MCP73837-FJI/MF Microchip Integrated Circuit (Small Outline No-lead) In Stock
The MCP73837-FJI/MF is a single-cell Li-Ion and Li-Polymer linear battery charger IC from Microchip with adjustable charge current threshold. It provides complete constant-current/constant-voltage charge management in a compact 10-lead DFN package. Available from stock worldwide with competitive pricing.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- MCP73837-FJI/MF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9850(MOQ 100)
- 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 MCP73837-FJI/MF?
- Complete Li-Ion/Li-Polymer CC/CV charge algorithm integrated in a single IC, eliminating external charge management logic
- Adjustable charge current via a single external resistor enables optimization for cell capacities from small coin cells to multi-hundred mAh packs
- Compact 10-lead DFN package (approximately 3 mm x 3 mm) fits into space-constrained portable device PCBs
- Automatic charge termination and preconditioning for deeply discharged cells protects battery health in consumer applications
What is MCP73837-FJI/MF used for?
The MCP73837-FJI/MF is used in portable consumer electronics such as wireless earbuds, smartwatches, and handheld scanners that require autonomous single-cell Li-Ion or Li-Polymer charging from a USB or wall adapter source. Its adjustable charge current makes it suitable for devices with cell capacities ranging from 100 mAh to over 1000 mAh, allowing a single IC to serve multiple product variants. Industrial handheld instruments and medical wearable devices also use it to manage battery charging cycles with automatic termination, reducing the firmware burden on the host microcontroller.
What are the specifications of MCP73837-FJI/MF?
| Manufacturer Package Code | DFN-10 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | S-PDSO-N10 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC10,.12,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 3mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 4.5V |
| 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 | +4.2V |
| 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 | Malaysia, Thailand |
Where can I find the MCP73837-FJI/MF datasheet?
MCP73837-FJI/MF Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP73837-FJI/MF?
Compatible alternatives and drop-in replacements for MCP73837-FJI/MF:
Microchip Technology Inc Adjustable, 1 Channel, +4.2V, PDSO10
Frequently Asked Questions
How is the charge current programmed on the MCP73837-FJI/MF and what range of cell capacities does it support?
The MCP73837-FJI/MF sets its constant-current charge level via a single external programming resistor; typical charge currents range from under 100 mA for small 100 mAh cells up to several hundred milliamps for larger 1000 mAh packs, with the resistor value calculated from the published current-to-resistance formula in the datasheet, requiring no firmware to adjust.
Which battery chemistry types does the MCP73837-FJI/MF support, and does it handle deeply discharged cells?
The MCP73837-FJI/MF supports single-cell Li-Ion and Li-Polymer batteries using the standard 4.2 V constant-voltage regulation target; it also includes a preconditioning phase for deeply discharged cells below approximately 3 V, applying a trickle charge at a reduced rate before transitioning to the full constant-current phase to safely recover the cell.
For a USB-charged wireless earbud design, how does the DFN-10 package of the MCP73837-FJI/MF help minimize PCB area?
The MCP73837-FJI/MF in its 10-lead DFN package occupies approximately 3 mm x 3 mm of PCB footprint with an exposed thermal pad for heat dissipation, enabling the complete charger circuit — including only a few passive components — to fit within the tiny PCB of a wireless earbud or fitness tracker that may have less than 200 mm² of total board area.
When does the MCP73837-FJI/MF automatically terminate charging and what safety benefit does this provide?
The MCP73837-FJI/MF monitors the charge current during the constant-voltage phase and terminates charging when the current decays to a programmed fraction of the full charge current (typically 10% of the set constant-current value); this automatic cut-off prevents overcharging, which can cause capacity degradation or thermal runaway in Li-Ion cells rated at 4.2 V nominal voltage.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $1.1400 | $114.00 |
| 1000+ | $1.1100 | $1110.00 |
| 1080+ | $1.1000 | $1188.00 |
| 5040+ | $0.9970 | $5024.88 |
| 7560+ | $0.9880 | $7469.28 |
| 10080+ | $0.9850 | $9928.80 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit