The PM6681A is a dual step-down controller with adjustable output voltages that can be used in notebook power systems.
This document is an application note for the PM6681A, a dual step-down controller designed for notebook system power. It features adjustable output voltages, internal linear regulators, and lossless current sensing. The note details the device's main features, typical applications, and provides a complete demonstration board schematic and component list.
| Input voltage range | 5.5 V to 36 V |
|---|---|
| Output 1 voltage | 1.5 V (typ.) |
| Output 2 voltage | 1.05 V (typ.) |
| Switching frequency | 200 kHz / 300 kHz |
| Output current | More than 5 A |
| LDO output voltage | 3.3 V (default) |
| LDO peak current | 100 mA |
| Reference voltage | 1.237 V |
| Quiescent power | 4 mW maximum |
The typical operating switching frequency is 200 kHz for one section and 300 kHz for the other.
The demonstration board provides 1.5 V for OUT1 and 1.05 V for OUT2.
The device supports an input voltage range from 5.5 V to 36 V.