SMPS: Voltage mode buck converter system.
Both buck converters can be activated via high voltage capable pins ON1 and/or ON2.

LDO1: High voltage input LDO
LDO2-4: Low voltage input LDOs

Power Monitoring:
PGOOD indicates... read more


  • Fixed frequency primary buck converter
    VIN max. 40V | VOUT from 4V to 6V | IOUT max. 800mA
  • Fixed frequency secondary buck converter
    VIN max. 6V | VOUT from 0.8V to 5.1V | IOUT max. 800mA
  • LDO 1 (Master) Input voltage max. to 40V supporting always-on mode, Outp. voltage progr. in 0.05V steps, IOUT max. 320mA
  • LDO 2 - 4 (with tracking option) Input voltage max. 6V
    Output voltage programmable in 0.05V steps, IOUT max. 350mA


Document Description Type
Info Sheet PDF 260 kB

Application diagram


  • Microcontroller supply
  • Voltage Regulator

Order Information

Distributor Inventory Search
Buy our Products at your local Distributor
Please note that you are leaving the Elmos website with this link.


Part No. TempJunc Range Package Order No.
E522.51 -40°C to +105°C QFN48L7 E52251A78B
Show cookie popup