MCP73812 Datasheet | Microchip Technology

MCP73811/2 Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers Features - plete Linear Charge Management Controller - Integrated Pass Transistor - Integrated Current Sense - Integrated Reverse Discharge Protection - Constant Current / Constant Voltage Operation with Thermal Regulation - High Accuracy Preset Voltage Regulation: + 1% - Voltage Regulation: 4.20V - Selectable Charge Current: - MCP73811: 85 m A / 450 m A - Programmable Charge Current: - MCP73812: 50 m A - 500 m A - Minimum External ponents Required: - MCP73811: 2 Ceramic Capacitors - MCP73812: 2 Ceramic Capacitors and 1 Resistor - No Preconditioning - No End-of-Charge Control - No Undervoltage Lockout (UVLO) - Automatic Power-Down when Input Power Removed - Active High Charge Enable - Temperature Range: - -40°C to +85°C - Packaging: - 5-Lead SOT-23 Description The MCP73811/2 devices are linear charge management controllers that are designed for use in space limited and cost sensitive applications. The MCP73811/2 provide specific charge algorithms for single cell Li-Ion or Li-Polymer battery to achieve optimal capacity in the shortest charging time possible. Along with its small physical size, the low number of external ponents required make the MCP73811/2 ideally suited for portable applications. For applications charging from a USB port, the MCP73811 adheres to all the specifications governing the USB power bus. The MCP73811/2 employ a constant current/constant voltage charge algorithm. The constant voltage regulation is fixed at 4.20V, with a tight regulation tolerance of 1%. For the MCP73811, the constant current value is selected as 85 m A (low power USB port) or 450 m A (high power USB port) with a digital input signal on the PROG input. For the MCP73812, the constant current value is set with one external resistor. The MCP73811/2 limit the charge current based on die temperature during high power or high ambient conditions. This thermal regulation...