This is a data brief about the ST1S09 evaluation board. The evaluation board is a 2A / 1.2V high-efficiency synchronous buck converter designed for low-voltage applications, replacing high current linear solutions. It has an input voltage range of 2.7V to 5.5V, maximum output current of 2A, high internal switching frequency of 1.5MHz, short-circuit protection, and comes in a DFN6 3x3 package. The evaluation board uses current mode PWM topology and low ESR surface-mount ceramic capacitors to ensure low output ripple. The ST1S09 also has thermal protection and current limiting to prevent damage from accidental short-circuits.
The STEVAL-ISA045V1 is an evaluation board designed for the ST1S09 family of synchronous step-down DC-DC converters. It is optimized for low-voltage applications and replaces high-current linear solutions where power dissipation causes significant heating. The board provides up to 2 A of output current over an input voltage range of 2.7 V to 5.5 V.
| Input voltage range | 2.7 V to 5.5 V |
|---|---|
| Output voltage | 1.2 V |
| Max Iout | 2 A |
| Switching frequency | 1.5 MHz |
The board provides up to 2 A over an input voltage range of 2.7 V to 5.5 V.
The device features a high internal switching frequency of 1.5 MHz.
The ST1S09 family is available in the DFN6 3x3 package.