充电管理IC LTC4054

features
programmable charge current up to 800ma
no mosfet, sense resistor or blocking diode
required
complete linear charger in thinsot
package for
single cell lithium-ion batteries
constant-current/constant-voltage operation
with thermal regulation to maximize charge
rate without risk of overheating
charges single cell li-ion batteries directly
from usb port
preset 4.2v charge voltage with ± 1% accuracy
charge current monitor output for gas
gauging
automatic recharge
soft-start limits inrush current
available in 5-lead sot-23 package
2.9v trickle charge threshold
c/10 charge termination
25ma supply current in shutdown
2.9v trickle charge threshold
applications
portable media players/mp3 players
cellular and smart mobile phone
charging docks and cradles
bluetooth applications