MCP73831-4ADI/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
The Microchip MCP73831-4ADI/OT is a single-cell lithium-ion and lithium-polymer battery charger IC in a miniature SOT-23-5 package. It delivers a programmable charge current up to 500 mA with an adjustable termination threshold and a 4.2 V regulation voltage. RoHS-compliant and available in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP73831-4ADI/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 MCP73831-4ADI/OT?
- Single-cell Li-Ion/Li-Po charge management with up to 500 mA programmable charge current
- Adjustable charge termination threshold for flexible end-of-charge detection suited to various battery chemistries
- Miniature SOT-23-5 (5-lead TSOP) package for ultra-compact charger circuit designs
- Linear charging topology eliminates switching noise for noise-sensitive audio and medical portable devices
- RoHS-compliant, JESD-609 e3 rated for lead-free reflow soldering processes
What is MCP73831-4ADI/OT used for?
The MCP73831-4ADI/OT is designed for portable consumer electronics such as Bluetooth earbuds, fitness trackers, and handheld medical devices that require a compact, low-noise single-cell lithium battery charger without external inductors. Its adjustable termination threshold makes it suitable for custom battery pack designs in IoT sensor nodes, GPS trackers, and remote controls where the charge cutoff must be tuned to specific cell capacity and cycle-life requirements. The tiny SOT-23-5 footprint also enables direct integration into USB-powered charging accessories, battery-backed RTC modules, and wearable health monitoring patches with minimal PCB area overhead.
What are the specifications of MCP73831-4ADI/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 |
| ## MCP73831-4ADI/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 MCP73831-4ADI/OT datasheet?
MCP73831-4ADI/OT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP73831-4ADI/OT?
Compatible alternatives and drop-in replacements for MCP73831-4ADI/OT:
Microchip Technology Inc SINGLE CELL, LI-LON/LI-POLYMER CHG MGMT SYSTEM
suggested
suggested
Frequently Asked Questions
What is the maximum charge current and regulation voltage of MCP73831-4ADI/OT?
MCP73831-4ADI/OT supports a programmable charge current up to 500 mA set by a single external resistor on the PROG pin, and regulates the battery terminal to 4.2 V for standard lithium-ion cells, making it a drop-in solution for single-cell portable device charging without external inductors or controllers.
How does the adjustable termination threshold in MCP73831-4ADI/OT benefit custom battery pack designs?
The adjustable termination threshold allows the designer to set the end-of-charge cutoff current between approximately 7.5% and 25% of the programmed charge current by selecting the appropriate PROG resistor value, enabling optimization of charge termination for batteries with different capacities ranging from 50 mAh to 1,000 mAh without changing the IC.
Why is the MCP73831-4ADI/OT linear charger architecture preferred over switching chargers in audio wearables?
The linear topology of MCP73831-4ADI/OT generates no switching noise because it uses a PMOS pass transistor rather than a switching regulator, preventing charge current harmonics from coupling into sensitive audio signal paths. This is critical in Bluetooth earbuds and hearing aids where switching frequency noise at 100 kHz to 1 MHz would degrade signal-to-noise ratios below acceptable thresholds.
What package does MCP73831-4ADI/OT use and how small is the resulting PCB footprint?
MCP73831-4ADI/OT is housed in a 5-lead SOT-23 package measuring approximately 2.9 mm x 1.6 mm, one of the smallest surface-mount packages available for a fully integrated charger IC. Combined with only 2 to 3 passive components, the total charger circuit area is typically under 20 mm², enabling integration into ultra-thin wearable PCBs and space-constrained IoT modules.
How can MCP73831-4ADI/OT be used in a USB-powered charging application without a dedicated power management IC?
MCP73831-4ADI/OT can be connected directly to a 5 V USB supply through a current-limiting resistor or fuse, with the PROG resistor set to limit charge current to 500 mA or less to comply with USB 2.0 bus power specifications. The integrated pre-conditioning mode automatically delivers a reduced 10% charge current to deeply discharged cells below 2.5 V before entering the constant-current phase, protecting both the battery and the USB host port.
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