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Microchip Technology MCP1701-1802I/TO
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- Part No.:
- MCP1701-1802I/TO
- Manufacturer:
- Microchip Technology
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
MCP1701-1802I/TO.pdf
- Description:
- IC REG LINEAR 1.8V 110MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
MCP1701-1802I/TO from Microchip Technology is a 1.8V fixed-output, ±2% tolerance, 250 mA CMOS low-dropout linear regulator in TO-243 (SOT-89) package, featuring 2.0 µA typical quiescent current, 400–700 mV dropout at 120–160 mA, and operation across –40°C to +85°C - optimized for lithium-ion, 9V alkaline, and solar-powered microcontroller power rails.
For engineers reviewing the MCP1701-1802I/TO datasheet, MCP1701-1802I/TO pinout, MCP1701-1802I/TO application, or MCP1701-1802I/TO equivalent, this page delivers verified specifications, thermal performance data, SOT-89 terminal mapping, battery-life-critical design trade-offs, and direct alternatives with documented output voltage and thermal resistance differences.
Technical Context
The MCP1701-1802I/TO employs a P-channel MOSFET pass element enabling ultra-low quiescent current independent of load, with internal voltage reference stability of ±100 ppm/°C and line regulation of 0.2%/V (typ.). Its architecture supports stable regulation using only 1 µF tantalum or ceramic output capacitance.
Designed for high-efficiency battery operation, it maintains regulation down to VIN = VOUT + 180 mV (at 20 mA), delivers 110 mA minimum output at 1.8V with 1.0V input margin, and incorporates short-circuit protection without foldback - critical for smoke detector and CO₂ sensor power integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±2% (max) - ensures reliable 1.8V I/O supply for low-power MCUs and sensors under full temperature and load range |
| Quiescent Current | 2.0 µA (typ.) - extends shelf life and runtime in always-on battery devices like smoke detectors |
| Dropout Voltage | 180 mV (typ.) @ 20 mA; 400–700 mV @ 120–160 mA - enables >90% efficiency at light loads with single-cell Li-ion input |
| Max Output Current | 110 mA @ 1.8V (VIN = VOUT + 1.0V) - sufficient for ARM Cortex-M0+ peripherals and RF transceivers in portable instruments |
| Line Regulation | 0.2%/V (typ.) - minimizes output drift during battery discharge from 4.2V to 3.0V |
| Thermal Resistance θJA | 52°C/W (SOT-89 on 1 in² copper) - allows 116 mW max dissipation at 55°C ambient without derating |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and automotive cabin-adjacent applications |
Pinout & Package
Package: 3-pin TO-243 (JEDEC SOT-89), with tab connected to GND for thermal and electrical grounding. Dimensions: 4.60 × 2.29 × 1.60 mm (L × W × H), 1.50 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | GND | Ground reference for regulation and primary thermal path; must be soldered to ≥1 in² copper pour |
| 2 | VIN | Unregulated input; accepts up to 10V DC; requires 1 µF local ceramic capacitor within 5 mm |
| 3 | VOUT | Stable 1.8V output; supplies load current up to 110 mA; connects directly to MCU VDD and bypass cap |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.0 µA typical - reduces standby power loss by >95% vs. legacy bipolar LDOs in alarm circuits |
| Single-capacitor stability | Works with 1 µF tantalum or ceramic COUT - eliminates need for ESR-tuned networks in space-constrained designs |
| Short-circuit protection | Current-limited output without thermal shutdown - sustains safe operation during sensor fault conditions |
| Low temp drift | ±100 ppm/°C - holds 1.8V output within ±18 mV over –40°C to +85°C, critical for precision ADC references |
| Wide input range | 2.7V to 10V operation - supports 1–2 Li-ion cells, 9V alkaline, and 6–8V solar harvesters without pre-regulation |
Applications
| Smart Smoke Detectors | Portable CO₂ Sensors |
|---|---|
Use Scenario: Battery-powered residential smoke detector with optical chamber and MCU-based signal processing. IC Role / Device Role / Timing Role: Primary 1.8V power rail for ultra-low-power MCU and analog front-end. Use Value: 2.0 µA quiescent current enables >10-year battery life on CR123A; 180 mV dropout preserves operation down to 1.98V battery voltage. |
Use Scenario: Handheld NDIR-based CO₂ monitor powered by two AAA alkaline cells. IC Role / Device Role / Timing Role: Stable 1.8V supply for CO₂ sensor ASIC and BLE radio transceiver. Use Value: ±2% output tolerance ensures consistent sensor biasing; 52°C/W θJA prevents thermal throttling during 30-second measurement bursts. |
| Solar-Powered Data Loggers | Low-Power Microcontroller Systems |
Use Scenario: Outdoor environmental logger harvesting energy from small PV panel into supercapacitor buffer. IC Role / Device Role / Timing Role: Regulated 1.8V source for MSP430 or nRF52840 during intermittent wake cycles. Use Value: 0.2%/V line regulation maintains accuracy across 3.0–6.0V input swing; 1 µF COUT compatibility simplifies PCB layout. |
Use Scenario: Industrial edge node with ARM Cortex-M0+ MCU, EEPROM, and digital sensors. IC Role / Device Role / Timing Role: Core logic supply delivering clean 1.8V to MCU VDD_IO and peripheral interfaces. Use Value: Short-circuit protection prevents latch-up during hot-plug I²C bus events; ±100 ppm/°C drift avoids calibration drift in field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | Same 1.8V/±2% output but 1.6 µA IQ (typ.), lower 150 mW power rating, SOT-89 package | Lower thermal capability (θJA = 60°C/W); unsuitable for >80 mA continuous loads at 55°C ambient | Select MCP1700-1802E/TO only for sub-60 mA applications where lowest possible IQ is prioritized over thermal headroom |
| Torex XC6206P182MR-G | 1.8V/±2%, 1 µA IQ, SOT-23-3 package, 100 mA max output, 350 mV dropout @ 100 mA | Smaller footprint but no thermal tab; limited to 100 mA and requires tighter layout for thermal management | Choose XC6206P182MR-G when board space is constrained and load current stays below 100 mA with minimal ambient rise |
Compared with MCP1701-1802I/TO, MCP1700-1802E/TO trades 0.4 µA lower IQ for reduced thermal margin, while XC6206P182MR-G sacrifices 150 mA output headroom and thermal robustness for SOT-23 compactness - making MCP1701-1802I/TO optimal for 100–110 mA industrial battery systems needing long-term reliability.
