
| 3 | Enable | Active-high digital control input; pulls low to disable regulator and reduce IQ to <0.03 µA |
| 4 | N/C | No internal connection; left unconnected or tied to Gnd per layout best practice |
| 5 | Vout | Regulated 3.1 V output; stable with 1.0 µF ceramic capacitor (ESR 1–5 Ω acceptable) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables multi-year battery life in always-on wearable sensors |
| Low dropout architecture | 210 mV at full 100 mA load allows efficient use of single-cell Li-ion or alkaline sources |
| Ceramic capacitor compatible | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or large electrolytics |
| Integrated thermal protection | Auto-shutdown at ~160 °C prevents failure during sustained overload or poor PCB thermal design |
| Pb-free SC70-5 package | RoHS-compliant 1.25 mm × 2.1 mm footprint supports high-density portable PCB assembly |
Applications
| Cellular Modem Power Rail | Portable Medical Sensor Node |
|---|---|
Use Scenario: Powers LTE-M or NB-IoT modem ICs in battery-operated asset trackers. IC Role / Device Role / Timing Role: Primary 3.1 V LDO supplying modem VCC and RF section; enables fast enable/disable cycling synchronized with transmission bursts. Use Value: 40 µA IQ extends battery life beyond 5 years in sleep mode; 210 mV dropout ensures regulation even as battery discharges to 3.31 V. | Use Scenario: Supplies ADC, temperature sensor, and BLE SoC in handheld clinical thermometer or pulse oximeter. IC Role / Device Role / Timing Role: Low-noise 3.1 V bias source for precision analog front-end and digital subsystem; enabled only during measurement cycles. Use Value: <100 µVRMS output noise avoids signal corruption in sub-mV biomedical measurements; ±2.0% accuracy ensures calibrated reading consistency. |
| Industrial Handheld Scanner | Smart Home Motion Detector |
Use Scenario: Provides regulated 3.1 V to laser diode driver, image sensor, and microcontroller in rugged barcode scanners. IC Role / Device Role / Timing Role: Main system LDO with enable control linked to trigger button press; withstands −40 °C to +85 °C operating range. Use Value: Thermal shutdown protects against overheating during extended scanning; SC70-5 footprint saves space in ergonomically constrained housing. | Use Scenario: Powers PIR sensor signal chain and Zigbee/Thread radio in battery-powered occupancy sensors. IC Role / Device Role / Timing Role: Always-on low-IQ regulator for wake-up circuitry; delivers clean 3.1 V to analog comparator and RF transceiver. Use Value: 70 dB ripple rejection suppresses switching noise from nearby DC-DC converters; 3.1 V output matches optimal supply for common low-power radios. |
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/OT | 3.1 V output, 250 mV dropout at 250 mA, 1.8 µA IQ, SOT-23-5 package | Lower IQ but higher dropout; larger footprint (2.9 mm × 1.6 mm vs. SC70-5's 2.1 mm × 1.25 mm) | Select when ultra-low standby current outweighs size constraints and higher dropout is acceptable. |
| TPS70631DBVR | 3.1 V output, 210 mV dropout at 150 mA, 1.3 µA IQ, SOT-23-5 package | Similar dropout but significantly lower IQ; not AEC-Q100 qualified; same package size disadvantage | Prefer for ultra-low-power designs where SC70-5 footprint is not mandatory and automotive qualification is unnecessary. |
Compared with MCP1700T-3102E/OT and TPS70631DBVR, the NCP612SQ31T2G offers the smallest PCB area (SC70-5), guaranteed ±2.0% output accuracy across temperature, and robust thermal protection - making it optimal for space-constrained, battery-sensitive portable devices where consistent 3.1 V regulation is critical.
Availability
NCP612SQ31T2G is available at Aetrix Electronics and suitable for cellular modems, portable medical sensors, industrial handheld scanners, smart home motion detectors, and battery-powered instrumentation requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP612SQ31T2G 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 NCP612 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated portable electronics demanding ultra-low quiescent current, small footprint, and high output accuracy without external compensation.
FAQ
What is the maximum input voltage rating for the NCP612SQ31T2G?
The NCP612SQ31T2G has an absolute maximum input voltage (Vin) rating of 6.0 V. Exceeding this voltage may cause permanent damage. For reliable operation, Vin should remain within 0 V to 6.0 V, and the recommended operating range is Vout + 1.0 V to 6.0 V - meaning for the 3.1 V output, nominal input is 4.1 V to 6.0 V. The device includes internal protection against overvoltage stress on the Enable pin (−0.3 V to Vin + 0.3 V).
Does the NCP612SQ31T2G require external capacitors, and what values are recommended?
Yes, the NCP612SQ31T2G requires both input (Cin) and output (Cout) decoupling capacitors. The datasheet specifies 1.0 µF ceramic capacitors for both positions - e.g., TDK C1608X5R1A105K - placed as close as possible to the SC70-5 package pins. These values ensure stability, adequate line/load transient response, and noise suppression. Larger values improve performance but are not required for basic functionality.
Is the NCP612SQ31T2G pin-compatible with other variants in the NCP612 family?
Yes, all NCP612 variants - including NCP612SQ15T2G, NCP612SQ33T2G, and NCP612SQ50T2G - share identical SC70-5 pinout and package dimensions. Pin 1 is Vin, Pin 2 is Gnd, Pin 3 is Enable, Pin 4 is N/C, and Pin 5 is Vout. This allows drop-in replacement across output voltages without PCB redesign, provided thermal and electrical requirements are verified for each variant.
What is the thermal shutdown behavior of the NCP612SQ31T2G?
The NCP612SQ31T2G incorporates internal thermal protection that activates at approximately 160 °C junction temperature. When triggered, the regulator shuts down completely - disabling output and reducing ground current to near-zero - until the die cools below the hysteresis threshold (~140 °C). This safeguard prevents irreversible damage during sustained overload, poor PCB thermal design, or ambient temperature excursions.
Can the NCP612SQ31T2G be used in automotive applications?
No - the NCP612SQ31T2G is rated for −40 °C to +85 °C ambient and is not AEC-Q100 qualified. For automotive use, the pin-compatible NCV612SQ31T2G variant must be selected; it shares identical electrical specs but is qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C) and supports PPAP documentation. Using NCP612SQ31T2G in automotive environments risks reliability failure outside its specified temperature range.
NCP612SQ31T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 0.38V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- -
- 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)
NCP612SQ31T2G FAQ
1.How can I place an order for NCP612SQ31T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP612SQ31T2G 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 NCP612SQ31T2G reliable?
The price and inventory of NCP612SQ31T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ31T2G is usually 5 days.
3.What payment methods are accepted for NCP612SQ31T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ31T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP612SQ31T2G?
NCP612SQ31T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP612SQ31T2G 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 NCP612SQ31T2G?
For technical support, including NCP612SQ31T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ31T2G requirements.
6.How does Aetrix verify that NCP612SQ31T2G is sourced from the original manufacturer or authorized distributors?
All NCP612SQ31T2G 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 NCP612SQ31T2G meets industry standards.
7.What is the process for return or replacement of NCP612SQ31T2G?
All NCP612SQ31T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ31T2G, 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 NCP612SQ31T2G part is unused and in its original packaging.
Return procedure for NCP612SQ31T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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