MAX8967

The MAX8967 is an µPMIC with two DC-to-DC step-down switching converters and six remote capacitor-capable LDOs. The step-down converters deliver up to 2A of output current independently. Two of the LDOs deliver a load current up to 300mA, while the remaining four deliver up to 150mA. Both step-down converters have remote sense, allowing loads to be placed away from the IC. The IC operates over a 2.6V to 5.5V input supply range.

Fixed-frequency 4.4MHz PWM operation and clocks that are 180° out of phase permit the use of small external components. Under light load conditions, the step-down converters automatically switch to skip mode operation. In skip mode operation, switching occurs only as needed, allowing efficient operation. Placing either of the step-down converters into green mode reduces the quiescent current consumption of that converter to 5µA (typ).

The IC supports dynamic adjustment of the output voltage through its I²C interface. Each step-down converter has two register settings for output voltage and a setting for ramp rate. Also, each step-down converter has a dedicated enable pin and a dedicated V_ID pin to toggle between the two programmed output voltages. Additionally, an interrupt output is provided, allowing the IC to signal its master.

Applications

• Cellular Handsets and Smartphones
• Portable Devices
• Tablets