MCP73831-2ATI/MC Microchip Integrated Circuit (Small Outline No-lead) In Stock
MCP73831-2ATI/MC is a single-cell Li-Ion/Li-Poly linear battery charger with 4.2 V regulation, up to 500 mA charge current, and thermal shutdown at 150°C. Available in DFN-8 package with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP73831-2ATI/MC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1612(MOQ 1)
- 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 MCP73831-2ATI/MC?
- 4.2 V regulated output voltage precisely matched for single-cell Li-Ion and Li-Poly battery charging
- Programmable charge current up to 500 mA via external resistor for flexible battery pack sizing
- Integrated thermal shutdown at 150°C protecting the IC and battery from overtemperature conditions
- Tiny DFN-8 package occupying minimal PCB area for space-constrained portable device designs
- Linear charger topology requiring no inductor, simplifying BOM and reducing EMI in compact gadgets
What is MCP73831-2ATI/MC used for?
MCP73831-2ATI/MC is ideal for portable consumer electronics such as Bluetooth headsets, fitness trackers, and handheld medical devices that use a single-cell Li-Ion or Li-Poly battery requiring a regulated 4.2 V charge termination. Its programmable charge current and integrated safety features including thermal shutdown simplify charger circuit design in wearables and IoT sensor nodes where PCB space is at a premium. Engineers also use it in USB-powered charging docks and battery backup modules where a simple, low-EMI linear charger topology is preferred over switching alternatives.
What are the specifications of MCP73831-2ATI/MC?
| Pbfree Code | Yes |
| Manufacturer Package Code | DFN-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 9 |
| Additional Feature | Thermal Shutdown:150C |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | R-PDSO-N8 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.11,20 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 1.5mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 3.75V |
| Supply Voltage-Nom (Vsup) | 5.2V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.20V |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP73831-2ATI/MC datasheet?
MCP73831-2ATI/MC Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP73831-2ATI/MC?
Compatible alternatives and drop-in replacements for MCP73831-2ATI/MC:
suggested
suggested
suggested
suggested
Frequently Asked Questions
How is the charge current of MCP73831-2ATI/MC set, and what is the maximum supported value?
The charge current of MCP73831-2ATI/MC is programmed by connecting a single resistor between the PROG pin and GND. The maximum charge current is 500 mA, set with a resistor of approximately 2 kΩ. Lower values can be selected for smaller battery packs, allowing designers to match charge rate to battery capacity without firmware changes or additional ICs.
At what temperature does MCP73831-2ATI/MC activate thermal shutdown, and how does this protect the battery?
MCP73831-2ATI/MC activates its internal thermal shutdown at a junction temperature of 150°C. When this threshold is reached, the charger reduces or stops current flow, preventing thermal runaway in the Li-Ion cell and protecting the IC itself. Once the junction temperature drops back below the threshold, charging resumes automatically, ensuring reliable operation in compact enclosures with limited airflow.
For a 400 mAh Li-Poly wearable battery, what charge current setting and approximate charge time does MCP73831-2ATI/MC support?
For a 400 mAh Li-Poly cell, a typical C/2 charge rate of 200 mA is set by using a 10 kΩ resistor on the PROG pin of MCP73831-2ATI/MC. At 200 mA constant current, the battery reaches approximately 80% capacity in about 90 minutes, with the remaining capacity filled during the constant-voltage 4.2 V phase, giving a total charge time near 2.5 hours.
How does the DFN-8 package of MCP73831-2ATI/MC compare to SOT-23-5 alternatives for space-constrained designs?
The DFN-8 package of MCP73831-2ATI/MC offers an exposed thermal pad that improves heat dissipation during high-current 500 mA charging, reducing junction temperature rise by several degrees compared to SOT-23-5 packages lacking a thermal pad. At roughly 2x3 mm footprint, the DFN-8 also provides a smaller PCB area than typical SOT-23-5 outlines, making it preferable for ultra-thin wearable and hearing aid PCB designs.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.1612 | $0.16 |
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