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LTC4081 - 500mA Li-Ion Charger

General Description

The LTC®4081 is a complete constant-current/constantvoltage linear battery charger for a single-cell 4.2V lithium-ion/polymer battery with an integrated 300mA synchronous buck converter.

Key Features

  • Battery Charger: nn Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate without Risk of Overheating nn Internal 4.5-Hour Safety Timer for Termination nn Charge Current Programmable Up to 500mA with 5% Accuracy nn NTC Thermistor Input for Temperature Qualified Charging nn C/10 Charge Current Detection Output nn 5µA Supply Current in Shutdown Mode Switching Regulator: nn High Efficiency Synchronous Buck Converter nn 300mA Output Current (Constant-Frequency Mod.

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Full PDF Text Transcription for LTC4081 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for LTC4081. For precise diagrams, tables, and layout, please refer to the original PDF.

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FEATURES Battery Charger: nn Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate without Risk of Overheating nn Internal 4.5-Hour Safety Timer for Termination nn Charge Current Programmable Up to 500mA with 5% Accuracy nn NTC Thermistor Input for Temperature Qualified Charging nn C/10 Charge Current Detection Output nn 5µA Supply Current in Shutdown Mode Switching Regulator: nn High Efficiency Synchronous Buck Converter nn 300mA Output Current (Constant-Frequency Mode) nn 2.7V to 4.5V Input Range (Powered from BAT Pin) nn 0.8V to VBAT Output Range nn MODE Pin Selects Fixed (2.25MHz) Constant-Frequency PWM Mode or Low ICC (23µA) Burst Mode® Operation nn 2µA BAT Current in Shutdown Mode nn 10-Lead, Low Profile (0.