This is a demonstration board for the PM6680A dual synchronous step-down controller with adjustable output voltages and LDO function from STMicroelectronics company. The board has the following features: constant on-time control allows very fast load transients; 6 V to 36 V input voltage range; 5 V auxiliary output voltage; adjustable switching outputs; lossless current sensing; negative current limit; soft-start internally fixed at 2.8 ms; soft-end for output discharge; 200 kHz / 300 kHz, 300 kHz / 400 kHz, 400 kHz / 500 kHz (OUT1 / OUT2 selectable switching frequency); selectable pulse skip and no-audible skip modes at light loads; independent power good signals
The STEVAL-ISA053V2 is a demonstration board designed to test the performance of the PM6680A dual synchronous step-down controller. The board employs a typical application circuit with two switching sections, providing typically 3.3 V and 1.8 V outputs from a 6 V to 36 V input voltage range. Each switching section delivers more than 2.5 A of output current.
In addition to the switching outputs, the board features an internal linear regulator that provides a 5 V output at 100 mA peak current. The document includes a circuit schematic and revision history for the board.
| Controller | PM6680A dual synchronous step-down controller |
|---|---|
| Input voltage range | 6 V to 36 V |
| Auxiliary output voltage | 5 V |
| Switching outputs | Adjustable |
| Output current per section | More than 2.5 A |
| Internal LDO output | 5 V @ 100 mA peak current |
| Switching frequencies | 200 kHz / 300 kHz, 300 kHz / 400 kHz, 400 kHz / 500 kHz |
The typical operating switching sections provide 3.3 V and 1.8 V outputs.
The board accepts an input voltage range of 6 V to 36 V.
Each switching section delivers more than 2.5 A of output current.