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