4060

4060 is a complete single-cell lithium-ion battery charger featuring battery polarity reversal protection and 5V input power polarity reversal protection. Its SOT23-5 package and minimal external component count make the 4060 an ideal choice for portable applications. The internal PMOSFET architecture combined with anti-backflow circuitry eliminates the need for external sense resistors and isolation diodes. Thermal feedback automatically adjusts the charge current to limit die temperature during high-power operation or elevated ambient temperature conditions. The full charge voltage is fixed at 4.2V, and the charge current is set externally via a single resistor. Once the battery reaches 4.2V and the charge current drops to 1/10 of the programmed value, the 4060 automatically terminates charging. When the input voltage (AC adapter or USB power) is removed, the 4060 automatically enters a low-current state with battery leakage current below 0.1uA. Additional features of the 4060 include input power adaptation, charge current monitor, undervoltage lockout, automatic recharge, and a status pin for charge indication.

Applications

• Charging docks
• Cellular phones, PDAs
• Bluetooth applications

Key features

• Li-ion battery reverse polarity protection (positive/negative)
• Vcc input reverse polarity protection
• Power adaptive
• Programmable charge current: 5mA - 600mA
• Constant current/constant voltage operation with thermal feedback for maximum charge rate
• Direct single-cell Li-ion battery charging from USB port
• 4.2V preset charge voltage with ±1% accuracy
• Automatic recharge
• 1 open-drain charge status output pin
• C/10 charge termination
• Standby supply current: 25uA
• 2.9V trickle charge
• Soft-start inrush current limiting
• 5-pin SOT-23 package