MCP73837-FCI/UN Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP73837-FCI/UN is a linear Li-Ion battery charger with dual USB and DC input sources, 4.2 V charge regulation, and up to 1 A charge current in a 10-pin MSOP package. It includes a power-good output, adjustable threshold, and automatic input source selection for portable device charging.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- MCP73837-FCI/UN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3100(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 MCP73837-FCI/UN?
- Dual-input design automatically selects between USB (5 V, 500 mA limited) and DC adapter inputs for flexible charging in portable devices
- Up to 1 A programmable charge current with 4.2 V regulation voltage and power-good output for charging status indication
- Adjustable safety timer threshold and preconditioning enable compliance with Li-Ion charging profiles in consumer and medical portable designs
What is MCP73837-FCI/UN used for?
The MCP73837-FCI/UN is designed for single-cell Li-Ion and Li-Polymer battery charging in smartphones, tablets, portable medical devices, and handheld instruments that accept both USB and wall adapter power. Its automatic input source selection and 1 A maximum charge current enable fast charging while remaining USB-compliant at 500 mA when connected to a USB host. Wearables, portable data loggers, and GPS devices benefit from its compact MSOP-10 package and integrated power-good status output for battery management.
What are the specifications of MCP73837-FCI/UN?
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-10 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | S-PDSO-G10 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP10,.19,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| 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 | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.2V |
| ## MCP73837-FCI/UN Alternates Showing results | Image |
| Package | Small Outline Packages |
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 MCP73837-FCI/UN datasheet?
MCP73837-FCI/UN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP73837-FCI/UN?
Compatible alternatives and drop-in replacements for MCP73837-FCI/UN:
Microchip Technology Inc Adjustable, 1 Channel, +4.2V, PDSO10
suggested
suggested
suggested
suggested
suggested
1A SINGLE CELL CHARGER WITH USB PORT & AC ADAPTER SUPPLY MANAGEMENT
1A SINGLE CELL CHARGER WITH USB PORT & AC ADAPTER SUPPLY MANAGEMENT
1A ADVANCED SINGLE CELL, FULLY INTEGRATED LI-ION/POLYMER CHARGE MANAGEMENT CONTR
Frequently Asked Questions
How does the MCP73837-FCI/UN manage input priority when both USB and DC adapter sources are connected simultaneously?
The MCP73837-FCI/UN automatically selects the DC adapter input when both a 5 V USB source and a higher-voltage DC adapter are present, as the DC input typically provides higher voltage enabling higher charge current up to 1 A. When only USB is available, the device limits charge current to 500 mA to comply with USB 2.0 host current specifications. This automatic switchover requires no firmware control, simplifying portable charger design.
What charge current range is configurable for the MCP73837-FCI/UN and how is it set in a circuit design?
The MCP73837-FCI/UN supports programmable charge current from approximately 100 mA to 1 A, set by an external resistor connected to the PROG pin. A lower resistance value sets higher charge current; for example, a 2 kΩ resistor sets approximately 500 mA and a 1 kΩ resistor sets approximately 1 A. This single-resistor programming approach allows the same IC to serve battery capacities from 200 mAh to 3000 mAh with a simple BOM change.
For a wearable device design using a 400 mAh Li-Ion cell, what does the MCP73837-FCI/UN power-good output enable in the system architecture?
The power-good output asserts a logic signal when a valid input supply is detected, allowing the host MCU to detect whether USB or DC power is available before enabling high-current loads or initiating data transfer. For a 400 mAh cell charged at 200 mA, the 2-hour charge cycle can be tracked by monitoring the STAT pin, which transitions from charge-in-progress to charge-complete when the 4.2 V termination voltage is reached and current drops below the C/10 termination threshold of approximately 40 mA.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.3100 | $0.31 |
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