MCP73831-2ACI/OT

Part: MCP73831/2

Type: Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers

Description: The MCP73831/2 devices are highly advanced linear charge management controllers for single-cell Li-Ion/Li-Polymer batteries, offering programmable charge current from 15 mA to 500 mA, four fixed voltage regulation options (4.20V, 4.35V, 4.40V, 4.50V), and thermal regulation, available in 8-Lead DFN or 5-Lead SOT-23 packages.

Operating Conditions:

• Supply voltage: 3.75V to 6V
• Operating temperature: -40°C to +85°C
• Output voltage options: 4.20V, 4.35V, 4.40V, 4.50V
• Programmable charge current: 15 mA to 500 mA

Absolute Maximum Ratings:

• Max supply voltage: 7.0V
• Max continuous current: 550 mA (Fast Charge Current Regulation)
• Max junction/storage temperature: +150°C

Key Specs:

• Supply Voltage (V DD): 3.75V to 6V
• Regulated Output Voltage (V REG): 4.168V to 4.534V (across all options)
• Fast Charge Current Regulation (I REG): 12.5 mA to 550 mA (based on PROG resistor)
• Precondition Current Ratio (I PREG / I REG): 7.5% to 40% (selectable)
• Charge Termination Current Ratio (I TERM / I REG): 3.75% to 20% (selectable)
• Pass Transistor ON-Resistance (R DSON): 350 mΩ (Typ, V DD = 3.75V, T J = 105°C)
• Output Reverse Leakage Current (I DISCHARGE): 0.15 μA (Typ, PROG Floating)
• Supply Current (I SS, Charging): 510 μA (Typ)

Features:

• Linear Charge Management Controller
• Integrated Pass Transistor
• Integrated Current Sense
• Reverse Discharge Protection
• High-Accuracy Preset Voltage Regulation: + 0.75%
• Four Voltage Regulation Options: 4.20V, 4.35V, 4.40V, 4.50V
• Programmable Charge Current: 15 mA to 500 mA
• Selectable Preconditioning: 10%, 20%, 40%, or Disable
• Selectable End-of-Charge Control: 5%, 7.5%, 10%, or 20%
• Charge Status Output (Tri-State for MCP73831, Open-Drain for MCP73832)
• Automatic Power-Down
• Thermal Regulation

Applications:

• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers

Package:

• 8-Lead, 2 mm x 3 mm DFN
• 5-Lead, SOT-23

• Linear Charge Management Controller:
• -Integrated Pass Transistor
• -Integrated Current Sense
• -Reverse Discharge Protection
• High-Accuracy Preset Voltage Regulation: + 0.75%
• Four Voltage Regulation Options:
• -4.20V, 4.35V, 4.40V, 4.50V
• Programmable Charge Current: 15 mA to 500 mA
• Selectable Preconditioning:
• -10%, 20%, 40%, or Disable
• Selectable End-of-Charge Control:
• -5%, 7.5%, 10%, or 20%
• Charge Status Output
• -Tri-State Output - MCP73831
• -Open-Drain Output - MCP73832
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging:
• -8-Lead, 2 mm x 3 mm DFN
• -5-Lead, SOT-23

• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers

The descriptions of the pins are listed in Table 3-1.

Note 1: Not production tested. Ensured by design.

† Notice: Stresses above those listed under 'Maximum Ratings' may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

• All Inputs and Outputs w.r.t. V SS ............... -0.3 to (V DD +0.3)V
• Maximum Junction Temperature, T J ............Internally Limited
• Storage temperature .....................................-65°C to +150°C
• ESD protection on all pins:
• Human Body Model (1.5 k in Series with 100 pF) 4 kV
• Machine Model (200 pF, No Series Resistance).............400V

An internal electrical connection exists between the Exposed Thermal Pad (EP) and the V SS pin. They must be connected to the same potential on the Printed Circuit Board (PCB).

For better thermal performance, it is recommended to add vias from the land area of EP to a copper layer on the other side of the PCB.

NOTES: