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onsemi NCP662SQ18T1
- Part No.:
- NCP662SQ18T1
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP662SQ18T1.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
NCP662SQ18T1 from onsemi is a fixed-output, CMOS-based low-dropout linear regulator delivering 1.8 V at up to 100 mA with ultra-low quiescent current (2.5 µA typical), integrated enable control, and ±2.0% output voltage accuracy over −40 °C to +85 °C. It serves as a primary power rail for low-power microcontrollers and sensors in portable instrumentation.
For engineers reviewing the NCP662SQ18T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 100 mA (max 500 mV), SC-82AB package footprint compatibility, thermal shutdown behavior, and enable threshold validation (1.3 V logic high, 0.5 V logic low).
Technical Context
The NCP662SQ18T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown) in a single die. Its enable input directly controls internal biasing to achieve 0.1 µA shutdown current, while line and load regulation are maintained within 20 mV across full operating conditions.
This device operates with ceramic output capacitors as low as 0.1 µF and supports input voltages from 2.8 V to 6.0 V. Dropout is defined at 3.0% output deviation - for the 1.8 V variant, this occurs at ≤500 mV differential (Vin − Vout) under 100 mA load and 25 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% (ensures stable core supply for 1.8 V I/O domains) |
| Max Output Current | 100 mA (supports single-core MCUs, BLE SoCs, and analog sensor signal chains) |
| Quiescent Current | 2.5 µA typical (enables >1-year battery life in always-on wake-up circuits) |
| Dropout Voltage | 500 mV max at 100 mA (allows operation from single-cell Li-ion or two-cell alkaline) |
| Enable Threshold | VTH(HI) = 1.3 V, VTH(LO) = 0.5 V (compatible with 1.8 V GPIO without level shifting) |
| Operating Temp | −40 °C to +85 °C (qualified for industrial and consumer portable equipment) |
| Input Voltage Range | 2.8 V to 6.0 V (covers wide battery discharge profiles and USB-powered systems) |
Pinout & Package
The NCP662SQ18T1 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 and exposed thermal pad (not electrically connected). Package dimensions comply with JEDEC MO-252.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference; must be low-impedance connection to PCB ground plane |
| 2 | Vin | Input supply pin; requires local 1.0 µF ceramic decoupling capacitor |
| 3 | Vout | Regulated 1.8 V output; minimum 0.1 µF ceramic capacitor required for stability |
| 4 | Enable | Active-high digital control; pull to Vin for ON, to GND for <0.1 µA shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.5 µA typical operating current enables multi-year coin-cell operation |
| Enable Control | Digital ON/OFF via pin 4 eliminates need for external MOSFET switch or power sequencer |
| Ceramic Cap Compatible | Stable with 0.1 µF–10 µF ceramic output capacitors - no ESR requirements |
| Thermal Shutdown | Internal protection activates at ~160 °C junction temperature, preventing permanent damage |
| ±2.0% Accuracy | Tight initial tolerance ensures reliable 1.8 V logic interface compliance without post-production trimming |
Applications
| Portable Medical Sensors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE transmission and electrochemical sensing front-end. IC Role / Device Role / Timing Role: Primary 1.8 V supply for ultra-low-power MCU and analog front-end ASIC. Use Value: 2.5 µA quiescent current extends CR2032 battery life beyond 18 months in standby mode. |
Use Scenario: Rugged barcode scanner used in warehouse logistics with intermittent scanning duty cycle. IC Role / Device Role / Timing Role: Regulated 1.8 V rail for image sensor interface and flash memory I/O. Use Value: 500 mV dropout allows direct operation from partially discharged 3.7 V Li-ion cells down to 2.3 V. |
| Automotive Cabin Controllers | IoT Edge Node Gateways |
Use Scenario: HVAC control panel with touch interface and CAN communication, operating in passenger cabin environment. IC Role / Device Role / Timing Role: Secondary 1.8 V supply for capacitive touch controller and CAN transceiver I/O buffer. Use Value: −40 °C to +85 °C rating ensures reliability across automotive ambient extremes without derating. |
Use Scenario: Battery-powered LoRaWAN gateway deployed in remote field monitoring applications. IC Role / Device Role / Timing Role: Always-on 1.8 V supply for real-time clock, wake-up timer, and RF SoC sleep-state retention. Use Value: Enable pin allows host MCU to gate power to peripherals, reducing system-level sleep current to sub-µA levels. |
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 | No enable pin; 1.6 µA IQ; 250 mV dropout at 250 mA; SOT-23-3 package | Lacks active control - requires external FET for power gating; higher current capability but larger footprint | Select when enable functionality is unnecessary and lower dropout at higher loads is prioritized |
| TPS7A0518PDBVR | 250 nA IQ; 170 mV dropout at 100 mA; 1.8 V fixed; SOT-23-5 with enable and active-low reset | Lower IQ and dropout, but requires 1.7 V min input - incompatible with <2.8 V sources | Prefer for ultra-long-life applications where input stays ≥2.8 V and reset signaling is needed |
Compared with NCP662SQ18T1, MCP1700T-1802E/TT offers higher output current but no enable function, while TPS7A0518PDBVR delivers dramatically lower IQ and dropout but mandates higher minimum input voltage - making NCP662SQ18T1 optimal for 1.8 V regulation from marginal battery sources with digital power control.
