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onsemi NCP612SQ18T2
- Part No.:
- NCP612SQ18T2
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP612SQ18T2.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
NCP612SQ18T2 from onsemi is a 1.8 V fixed-output CMOS low-quiescent-current linear voltage regulator in SC70-5 package, delivering up to 100 mA output current with 40 µA typical quiescent current and 230 mV dropout at 100 mA - designed for battery-powered portable electronics requiring ultra-low standby power.
For engineers reviewing the NCP612SQ18T2 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 2.0% output voltage accuracy over −40°C to +85°C, enable-controlled shutdown, compatibility with low-ESR ceramic capacitors, and thermal protection up to +150°C junction temperature.
Technical Context
The NCP612SQ18T2 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-dropout regulator with no external compensation required.
Its enable input provides logic-level control (VTH(HI) = 0.95 V, VTH(LO) = 0.3 V), allowing system-level power sequencing. The device maintains regulation down to 1.8 V output while supporting input voltages up to 6.0 V, with line regulation of ≤3.0 mV/V and load regulation of ≤0.8 mV/mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% (guaranteed over −40°C to +85°C, 10 mA load) |
| Quiescent Current | 40 µA typical (enables >1-year battery life in always-on sensor nodes) |
| Dropout Voltage | 230 mV at 100 mA (allows operation from 2.03 V input when VOUT = 1.8 V) |
| Max Output Current | 100 mA (with ≥3% output voltage drop specification) |
| Enable Threshold | 0.95 V (min logic-high turn-on; 0.3 V max logic-low turn-off) |
| Thermal Shutdown | Activates at ~160°C (protects against sustained overload or poor PCB thermal design) |
| Noise Performance | 100 µVRMS (100 Hz–100 kHz, 30 mA load, 1 µF output cap) |
Pinout & Package
Package: SC70-5 (Case 419A-02), micro-miniature surface-mount package measuring 2.00 × 1.25 × 0.90 mm (L × W × H), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply rail; accepts 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; pulled high to Vin for normal operation; pulled low to disable regulator and reduce IQ to ≤0.03 µA |
| 4 | N/C | No internal connection; must remain unconnected or floating (not tied to any net) |
| 5 | Vout | Regulated 1.8 V output; supports ceramic or tantalum output capacitors ≥1.0 µF with ESR up to 5 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables multi-year operation from coin-cell batteries in IoT endpoints |
| Low dropout architecture | PMOS pass element eliminates reverse current flow and ensures stable regulation near input rail |
| Enable-controlled shutdown | Reduces total system standby current by disabling LDO output without removing input supply |
| Ceramic capacitor compatible | No minimum ESR requirement allows use of small, low-cost 0402/0603 X5R/X7R MLCCs |
| Integrated protection | Current limiting and thermal shutdown prevent damage during fault conditions without external components |
Applications
| Wearable Health Sensors | Bluetooth Low Energy Peripherals |
|---|---|
|
Use Scenario: Continuous ECG/PPG monitoring in wrist-worn devices powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.8 V supply for ultra-low-power MCU and analog front-end ASIC. Use Value: 40 µA quiescent current extends battery life beyond 2 years while maintaining 2.0% output accuracy across body-temperature range. |
Use Scenario: Power management for BLE beacon modules operating intermittently in retail asset tracking. IC Role / Device Role / Timing Role: Regulated 1.8 V rail for Bluetooth radio and flash memory during active transmission bursts. Use Value: 230 mV dropout enables full functionality even as battery voltage drops to 2.03 V, maximizing usable cell capacity. |
| Industrial Wireless Sensor Nodes | Portable Diagnostic Handhelds |
|
Use Scenario: Battery-backed environmental sensor node deployed in remote locations with 10-year field life target. IC Role / Device Role / Timing Role: Always-on 1.8 V supply for real-time clock, low-power MCU, and RF transceiver sleep mode. Use Value: Enable pin allows host MCU to gate power to peripheral ICs, reducing system-wide leakage to sub-µA levels. |
Use Scenario: Portable ultrasound or glucose meter using single-cell Li-ion with tight voltage margin requirements. IC Role / Device Role / Timing Role: Precision 1.8 V reference source for ADC and digital logic subsystems. Use Value: 100 µVRMS output noise and <100 ppm/°C tempco ensure stable analog measurement accuracy across operating temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/MB | 4 µA IQ, 6 V max input, SC70-5, but only 250 mA max output and higher dropout (600 mV @ 250 mA) | Better for ultra-deep-sleep systems; less suitable for 100 mA continuous loads due to thermal limits | Prefer NCP612SQ18T2 when 100 mA sustained current and 230 mV dropout are required |
| Torex XC6206P182MR-G | 1.0 µA IQ, SOT-25, 150 mA output, but only 2.0% accuracy over 0°C–70°C (not −40°C–85°C) | Lower cost for commercial-temp consumer products; not qualified for extended industrial temperature range | Prefer NCP612SQ18T2 when full −40°C to +85°C operation and automotive-grade reliability are needed |
Compared with MCP1700T-1802E/MB and XC6206P182MR-G, the NCP612SQ18T2 uniquely balances 100 mA capability, 230 mV dropout, 40 µA IQ, and guaranteed −40°C to +85°C performance in SC70-5 - making it optimal for space- and power-constrained industrial and medical portable designs.
