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
