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