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onsemi NCP663SQ25T1G
- Part No.:
- NCP663SQ25T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP663SQ25T1G.pdf
- Description:
- IC REG LINEAR 2.5V 100MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
NCP663SQ25T1G from onsemi is a fixed-output, 2.5 V, 100 mA CMOS low-dropout linear regulator in SC-82AB package, featuring 2.5 µA typical quiescent current, ±2.0% output voltage accuracy, and dropout voltage of 300 mV at 100 mA - designed for battery-powered portable instrumentation requiring ultra-low standby power.
For engineers reviewing the NCP663SQ25T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.5 V fixed output, SC-82AB footprint compatibility, absence of enable functionality (N/C pin), thermal shutdown protection, and support for 0.1 µF ceramic output capacitors in space-constrained designs.
Technical Context
The NCP663SQ25T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection circuits - enabling stable regulation without external compensation. It operates across −40 °C to +85 °C ambient temperature and supports input voltages up to 6.0 V.
Unlike the NCP662 variant, the NCP663 series omits the enable pin (Pin 4 = N/C) and relies solely on input voltage control for operation. Its ultra-low 2.5 µA quiescent current is maintained across full temperature range, making it suitable for always-on subsystems in portable electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.0% - ensures stable supply for 2.5 V logic, sensors, or RF front-end biasing without external feedback. |
| Max Output Current | 100 mA - sufficient for microcontrollers, ADCs, or small displays in handheld devices. |
| Dropout Voltage | 300 mV at 100 mA - allows operation down to 2.8 V input while maintaining 2.5 V output, extending battery runtime. |
| Quiescent Current | 2.5 µA typical - minimizes battery drain during sleep mode in battery-powered instruments. |
| Input Voltage Range | Up to 6.0 V - compatible with single-cell Li-ion (4.2 V max), two-cell alkaline (3.2 V), or regulated 5 V rails. |
| Output Capacitor Min. | 0.1 µF ceramic - enables use of tiny, low-ESR MLCCs, reducing board area and cost vs. tantalum alternatives. |
| Thermal Protection | Internal shutdown at ~160 °C - prevents damage during transient overloads or poor PCB thermal design. |
Pinout & Package
The NCP663SQ25T1G is housed in the SC-82AB (Case 419C) surface-mount package - a 4-pin, 2.0 × 1.25 mm micro-miniature outline with 0.65 mm pitch, optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference; must be connected to low-impedance system ground plane to ensure stability and noise immunity. |
| 2 | Vin | Input supply pin; accepts 2.8–6.0 V; requires local 1.0 µF ceramic decoupling capacitor placed adjacent to pin. |
| 3 | Vout | Regulated 2.5 V output; drives load directly; requires 0.1 µF minimum ceramic capacitor at pin for stability. |
| 4 | N/C | No internal connection - must remain unconnected; not usable as enable or any other function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 2.5 µA typical - extends shelf life and operational time in battery-backed memory or real-time clock circuits. |
| Fixed 2.5 V output | ±2.0% accuracy over −40 °C to +85 °C - eliminates need for external resistor network and reduces BOM count. |
| SC-82AB package | 2.0 × 1.25 mm footprint - saves >60% board area vs. SOT-23, critical for wearables and compact medical sensors. |
| Stable with 0.1 µF ceramic cap | No ESR requirement - simplifies layout, avoids tantalum reliability concerns, and lowers total solution cost. |
| Thermal & current protection | Internally limits power dissipation and shuts down above ~160 °C - removes need for external thermal monitoring circuitry. |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
|
Use Scenario: Powering optical heart-rate sensor ICs and analog front-ends in disposable patch monitors. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying analog signal chain and low-power MCU core. Use Value: 2.5 µA quiescent current preserves battery life for multi-week continuous operation; 300 mV dropout enables use of partially depleted coin cells. |
Use Scenario: Regulating supply for accelerometer, gyroscope, and BLE SoC in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Standby-mode voltage source ensuring fast wake-up from deep-sleep states. Use Value: Fixed 2.5 V output matches common I/O voltage of MEMS sensors and BLE radios; SC-82AB footprint fits tight wearable form factors. |
| Handheld Test Instruments | Industrial Data Loggers |
|
Use Scenario: Providing clean 2.5 V reference and analog supply for 12-bit SAR ADCs in pocket multimeters. IC Role / Device Role / Timing Role: Low-noise analog rail generator isolated from digital switching noise. Use Value: 100 µVrms output noise (typ.) and ±2.0% accuracy meet metrology-grade measurement requirements without post-regulation filtering. |
Use Scenario: Powering microcontroller, RTC, and flash memory in battery-operated environmental data loggers deployed for months. IC Role / Device Role / Timing Role: Always-on regulator maintaining RTC and SRAM retention during main system shutdown. Use Value: 2.5 µA IQ enables >10-year battery life with CR2032; thermal protection prevents field failure in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250 mA output, 1.6 µA IQ, SOT-23-3 package (no GND pin exposed); no thermal shutdown. | Higher current headroom but lacks integrated thermal protection and has different pinout. | Select when >100 mA load or smaller 3-pin footprint is required; verify thermal margin manually. |
| TPS70625DBVR | 200 mA output, 1.7 µA IQ, enable pin included, SOT-23-5 package; AEC-Q100 Grade 3 qualified. | Includes enable control and automotive qualification; larger package and higher cost. | Select when system-level ON/OFF sequencing or automotive qualification is mandatory. |
Compared with MCP1700T-2502E/TT and TPS70625DBVR, the NCP663SQ25T1G offers optimal balance of ultra-low IQ, integrated thermal safety, and minimal 4-pin SC-82AB footprint - ideal for cost-sensitive, space-constrained portable instrumentation where enable control is unnecessary.
