DESCRIPTION
The  LTC4012  is  a  constant-current/constant-volt age  battery  charger  controller.  It  uses  a  synchronous
quasi-constant  frequency  PWM  control  architecture that  will  not  generate  audible  noise  with  ceramic  bulk capacitors.  Charge  current  is  set  by  external  resistors  and  can  be  monitored  as  an  output  voltage. With no built-in termination, the LTC4012 family charges a wide range of batteries under external control.

FEATURES
  Geeral Purpose Battery Charger Cotroller
  Efficiet 550kHz Sychroous Buck PWM Topology
  ±0.5% Output Float Voltage Accuracy
  Programmable Charge Curret: 4% Accuracy
  Programmable AC Adapter Curret Limit: 3% Accuracy
  o Audible oise with Ceramic Capacitors
  IFET Low Loss Ideal Diode PowerPath™ Cotrol
  Wide Iput Voltage Rage: 6V to 28V
  Wide Output Voltage Rage: 2V to 28V
  Idicator Outputs for AC Adapter Preset, Chargig, C/10 Curret Detectio ad Iput Curret Limitig
  Aalog Charge Curret Moitor
  Micropower Shutdow
  20-Pi 4mm ×4mm ×0.75mm QF Package

APPLICATIOS
  otebook Computers
  Portable Istrumets
  Battery Backup Systems