MCP1811AT-030/LT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
MCP1811AT-030/LT is an ultra-low quiescent current fixed 3.0 V LDO voltage regulator from Microchip accepting 3.6 V to 5.5 V input with a 0.4 V typical dropout voltage in a 5-pin SC70 package. It targets IoT and wearable battery-powered designs requiring maximum standby battery life. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- MCP1811AT-030/LT Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1811AT-030/LT?
- Ultra-low quiescent current in the sub-microamp range for extended battery life in always-on IoT and wearable applications
- Fixed 3.0 V output with 0.4 V typical dropout voltage operating from 3.6 V to 5.5 V input rail, compatible with single-cell Li-ion and alkaline sources
- Tiny 5-pin SC70 package measuring under 2.0 mm x 2.1 mm minimizes PCB area in space-constrained portable and wearable designs
What is MCP1811AT-030/LT used for?
MCP1811AT-030/LT is optimized for IoT sensor nodes, wearable electronics, and wireless beacons powered by coin cells or Li-ion batteries where the standby current budget is under 1 µA. Its 3.0 V fixed output and low 0.4 V dropout allow the regulator to operate from a nearly discharged 3.7 V Li-ion cell, maximizing usable energy extraction in compact devices like smart tags, medical patches, and environmental monitors.
What are the specifications of MCP1811AT-030/LT?
| Manufacturer Package Code | SC70-5 |
| Date Of Intro | 2018-09-27 |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.6V |
| Dropout Voltage1-Nom | 0.4V |
| Input Voltage Absolute-Max | 6V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 3.6V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Load Regulation-Max | 0.025% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 85°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.15A |
| Output Voltage1-Max | 3.12V |
| Output Voltage1-Min | 2.88V |
| Output Voltage1-Nom | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP5/6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 4% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Where can I find the MCP1811AT-030/LT datasheet?
MCP1811AT-030/LT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1811AT-030/LT?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low is the quiescent current of MCP1811AT-030/LT and how does this extend battery run time?
MCP1811AT-030/LT draws ultra-low quiescent current in the sub-microamp range (typically under 600 nA), meaning a 220 mAh CR2032 coin cell could supply the regulator's own bias for over 40 years. This enables always-on IoT devices to achieve multi-year battery life when the load sleeps and consumes only a few microamps.
What input voltage range is required for MCP1811AT-030/LT and which battery chemistries are compatible?
MCP1811AT-030/LT accepts 3.6 V to 5.5 V input, making it directly compatible with a single Li-ion cell (3.6–4.2 V), a 4-cell alkaline pack (~6 V via a series resistor), or a 5 V USB supply. The 0.4 V typical dropout means it keeps regulating at 3.0 V output down to a 3.4 V depleted Li-ion cell, extracting near-full battery capacity.
How does MCP1811AT-030/LT compare to a standard 3.3 V LDO for a Bluetooth beacon design?
MCP1811AT-030/LT provides 3.0 V at ultra-low quiescent current below 600 nA, versus typical LDOs drawing 50–200 µA quiescent. For a Bluetooth beacon spending 99% of its time in deep sleep drawing 2 µA, replacing a 100 µA quiescent LDO with MCP1811AT saves roughly 98 µA continuously, extending a 100 mAh battery from ~5 months to over 5 years.
What is the footprint of MCP1811AT-030/LT and how does it fit into a compact wearable PCB?
MCP1811AT-030/LT uses a 5-pin SC70 package measuring approximately 1.25 mm x 2.0 mm with 0.65 mm pitch, occupying under 3 mm² of board area. This is small enough to fit alongside a BLE SoC and coin-cell holder on a single 10 mm x 15 mm flex PCB layer, which is a common form factor for medical patches and smart tags.
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