Availability
NCP612SQ18T2 is available at Aetrix Electronics and suitable for wearable health sensors, BLE peripherals, and industrial wireless sensor nodes requiring stable component supply with long-term lifecycle support and Pb-free compliance.
Supply support for NCP612SQ18T2 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 sensing technologies.
The NCP612 series belongs to onsemi's ultra-low-IQ linear regulator product line, engineered specifically for battery-powered portable equipment where standby current, small footprint, and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for the NCP612SQ18T2?
The NCP612SQ18T2 has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 1.8 V output regulation, the recommended input range is 2.03 V to 6.0 V - ensuring sufficient headroom above dropout voltage while staying within safe operating limits. The device includes internal protection against transient overvoltage events up to specified stress ratings.
Does the NCP612SQ18T2 require external compensation components?
No, the NCP612SQ18T2 is internally compensated and stable with 1.0 µF ceramic or tantalum output capacitors. Its design eliminates the need for external resistors, capacitors, or ESR tuning - simplifying layout and reducing BOM count. This stability holds across the full 1–5 Ω ESR range and with output capacitance values ≥1.0 µF, as verified in the datasheet's APPLICATIONS INFORMATION section.
Can the NCP612SQ18T2 be used with a 1.0 µF ceramic capacitor on the output?
Yes, the NCP612SQ18T2 is explicitly characterized and guaranteed stable with 1.0 µF ceramic capacitors (e.g., TDK C1608X5R1A105K), including low-ESR types. Unlike many older LDOs, it imposes no minimum ESR requirement - enabling use of compact, low-cost MLCCs in 0402 and 0603 packages without risk of oscillation or degraded transient response.
What is the function of Pin 4 (N/C) on the NCP612SQ18T2?
Pin 4 of the NCP612SQ18T2 is designated N/C (No Connection) and has no internal bond wire or circuit connection. It must remain unconnected - neither tied to ground, supply, nor any other net. Leaving it floating is electrically safe and matches the manufacturer's pin function description in the datasheet. Connecting it may introduce parasitic coupling or violate package mechanical integrity.
How does the enable pin affect quiescent current in the NCP612SQ18T2?
When the enable pin is pulled low (≤0.3 V), the NCP612SQ18T2 enters shutdown mode with quiescent current reduced to ≤0.03 µA - over 1,000× lower than its 40 µA operating IQ. This deep-sleep state disables the output and halts internal bias circuits. If unused, the enable pin must be tied directly to Vin to ensure normal operation; floating the pin is not recommended due to potential noise-induced toggling.
NCP612SQ18T2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- 0.56V @ 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)
NCP612SQ18T2 FAQ
1.How can I place an order for NCP612SQ18T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP612SQ18T2 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 NCP612SQ18T2 reliable?
The price and inventory of NCP612SQ18T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ18T2 is usually 5 days.
3.What payment methods are accepted for NCP612SQ18T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ18T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP612SQ18T2?
NCP612SQ18T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP612SQ18T2 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 NCP612SQ18T2?
For technical support, including NCP612SQ18T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ18T2 requirements.
6.How does Aetrix verify that NCP612SQ18T2 is sourced from the original manufacturer or authorized distributors?
All NCP612SQ18T2 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 NCP612SQ18T2 meets industry standards.
7.What is the process for return or replacement of NCP612SQ18T2?
All NCP612SQ18T2 units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ18T2, 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 NCP612SQ18T2 part is unused and in its original packaging.
Return procedure for NCP612SQ18T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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