Description
The MCP73837 and MCP73838 devices are fully integrated linear Li-Ion / Li-Polymer battery chargers with autonomous power source selection. Along with its small physical size, the low number of external components required makes the MCP73837/8 ideally suitable for portable applications.

FEATUREs
• High Accuracy Preset Voltage Regulation: +0.5%
• Available Voltage Regulation Options:
- 4.20V, 4.35V, 4.4V, or 4.5V
• Complete Linear Charge Management Controller:
- Autonomous Power Source Selection
- Integrated Pass Transistors
- Integrated Current Sense
- Integrated Reverse Discharge Protection
• Constant Current (CC) / Constant Voltage (CV) Operation with Thermal Regulation
• Selectable USB-Port Charge Current:
- Low: 1 Unit Load / High: 5 Unit Loads
• Programmable AC-Adapter Charge Current:
- 15mA - 1000mA
• Two Charge Status Outputs
• Power-Good Monitor: MCP73837
• Timer Enable: MCP73838
• Automatic Recharge:
- Selectable Voltage Threshold
• Automatic End-of-Charge Control:
- Selectable Charge Termination Current Ratio
- Selectable Safety Timer Period
• Preconditioning of Deeply Depleted Cells - can be disabled
• Battery Cell Temperature Monitor
• UVLO (Undervoltage Lockout)
• Automatic Power-Down when Input Power is Removed
• Low-Dropout (LDO) Linear Regulator Mode
• Numerous Selectable Options Available for a Variety of Applications:
- Refer to Section 1.0 “Electrical Characteristics”for Selectable Options”
- Refer to the “Product Identification System”for Standard Options
• Temperature Range: -40°C to 85°C
• Packaging:
- 10-Lead 3 mm x 3 mm DFN
- 10-Lead MSOP*
* Consult Factory for MSOP Package Availability.

APPLICATIONs
• Smart Phones and Personal Data Assistants(PDA)
• Portable Media Players(PMP)
• Ultra Mobile Devices(UMD)
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• Handheld Medical Devices
• AC/USB Dual Source Li-Ion Battery Chargers