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Microchip Technology MCP1701T-1802I/MB
- Part No.:
- MCP1701T-1802I/MB
- Manufacturer:
- Microchip Technology
- Package:
- TO-243AA
- Datasheet:
-
MCP1701T-1802I/MB.pdf
- Description:
- IC REG LINEAR 1.8V 110MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
MCP1701T-1802I/MB from Microchip Technology is a 1.8V fixed-output, 250 mA CMOS low-dropout (LDO) linear voltage regulator in 3-pin SOT-89 package, featuring 2.0 µA typical quiescent current, ±2% output voltage accuracy, and 400 mV typical dropout at 120 mA - optimized for lithium-ion, alkaline, and solar-powered battery applications requiring ultra-low power consumption.
For engineers reviewing the MCP1701T-1802I/MB datasheet, MCP1701T-1802I/MB pinout, MCP1701T-1802I/MB application, or MCP1701T-1802I/MB equivalent, key selection criteria include dropout performance at light-to-moderate loads, thermal capability in SOT-89, stability with 1 µF tantalum output capacitance, and compatibility with microcontroller core supply rails in space-constrained portable systems.
Technical Context
The MCP1701T-1802I/MB employs a P-channel MOSFET pass element enabling low dropout operation without load-dependent quiescent current increase. Its internal voltage reference and error amplifier deliver ±100 ppm/°C temperature drift and 0.2%/V line regulation, supporting stable 1.8V output across -40°C to +85°C ambient.
Designed for single-supply battery systems, it operates with input voltages up to 10.0V and maintains regulation down to VIN – VOUT = 300 mV (typ.) at 20 mA, while short-circuit protection ensures reliability under fault conditions without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±2% (max) - tight tolerance enables direct powering of 1.8V logic cores without post-regulation trimming |
| Max Output Current | 125 mA @ 1.8V - validated continuous delivery with ≤300 mV dropout at 20 mA, scalable to 110 mA per datasheet limits |
| Quiescent Current | 2.0 µA (typ.) - enables >1-year battery life in always-on smoke/CO₂ detectors using two AA cells |
| Dropout Voltage | 180 mV (typ.) @ 20 mA - sustains regulation with minimal headroom, critical for single-cell Li-ion (3.0–3.6V) input |
| Line Regulation | 0.2%/V (typ.) - maintains <±3.6 mV output shift over full 2.8–10.0V input range, reducing need for input filtering |
| Temp Coefficient | ±100 ppm/°C (typ.) - contributes <±18 mV total drift over -40°C to +85°C, suitable for industrial sensor nodes |
| Stability | Stable with ≥1 µF tantalum or aluminum-electrolytic output capacitor - eliminates need for ceramic ESR tuning |
Pinout & Package
Package: 3-pin SOT-89 (JEDEC TO-243), 4.60 mm × 2.29 mm × 1.60 mm body, tab-connected to GND for thermal dissipation (θJA ≈ 52°C/W on 1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | GND | Ground reference and thermal path - must be soldered to PCB copper pour for thermal management |
| 2 | VIN | Unregulated input - connects to battery or DC source; requires local 1 µF input capacitor within 5 mm |
| 3 | VOUT | Regulated 1.8V output - feeds load and 1 µF output capacitor; trace length minimized to reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.0 µA typical - extends shelf life and runtime in battery-backed real-time clocks and wireless sensors |
| Low dropout at light load | 180 mV @ 20 mA - enables use with partially discharged 2-cell alkaline (2.4V min) while maintaining 1.8V output |
| Fixed 1.8V output | No external resistors required - reduces BOM count and layout area for FPGA I/O or ARM Cortex-M core supplies |
| Short-circuit protection | Current-limiting foldback - prevents thermal runaway during output shorts without latch-up or shutdown delay |
| Wide input range | Up to 10.0V input - supports 9V alkaline, 2S Li-ion (8.4V max), and solar harvesters without pre-regulation |
Applications
| Smart Smoke Detectors | Portable Medical Sensors |
|---|---|
Use Scenario: Battery-powered optical smoke chamber with MCU, analog front-end, and RF transceiver operating continuously for 10+ years. IC Role / Device Role / Timing Role: Primary 1.8V supply for ultra-low-power microcontroller and signal chain. Use Value: 2.0 µA quiescent current enables >12-year battery life on two AA cells; 1.8V output matches low-voltage MCU core requirements. |
Use Scenario: Wearable pulse oximeter with photodiode amplifier, ADC, and Bluetooth LE radio powered by coin cell. IC Role / Device Role / Timing Role: Stable 1.8V rail for precision analog measurement and digital subsystem. Use Value: ±2% output accuracy ensures consistent ADC reference scaling; 1 µF capacitor stability simplifies miniaturized layout. |
| Solar-Powered Environmental Loggers | Industrial Wireless Sensor Nodes |
Use Scenario: Remote temperature/humidity logger harvesting energy from small solar panel into supercapacitor buffer. IC Role / Device Role / Timing Role: Low-headroom regulator converting variable 2.5–6.0V harvested voltage to clean 1.8V system rail. Use Value: 180 mV dropout at 20 mA allows regulation even at 2.0V input, maximizing usable energy from low-light conditions. |
