FTM Board Club
2 A step down DC - DC switching regulator (VIN = 4.5 V to 60 V) based on the L7987L

The STEVAL-ISA198V1 product evaluation board is a step-down switching power supply based on the L7987L regulator in an HTSSOP16 package. The output voltage can be set starting from 0.8 V. Low drop-out operation, due to the advanced integrated switch management, can be achieved.

The L7987L is a 61 V, 2 A step-down asynchronous switching regulator with embedded power MOSFET capable of delivering up to 2 A 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.
The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1.5 MHz; two L7987L regulators can be synchronized in a 180 out-of-phase configuration for reduced total input RMS current.

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