General Description
The MAX17085B is an all-in-one notebook power solution integrating a multichemistry battery charger, dual fixed output Quick-PWMK step-down controllers, and dual keep-alive linear regulators:

Features
● All-in-One Charger Plus Dual Main Step-Down Controllers
● 5V/100mA and 3.3V/50mA LDO Regulators
● Main
    Dual Quick-PWM with Fast Transient Response
    and Extended On-Time
    300kHz to 800kHz Switching Frequency
    Fixed 5V and 3.3V SMPS Outputs
    Low-Noise Ultrasonic Mode
    Autoretry Fault Protection
● Charger
    High Switching Frequency (1.4MHz)
    Selectable 2-, 3-, and 4-Cell Battery Voltage
    Automatic Selection of System Power Source
    Internal Charge-Pump for Adapter n-Channel MOSFETs Drive
    Q0.4% Accurate Charge Voltage
    Q2.5% Accurate Input Current Limiting
    Q3% Accurate Charge Current
● Monitor Outputs for
    AC Adapter Current (Q2% Accuracy)
    Battery Discharge Current (Q2% Accuracy)
    AC Adapter OK
● Analog/PWM (100Hz to 500kHz) Adjustable Charge Current Setting
● AC Adapter Overvoltage and Overcurrent rotection