Availability
NCP663SQ25T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, handheld test instruments, industrial data loggers, and battery-powered instrumentation requiring stable component supply with long-term lifecycle assurance.
Supply support for NCP663SQ25T1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP663SQ25T1G belongs to onsemi's NCP663 family of ultra-low-IQ LDOs - engineered specifically for battery-powered portable equipment where extended operating life and minimal PCB area are critical design constraints.
FAQ
What is the maximum input voltage rating for the NCP663SQ25T1G?
The NCP663SQ25T1G has an absolute maximum input voltage of 6.0 V. Exceeding this rating may cause permanent damage. For reliable operation, Vin should be kept within 2.8 V to 6.0 V to maintain regulation at 2.5 V output - especially important when powering from single-cell Li-ion or dual alkaline sources. The NCP663SQ25T1G datasheet specifies this limit under Maximum Ratings on page 2.
Does the NCP663SQ25T1G include an enable pin?
No, the NCP663SQ25T1G does not include an enable pin. Pin 4 is marked N/C (No internal connection) per the datasheet pin function table and top-view diagram on page 1. This distinguishes it from the NCP662 variant, which uses Pin 4 as Enable. The NCP663SQ25T1G is always active when valid input voltage is applied to Pin 2 (Vin).
What output capacitor value is required for stable operation of the NCP663SQ25T1G?
The NCP663SQ25T1G requires a minimum output capacitor of 0.1 µF ceramic. The datasheet confirms stability across ESR values from a few milliohms up to 10 Ω, allowing flexibility in capacitor selection. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection - as demonstrated in Figures 10 and 11 of the NCP663SQ25T1G datasheet.
What is the dropout voltage of the NCP663SQ25T1G at full load?
The dropout voltage of the NCP663SQ25T1G is 300 mV typical at 100 mA load and 25 °C, measured when Vout drops 3.0% below nominal (i.e., to 2.425 V). This value increases slightly at temperature extremes and higher loads - reaching up to 500 mV maximum across −40 °C to +85 °C, per Electrical Characteristics Table on page 3 of the datasheet.
Is the NCP663SQ25T1G RoHS-compliant and lead-free?
Yes, the NCP663SQ25T1G is Pb-free and RoHS-compliant. The "G" suffix in the part number explicitly denotes lead-free packaging, and the datasheet confirms Pb-free packages are available for the entire NCP663 series. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements and is qualified for reflow soldering per industry standards.
NCP663SQ25T1G 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 6 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP663SQ25T1G FAQ
1.How can I place an order for NCP663SQ25T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP663SQ25T1G 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 NCP663SQ25T1G reliable?
The price and inventory of NCP663SQ25T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP663SQ25T1G is usually 5 days.
3.What payment methods are accepted for NCP663SQ25T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP663SQ25T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP663SQ25T1G?
NCP663SQ25T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP663SQ25T1G 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 NCP663SQ25T1G?
For technical support, including NCP663SQ25T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP663SQ25T1G requirements.
6.How does Aetrix verify that NCP663SQ25T1G is sourced from the original manufacturer or authorized distributors?
All NCP663SQ25T1G 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 NCP663SQ25T1G meets industry standards.
7.What is the process for return or replacement of NCP663SQ25T1G?
All NCP663SQ25T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP663SQ25T1G, 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 NCP663SQ25T1G part is unused and in its original packaging.
Return procedure for NCP663SQ25T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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