Availability
NCP662SQ18T1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld scanners, and automotive cabin controllers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NCP662SQ18T1 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, with leadership in power management, analog, and sensor technologies.
The NCP662SQ18T1 belongs to onsemi's NCP662/NCP663 family of ultra-low-IQ LDOs, designed specifically for battery-powered portable equipment where extended runtime and minimal board space are critical.
FAQ
What is the maximum input voltage for the NCP662SQ18T1?
The NCP662SQ18T1 supports an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 1.8 V regulation, Vin must remain ≥2.8 V to maintain dropout margin - typical use cases include single-cell Li-ion (3.0–4.2 V) and two-cell alkaline (2.4–3.2 V) sources.
Does the NCP662SQ18T1 require an external capacitor on the enable pin?
No, the NCP662SQ18T1 does not require an external capacitor on the enable pin. The enable input is CMOS-compatible and internally biased; it functions reliably with direct connection to MCU GPIO or a simple pull-up resistor to Vin. Adding capacitance may slow turn-on response but is not necessary for stability.
Can the NCP662SQ18T1 operate with a 0.1 µF ceramic output capacitor?
Yes - the NCP662SQ18T1 is explicitly characterized and guaranteed stable with a minimum 0.1 µF ceramic output capacitor. This eliminates ESR constraints and simplifies layout. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection, but 0.1 µF meets all stability requirements per the datasheet.
What is the thermal shutdown threshold of the NCP662SQ18T1?
The NCP662SQ18T1 incorporates internal thermal protection that activates at approximately 160 °C junction temperature. Once triggered, the regulator shuts down until junction temperature falls below the hysteresis threshold (~140 °C), then resumes normal operation. This protects against sustained overload or poor PCB thermal design.
Is the NCP662SQ18T1 pin-compatible with other variants in the NCP662 series?
Yes - all NCP662 variants (e.g., NCP662SQ15T1G, NCP662SQ25T1G, NCP662SQ33T1G) share identical SC-82AB pinout and package dimensions. Only the output voltage and top-marking differ. This allows drop-in replacement during design iteration or BOM optimization without PCB changes.
NCP662SQ18T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- 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):
- 0.7V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 6 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-82AB
NCP662SQ18T1 FAQ
1.How can I place an order for NCP662SQ18T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP662SQ18T1 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 NCP662SQ18T1 reliable?
The price and inventory of NCP662SQ18T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP662SQ18T1 is usually 5 days.
3.What payment methods are accepted for NCP662SQ18T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP662SQ18T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP662SQ18T1?
NCP662SQ18T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP662SQ18T1 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 NCP662SQ18T1?
For technical support, including NCP662SQ18T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP662SQ18T1 requirements.
6.How does Aetrix verify that NCP662SQ18T1 is sourced from the original manufacturer or authorized distributors?
All NCP662SQ18T1 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 NCP662SQ18T1 meets industry standards.
7.What is the process for return or replacement of NCP662SQ18T1?
All NCP662SQ18T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP662SQ18T1, 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 NCP662SQ18T1 part is unused and in its original packaging.
Return procedure for NCP662SQ18T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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