LTC4410 Datasheet | Linear Technology

LTC4410 USB Power Manager in Thin SOT .. Features - - - - - - - - - - DESCRIPTIO Manages Total Power Between a USB Peripheral and Battery Charger Minimal Voltage Drop (100m V at 500m A) Ultralow Battery Drain: 1µA Reverse Current Blocking Diode Not Required Undervoltage Lockout Very Few External ponents patible with Several LTC Linear Battery Chargers Overtemperature Protected Dual Battery Charge Priority Management Low Profile (1mm) SOT-23 Package The LTC®4410 enables simultaneous battery charging and operation of portable USB 1.0 and 2.0 pliant 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 500m A or 100m A, 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 500m A MODE) that is pliant with USB Suspend Mode. The LTC4410 is available in the low profile (1mm) SOT-23 (Thin SOTTM) package. , LTC and LT are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. U APPLICATIO S - - - - - Cellular Phones PDAs Digital Cameras MP3 Players Battery Backup Systems TYPICAL APPLICATIO 100m A 500m A 4.35V TO 5.5V FROM USB 4.7µF 1Ω USB Powered Battery Charger and Power Manager MODE VIN GND LTC4410 CHP USBP IRLML6401 3.4k 1% 1M BATTERY CHARGER CURRENT LOAD CURRENT 0m A 440m A VOUT 4.7µF SYSTEM POWER SUPPLY 200m A OFF ON SHDN VCC TIMER PROG BAT NTC GND 1-CELL Li-Ion 240m...