Use Scenario: DIN-rail mounted vibration monitor with MEMS accelerometer, MCU, and LoRaWAN transceiver in harsh factory environment. IC Role / Device Role / Timing Role: Primary 1.8V supply tolerant of wide temperature (-40°C to +85°C) and input ripple. Use Value: ±100 ppm/°C tempco and 0.2%/V line regulation maintain ADC accuracy across thermal cycling and supply fluctuations. |
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 | SOT-23A package (smaller footprint), 150 mA max output, identical 1.8V ±2% and 2 µA IQ | Limited thermal capacity (θJA = 335°C/W); unsuitable for >50 mA continuous in sealed enclosures | Select when board space is constrained and load current remains ≤50 mA with adequate airflow |
| Torex XC6206P182MR-G | 1.8V ±2%, 250 mA, 1 µA IQ, SOT-23-3 package; no short-circuit foldback (latch-off only) | Lower IQ but lacks robust short-circuit recovery; requires external reset for fault recovery | Choose for lowest possible standby power where fault resilience is managed at system level |
Compared with MCP1701T-1802I/MB, the MCP1700T-1802E/TT trades thermal performance for size, while the XC6206P182MR-G reduces IQ by 1 µA but removes active short-circuit current limiting - making the MCP1701T-1802I/MB optimal for thermally demanding, fault-prone battery systems.
Availability
MCP1701T-1802I/MB is available at Aetrix Electronics and suitable for smart safety devices, portable medical instrumentation, solar-harvested environmental loggers, and industrial wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1701T-1802I/MB 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, interface, and power management ICs, with ISO/TS-16949 certified manufacturing and global technical support infrastructure.
The MCP1701 family was designed specifically for ultra-low-power, battery-critical applications such as smoke detectors, CO₂ sensors, and portable instrumentation - prioritizing micropower operation, wide input range, and robustness in unregulated energy sources.
FAQ
What is the maximum continuous output current for MCP1701T-1802I/MB at 1.8V?
The MCP1701T-1802I/MB delivers up to 125 mA continuously at 1.8V output, as specified in the Electrical Characteristics table for VR = 1.8V. This rating assumes proper thermal management via the SOT-89 tab on ≥1 in² copper; derating is required above +70°C ambient.
Does MCP1701T-1802I/MB require an external capacitor for stability?
Yes, MCP1701T-1802I/MB requires a minimum 1 µF output capacitor - tantalum or aluminum-electrolytic types are explicitly qualified in the datasheet. Ceramic capacitors may be used but require ESR >0.1Ω and careful layout to avoid instability.
Can MCP1701T-1802I/MB operate from a single 3.7V Li-ion cell across its full discharge curve?
Yes, MCP1701T-1802I/MB supports input voltages from 2.0V to 10.0V. With a dropout of 180 mV (typ.) at 20 mA, it maintains 1.8V regulation down to VIN = 1.98V - well below the 2.8V cutoff of a depleted 3.7V Li-ion cell.
What is the thermal resistance (θJA) of MCP1701T-1802I/MB in its SOT-89 package?
The MCP1701T-1802I/MB has a typical junction-to-ambient thermal resistance (θJA) of 52°C/W when mounted on 1 square inch of 2-oz copper. This value assumes standard JEDEC test conditions; actual θJA will vary with PCB layout, airflow, and copper area.
Is MCP1701T-1802I/MB compatible with lead-free reflow processes?
Yes, MCP1701T-1802I/MB is Pb-free and RoHS-compliant, with a matte tin (Sn) finish. It is rated for standard lead-free reflow profiles per JEDEC J-STD-020, including peak temperatures up to 260°C for 30 seconds.
MCP1701T-1802I/MB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
MCP1701T-1802I/MB FAQ
1.How can I place an order for MCP1701T-1802I/MB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1701T-1802I/MB 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 MCP1701T-1802I/MB reliable?
The price and inventory of MCP1701T-1802I/MB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1701T-1802I/MB is usually 5 days.
3.What payment methods are accepted for MCP1701T-1802I/MB?
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MCP1701T-1802I/MB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1701T-1802I/MB 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 MCP1701T-1802I/MB?
For technical support, including MCP1701T-1802I/MB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1701T-1802I/MB requirements.
6.How does Aetrix verify that MCP1701T-1802I/MB is sourced from the original manufacturer or authorized distributors?
All MCP1701T-1802I/MB 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 MCP1701T-1802I/MB meets industry standards.
7.What is the process for return or replacement of MCP1701T-1802I/MB?
All MCP1701T-1802I/MB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1701T-1802I/MB, 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 MCP1701T-1802I/MB part is unused and in its original packaging.
Return procedure for MCP1701T-1802I/MB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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