MCP73831-2ACI/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP73831-2ACI/OT is a single-cell Li-Ion and Li-Polymer linear battery charger IC with adjustable charge current up to 500 mA in a miniature SOT-23-5 package. It provides a 4.2 V regulated charge voltage with thermal regulation to prevent overheating during fast charge cycles. Available from authorized distributors in tape-and-reel packaging with RoHS-compliant lead-free finish and worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP73831-2ACI/OT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP73831-2ACI/OT?
- Single-cell Li-Ion/Li-Polymer linear charger with adjustable charge current up to 500 mA via a single external resistor
- Integrated thermal regulation automatically reduces charge current when die temperature exceeds 100°C, preventing overheating in compact enclosures
- SOT-23-5 package measures only 2.9 mm x 1.6 mm, enabling the smallest possible charger footprint for wearable and IoT battery-powered designs
What is MCP73831-2ACI/OT used for?
The MCP73831-2ACI/OT is ideal for wearable devices, wireless earbuds, and IoT sensor nodes powered by single-cell Li-Polymer batteries requiring USB-sourced 5 V input charging at currents from 15 mA to 500 mA. Its tiny SOT-23-5 footprint and simple single-resistor charge current programming make it a standard choice for compact consumer electronics designs, fitness trackers, and coin-sized Bluetooth beacons where board space is limited to less than 10 mm².
What are the specifications of MCP73831-2ACI/OT?
| Pbfree Code | Yes |
| YTEOL | 8 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 1.5mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 3.75V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| ## MCP73831-2ACI/OT Alternates Showing results | Image |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Where can I find the MCP73831-2ACI/OT datasheet?
MCP73831-2ACI/OT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP73831-2ACI/OT?
Compatible alternatives and drop-in replacements for MCP73831-2ACI/OT:
Frequently Asked Questions
How is the charge current of MCP73831-2ACI/OT set and what is the maximum supported current?
MCP73831-2ACI/OT sets charge current with a single external programming resistor connected to the PROG pin; a 2 kΩ resistor programs the maximum 500 mA charge current, while higher resistor values scale the current down proportionally to as low as 15 mA for small battery cells.
For a wearable fitness tracker with a 150 mAh Li-Polymer cell, what charge time can MCP73831-2ACI/OT achieve?
Programming MCP73831-2ACI/OT to 150 mA charge current (1C rate for a 150 mAh cell) charges the battery from 0% to approximately 80% in about 50 minutes and reaches full charge in roughly 90 minutes, including the constant-voltage tapering phase at 4.2 V.
How does MCP73831-2ACI/OT's thermal regulation protect the IC in sealed wearable enclosures?
When die temperature exceeds 100°C, MCP73831-2ACI/OT's built-in thermal regulation loop automatically reduces charge current to keep junction temperature below the 150°C maximum, preventing thermal damage in airtight enclosures where natural convection cooling is limited to less than 1 W/°C.
Is MCP73831-2ACI/OT compliant with RoHS and what package options are available for automated assembly?
Yes, MCP73831-2ACI/OT carries a JESD-609 code of e3 confirming full RoHS lead-free compliance (Pbfree Code: Yes), and the /OT suffix specifies tape-and-reel packaging on a 178 mm reel compatible with standard 8 mm carrier tape for automated SMT assembly of the 2.9 mm x 1.6 mm SOT-23-5 body.
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