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onsemi NCP612SQ18T1G
- Part No.:
- NCP612SQ18T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP612SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:4,802
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Product details
Overview
NCP612SQ18T1G from onsemi is a fixed-output CMOS low-dropout linear voltage regulator delivering 100 mA at 1.8 V with ultra-low 40 µA quiescent current, 230 mV dropout at full load, ±2.0% output voltage accuracy, and operation across −40 °C to +85 °C - designed for battery-powered portable electronics requiring stable, low-power biasing of microcontrollers and sensors.
For engineers reviewing the NCP612SQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance under 100 mA load, thermal behavior in SC70-5 layout, enable-controlled standby capability, and compatibility with 1.0 µF ceramic input/output capacitors without ESR constraints.
Technical Context
The NCP612SQ18T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal protection circuits (current limit, thermal shutdown) in a single SC70-5 package. Its architecture enables stable regulation with minimal external components and no ESR dependency on output capacitance.
It features an active-high Enable pin with 0.95 V turn-on threshold and 0.3 V turn-off threshold, allowing precise system-level power sequencing. The device draws only 40 µA ground current at light load and maintains 1.8 V output within ±2.0% over temperature and line/load variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.0% over −40 °C to +85 °C and 1–100 mA load - ensures reliable core logic supply for low-voltage MCUs. |
| Max Output Current | 100 mA continuous - sufficient for sensor interfaces, RF front-ends, and small microcontroller domains. |
| Dropout Voltage | 230 mV at 100 mA and 1.8 V output - enables operation from 2.03 V input, supporting single-cell Li-ion or two-cell alkaline sources. |
| Quiescent Current | 40 µA typical at no load - extends battery life in always-on wearable and IoT edge nodes. |
| Enable Threshold | 0.95 V (rising), 0.3 V (falling) - compatible with 1.8 V GPIOs and supports clean power gating without external level shifters. |
| Input Voltage Range | 0 to 6.0 V - accommodates wide input rails including USB, boost converters, and multi-cell batteries. |
| Thermal Shutdown | Activates at ~160 °C junction - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
Package: SC70-5 (Case 419A), micro-miniature surface-mount, 1.25 mm × 2.1 mm footprint, 0.95 mm height - optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply rail - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin. |
| 2 | Gnd | Power ground reference - requires low-impedance connection to PCB ground plane to minimize noise coupling. |
| 3 | Enable | Active-high digital control input - pulled high to Vin for operation; pulled low to disable output and reduce IQ to <1 µA. |
| 4 | N/C | No internal connection - left unconnected; not to be tied to any net or used as thermal pad. |
| 5 | Vout | Regulated 1.8 V output - requires ≥1.0 µF ceramic capacitor; ESR from 0.005 Ω to 5 Ω is acceptable per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - enables >1-year battery life in coin-cell-powered devices operating at 10 µA average system current. |
| Low-ESR capacitor compatibility | Stable with 1.0 µF ceramic output caps (no minimum ESR required) - eliminates need for bulkier tantalum or aluminum electrolytics. |
| Integrated thermal protection | Auto-shutdown at ~160 °C junction - prevents permanent damage during transient overloads or inadequate heatsinking. |
| Pb-free SC70-5 package | RoHS-compliant, halogen-free, 100% matte tin lead finish - meets industrial and consumer environmental compliance requirements. |
| High PSRR at 1 kHz | 60 dB typical - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
Applications
| Wearable Health Monitor | Bluetooth LE Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.8 V bias to analog front-end and BLE SoC I/O domain. Use Value: 40 µA IQ extends operational lifetime beyond 18 months; 230 mV dropout allows use until battery drops to 2.03 V. |
Use Scenario: Battery-operated temperature/humidity node transmitting data every 5 seconds via Bluetooth 5.0. IC Role / Device Role / Timing Role: Supplies regulated 1.8 V to MCU core and radio transceiver during active transmit bursts. Use Value: Stable output under 100 mA pulsed load ensures reliable radio modulation; SC70-5 footprint saves board area in compact modules. |
| Industrial Handheld Scanner | Smart Home Motion Detector |
Use Scenario: Ruggedized barcode scanner using single-cell Li-ion (2.8–4.2 V) with always-on wake-up logic. IC Role / Device Role / Timing Role: Powers ultra-low-power MCU sleep domain and IR proximity sensor at 1.8 V. Use Value: Enable pin allows firmware-controlled deep-sleep mode reducing system IQ to sub-µA levels between scans. |