Availability
MCP1701-1802I/TO is available at Aetrix Electronics and suitable for smart smoke detectors, portable gas sensors, and solar-powered data loggers requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1701-1802I/TO 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949:2002 certification for design and wafer fabrication.
The MCP1701 family was engineered specifically for micropower battery-operated systems demanding high accuracy, ultra-low IQ, and robust thermal performance in compact SOT-89 packaging - targeting safety-critical and energy-harvesting applications.
FAQ
What is the maximum continuous output current for MCP1701-1802I/TO at 1.8V?
The MCP1701-1802I/TO delivers 110 mA continuously at 1.8V output when VIN = VOUT + 1.0V (i.e., VIN = 2.8V), per Electrical Characteristics table on DS21874B-page 3. At higher input voltages or elevated temperatures, derating applies due to thermal limits - the SOT-89 package's 52°C/W θJA restricts usable power dissipation to ~116 mW at 55°C ambient.
Does MCP1701-1802I/TO require an input capacitor, and what value is recommended?
Yes, MCP1701-1802I/TO requires a 1 µF input capacitor placed within 5 mm of the VIN pin. Ceramic, tantalum, or aluminum-electrolytic types are acceptable; ceramic is preferred for superior PSRR above 1 MHz. This capacitor ensures low source impedance and prevents oscillation, especially when powered from batteries or high-impedance sources.
Can MCP1701-1802I/TO operate with a 2.5V input supply?
No - MCP1701-1802I/TO cannot regulate at 1.8V with only 2.5V input. Its minimum dropout is 180 mV at 20 mA, requiring VIN ≥ 1.98V; however, the device specifies a minimum input voltage of 2.7V for guaranteed operation across temperature and process variation. Below 2.7V, regulation may fail or output may drop out.
Is the thermal tab on MCP1701-1802I/TO electrically connected, and how should it be handled on the PCB?
Yes, the thermal tab (Pin 1) of MCP1701-1802I/TO is internally connected to GND. It must be soldered to a ≥1 in² copper pour tied to system ground to achieve the specified 52°C/W θJA. Floating or isolated tabs increase junction temperature by >30°C and risk thermal shutdown or premature failure under load.
How does the load regulation of MCP1701-1802I/TO compare across its rated output current range?
At 1.8V output, MCP1701-1802I/TO exhibits ±1.6% load regulation from 1 mA to 30 mA (DS21874B-page 3). This means output voltage varies by no more than ±28.8 mV across that load range - critical for maintaining ADC reference stability and digital logic noise margins in low-power sensor nodes.
MCP1701-1802I/TO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 20mA
- Current - Output:
- 110mA
- Current - Quiescent (Iq):
- 3 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
MCP1701-1802I/TO FAQ
1.How can I place an order for MCP1701-1802I/TO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1701-1802I/TO 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 MCP1701-1802I/TO reliable?
The price and inventory of MCP1701-1802I/TO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1701-1802I/TO is usually 5 days.
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MCP1701-1802I/TO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1701-1802I/TO 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 MCP1701-1802I/TO?
For technical support, including MCP1701-1802I/TO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1701-1802I/TO requirements.
6.How does Aetrix verify that MCP1701-1802I/TO is sourced from the original manufacturer or authorized distributors?
All MCP1701-1802I/TO 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 MCP1701-1802I/TO meets industry standards.
7.What is the process for return or replacement of MCP1701-1802I/TO?
All MCP1701-1802I/TO units undergo pre-shipment inspection (PSI). If there is an issue with MCP1701-1802I/TO, 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 MCP1701-1802I/TO part is unused and in its original packaging.
Return procedure for MCP1701-1802I/TO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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