STEVAL-SPSA068 [STMicroelectronics]

The STEVAL-SPSA068 is a tool designed to evaluate SPSA068, a BUCK voltage regulator with a precise voltage reference for automotive MCU applications. All the regulators have internal power switches.

An internal programmable memory allows selecting the main device parameters. STEVAL-SPSA068 has been programmed in the following condition: VOUT = 1.2 V, switching frequency = 400 kHz, watchdog disabled, VREF enabled, OV/UV = +/-5%.

The SPSA068 is already programmed, so no external microcontroller is necessary to control the STEVAL-SPSA068 application. It is possible to set a VOUT different than 1.2 V by using an external resistor divider.

• 4.2 V to 19 V input operating voltage
• 1.2 V output voltage without external resistor
• 1.2 V to 5 V output voltage using external resistor
• 400 kHz switching frequency
• 1 A load current
• Watchdog disabled
• +/-5% overvoltage/undervoltage thresholds
• Evaluation board design with optimized bill of materials
• VREF, tracking of VBUCK in power-up phase enabled
• Short circuit protected outputs and fault detection pin
• Thermal warning and thermal shutdown