MCP73834-FCI/UN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP73834-FCI/UN is a linear Li-Ion battery charge controller regulating to 4.2 V at up to 1 A charge current in a compact MSOP-10 package with thermal regulation. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- MCP73834-FCI/UN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8300(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP73834-FCI/UN?
- Linear Li-Ion charger with 4.2 V preset termination voltage and up to 1 A programmable charge current via single resistor
- Integrated thermal regulation automatically reduces charge current to prevent overheating in thermally limited enclosures
- Tiny MSOP-10 package measuring 3 mm x 3 mm enables ultra-compact single-cell battery charger designs
What is MCP73834-FCI/UN used for?
The MCP73834-FCI/UN is designed for portable consumer electronics such as Bluetooth earbuds, wearable health monitors, and handheld instruments that charge a single-cell Li-Ion or Li-Polymer battery from a USB 5 V source. Its linear topology eliminates inductor noise, making it ideal for RF-sensitive designs. The automatic thermal derating feature protects the device and battery in tight plastic enclosures without external thermistors.
What are the specifications of MCP73834-FCI/UN?
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-10 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| Qualification Status | Not Qualified |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP73834-FCI/UN datasheet?
MCP73834-FCI/UN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP73834-FCI/UN?
Compatible alternatives and drop-in replacements for MCP73834-FCI/UN:
Microchip Technology Inc 1A ADVANCED SINGLE CELL, FULLY INTEGRATED LI-ION/POLYMER CHARGE MANAGEMENT CONTR
1A ADVANCED SINGLE CELL, FULLY INTEGRATED LI-ION POLYMER CHANGE MANAGEMENT CONTR
1A SINGLE CELL CHARGER WITH USB PORT & AC ADAPTER SUPPLY MANAGEMENT
1A ADVANCED SINGLE CELL, FULLY INTEGRATED LI-ION POLYMER CHANGE MANAGEMENT CONTR
Frequently Asked Questions
How is the charge current programmed in the MCP73834-FCI/UN and what resistor value corresponds to 500 mA?
Charge current is set by a single external resistor connected between the PROG pin and ground. For 500 mA charge current, a 2 kΩ resistor is required, while a 1 kΩ resistor programs the maximum 1 A rate, per the MCP73834 datasheet formula IPROG = VPROG / RPROG.
What termination voltage does the MCP73834-FCI/UN regulate to and how does that suit standard Li-Ion cell chemistry?
The MCP73834-FCI/UN regulates to a fixed 4.2 V charge termination voltage, which matches the standard full-charge specification for lithium cobalt oxide and lithium manganese oxide single-cell batteries, ensuring maximum capacity utilization without overcharging and preserving cycle life beyond 300 to 500 cycles.
In a USB-powered wearable design, how does the MCP73834-FCI/UN's thermal regulation protect the battery during fast charging?
When junction temperature approaches the thermal regulation threshold of approximately 110°C, the MCP73834-FCI/UN automatically reduces the charge current proportionally, preventing thermal runaway in tight enclosures. This means the device can safely charge at 1 A programmed rate in free air and automatically derate to 300 mA or less inside a sealed plastic housing at 40°C ambient.
What is the factory lead time for the MCP73834-FCI/UN and does its Not Qualified status affect design-in risk?
Factory lead time is 6 weeks. The Not Qualified status indicates the part has not completed formal AEC-Q100 or similar automotive-grade qualification testing, making it appropriate for consumer and industrial designs but not for automotive or safety-critical applications that mandate Grade 1 or Grade 0 qualification levels.
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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 |
|---|---|---|
| 1+ | $1.1400 | $1.14 |
| 5+ | $1.1000 | $5.50 |
| 25+ | $1.0100 | $25.25 |
| 100+ | $0.8800 | $88.00 |
| 1000+ | $0.8600 | $860.00 |
| 5000+ | $0.8300 | $4150.00 |
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