Use Scenario: PIR-based occupancy sensor with motion-triggered LED indicator and Zigbee reporting. IC Role / Device Role / Timing Role: Delivers precise 1.8 V to PIR signal conditioner and sub-GHz transceiver IC. Use Value: ±2.0% output accuracy ensures consistent comparator thresholds; −40 °C to +85 °C rating supports outdoor enclosure deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/MB | 250 mV dropout at 100 mA; 1.6 µA IQ (lower), but only 250 mA max output; SOT-23-3 package (no enable). | Lacks enable control and higher output current headroom - suitable for simpler always-on systems without sequencing needs. | Choose when ultra-low IQ dominates over programmability and thermal margin. |
| TLC7701QDBVRQ1 | Automotive-grade (AEC-Q100); 200 mV dropout; 35 µA IQ; includes reset output - SC70-5 package with enable. | Qualified for automotive ambient range (−40 °C to +125 °C); adds power-good monitoring - overqualified for consumer portables. | Prefer when functional safety or extended temperature compliance is mandatory. |
Compared with MCP1700T-1802E/MB and TLC7701QDBVRQ1, the NCP612SQ18T1G offers balanced trade-offs: integrated enable, industry-standard 100 mA rating, proven stability with minimal ceramics, and cost-effective SC70-5 packaging - making it optimal for high-volume portable electronics where size, IQ, and ease of use are co-prioritized.
Availability
NCP612SQ18T1G is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and smart home motion detectors requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for NCP612SQ18T1G 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP612SQ18T1G belongs to onsemi's NCP612 series of ultra-low-IQ LDOs, engineered specifically for battery-powered portable equipment where extended runtime, small form factor, and robustness across temperature extremes are critical design objectives.
FAQ
What is the maximum input voltage rating for the NCP612SQ18T1G?
The NCP612SQ18T1G supports an absolute maximum input voltage of 6.0 V, as specified in the Maximum Ratings table. Operation above this level risks permanent damage. For reliable 1.8 V output, Vin must remain ≥2.03 V (1.8 V + 230 mV dropout) across all load and temperature conditions.
Does the NCP612SQ18T1G require a minimum load current to maintain regulation?
No, the NCP612SQ18T1G does not require a minimum load current. It remains stable and regulated from zero load up to 100 mA, as confirmed by its electrical characteristics and application notes - enabling use in intermittent-duty systems like wake-on-motion sensors.
Can the NCP612SQ18T1G be used with ceramic capacitors smaller than 1.0 µF?
The datasheet specifies 1.0 µF as the recommended minimum for both input and output capacitors. Using smaller values may degrade line/load transient response and ripple rejection; stability is guaranteed only with ≥1.0 µF ceramic capacitors per Figure 1 and Applications Information section.
Is the NCP612SQ18T1G pin-compatible with other variants in the NCP612 family?
Yes, all NCP612 variants (e.g., NCP612SQ30T1G, NCP612SQ33T1G) share identical SC70-5 pinout and package dimensions. Only the output voltage and marking code differ - enabling drop-in replacement during design iteration or voltage scaling.
What is the thermal resistance (RJA) of the NCP612SQ18T1G in standard PCB layout?
The datasheet specifies RJA = 300 °C/W for the SC70-5 package under standard JEDEC test conditions (single-layer 1 in² copper pad). Actual thermal performance improves significantly with enhanced PCB copper area, multiple vias to inner ground planes, and airflow - enabling >100 mA operation at room ambient.
NCP612SQ18T1G 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):
- 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)
NCP612SQ18T1G FAQ
1.How can I place an order for NCP612SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP612SQ18T1G 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 NCP612SQ18T1G reliable?
The price and inventory of NCP612SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP612SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP612SQ18T1G?
NCP612SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP612SQ18T1G 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 NCP612SQ18T1G?
For technical support, including NCP612SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ18T1G requirements.
6.How does Aetrix verify that NCP612SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP612SQ18T1G 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 NCP612SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP612SQ18T1G?
All NCP612SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ18T1G, 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 NCP612SQ18T1G part is unused and in its original packaging.
Return procedure for NCP612SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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