特点
Manages Total Power Between a USB Peripheral and Battery Charger
Minimal Voltage Drop (100mV at 500mA)
Ultralow Battery Drain: 1μA
Reverse Current Blocking Diode not Required
Undervoltage Lockout
Very Few External Components
Compatible with Several LTC Linear Battery Chargers
Overtemperature Protected
Dual Battery Charge Priority Management
Low Profile (1mm) SOT-23 Package
典型应用
典型应用
描述
The LTC?4410 enables simultaneous battery charging and operation of portable USB 1.0 and 2.0 compliant devices while they are connected to a USB port. As the USB peripheral load increases, the LTC4410 proportionally reduces the battery charge current to keep the total current less than 500mA or 100mA, depending on the state of the MODE pin.
The LTC4410 includes a USB present output that drives an external P-channel MOSFET to disconnect the battery from the USB peripheral when the USB power is valid. This allows device operation when connected to the USB port, even when the battery is deeply discharged.
Other features include reverse current blocking, thermal shutdown and low quiescent current (80μA in 500mA MODE) that is compliant with USB Suspend Mode.
The LTC4410 is available in the low profile (1mm) SOT-23 (ThinSOT?) package.