STEVAL-ISA198V1

The STEVAL-ISA198V1 from STMicroelectronics is an evaluation board which is a step-down switching power supply based on the L7987L regulator in an HTSSOP16 package. The output voltage can be set starting from 0.8V. Low drop-out operation, due to the advanced integrated switch management can be achieved. The L7987L is a 61V, 2A step-down asynchronous switching regulator with embedded power MOSFET capable of delivering up to 2A of current, depending on the application conditions. The embedded switch over feature on the VBIAS pin and the light load management (pulse skipping) help maximize power conversion efficiency across the entire load range. The soft-start, current limit threshold and switching frequency are adjustable for application optimization. It includes an internal 250KHz oscillator that can be externally adjusted up to 1.5MHz, Two L7987L regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current.

• 4.5V to 60V input voltage
• Step-down (buck) conversion
• 5V output voltage (VIN > 6V)
• Up to 2A DC output current
• 500KHz switching frequency, 5ms programmed soft-start
• Compliant with ceramic output capacitors
• 180° out of phase synchronization available
• Auto recovery overcurrent and thermal protection