This is a 2A/3.3V high-efficiency synchronous buck converter evaluation board based on the ST1S09, with a 2.7V to 5.5V input voltage range, 3.3V output voltage, 2A maximum current, 1.5MHz high internal switching frequency, short-circuit protection, etc.
The document describes the STEVAL-ISA045V2, an evaluation board designed as a 2 A/3.3 V high-efficiency synchronous buck converter. It is built around the ST1S09 family of synchronous step-down DC-DC converters and is optimized for low-voltage applications where linear solutions might cause excessive heating.
The board provides up to 2 A over an input voltage range of 2.7 V to 5.5 V, utilizing a high internal switching frequency of 1.5 MHz. This allows for the use of tiny surface-mount components. The design includes short-circuit protection and thermal protection features.
| Input voltage range | 2.7 V to 5.5 V |
|---|---|
| Output voltage | 3.3 V |
| Max output current | 2 A |
| Switching frequency | 1.5 MHz |
The board provides up to 2 A of output current.
The board operates with an input voltage range of 2.7 V to 5.5 V.
The converter has a high internal switching frequency of 1.5 MHz.