MCP73838T-FCI/MF Microchip Integrated Circuit (Small Outline No-lead) In Stock
Microchip MCP73838T-FCI/MF is a linear Li-Ion/Li-Polymer battery charger IC supporting USB and DC input, up to 1 A charge current, and a 4.2 V regulated charge voltage. Features thermal regulation, programmable charge current via resistor, and LED charge-status outputs in a 10-pin DFN package. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- MCP73838T-FCI/MF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7938(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Up to 1 A programmable charge current set by a single external resistor, enabling flexible charging for Li-Ion cells from 100 mA to 1 A
- Dual USB/DC input support with automatic source selection for portable devices powered from either 5 V USB or wall adapters
- Integrated thermal regulation limiting junction temperature to 110°C to protect the IC and battery in compact enclosures
- Charge-status and fault indicator outputs for direct LED driving without additional logic components
Applications
The MCP73838T-FCI/MF is designed for single-cell Li-Ion and Li-Polymer battery charging in portable consumer devices, wearable electronics, and wireless IoT nodes powered from USB or 5 V DC sources. Its thermal regulation automatically reduces charge current when the die temperature reaches 110°C, making it safe for use in slim enclosures without heatsinking. The programmable charge current and status outputs simplify integration into smartwatches, Bluetooth earbuds, and handheld medical devices where charge-rate control and user feedback are required.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | DFN-10 |
| Factory Lead Time | 6Weeks |
| 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 |
| 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 | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.2V |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP73838T-FCI/MF:
Microchip Technology Inc Adjustable, 1 Channel, +4.2V, PDSO10
Frequently Asked Questions
How is the charge current of MCP73838T-FCI/MF programmed, and what resistor value sets 500 mA for USB charging?
The charge current is set by a single resistor connected between the PROG pin and ground; the relationship is approximately ICHARGE = 1000 V / RPROG. To set 500 mA, connect a 2 kΩ resistor on the PROG pin. For USB-standard 100 mA charging, a 10 kΩ resistor is used. This single-resistor approach eliminates the need for a microcontroller to set charge current during normal operation.
What thermal protection does MCP73838T-FCI/MF provide, and how does it behave in a slim wearable enclosure?
The MCP73838T-FCI/MF includes an integrated thermal regulation loop that reduces charge current whenever the junction temperature exceeds 110°C. In a slim wearable with poor thermal dissipation, the IC automatically backs off from 1 A toward 200 mA or less, maintaining safe operation without external thermal cutoffs. This prolongs both the charger IC life and the Li-Polymer battery life by preventing sustained over-temperature stress.
Can MCP73838T-FCI/MF charge a 3.7 V Li-Ion cell to its full 4.2 V termination voltage from a 5 V USB port?
Yes. With a 5 V USB input and a 4.2 V termination voltage, the dropout across the linear pass element is 0.8 V at full charge current. The MCP73838T-FCI/MF manages this dropout linearly, so at 1 A the power dissipation is 800 mW — within the thermal limits of the DFN-10 package on a moderate copper pour, though thermal regulation may reduce current if the die reaches 110°C in still air without copper spreading.
What does the 10-pin DFN package of MCP73838T-FCI/MF look like, and how are the charge-status LEDs connected?
The DFN-10 package measures 3 mm x 3 mm with a 0.5 mm pin pitch and an exposed thermal pad on the bottom. Two open-drain status output pins (STAT1 and STAT2) drive LEDs directly with a series current-limiting resistor of approximately 470 Ω for a 2 V forward-voltage LED on a 5 V rail, indicating charge-in-progress, charge-complete, or fault conditions without requiring an external logic gate or microcontroller.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.2072 | $3.21 |
| 100+ | $1.1400 | $114.00 |
| 400+ | $0.9020 | $360.80 |
| 999+ | $0.8820 | $881.12 |
| 1000+ | $0.7938 | $793.80 |
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