data brief for further information contact your local stmicroelectronics sales office. december 2011 doc id 022622 rev 1 1/4 4 STEVAL-ISA063V2 1 a, high efficiency single inductor dc-dc converter based on the stbb1-apur features buck-boost dc-dc converter operating input voltage range: 2.0 v to 5.5 v 2% dc feedback voltage tolerance synchronous rectification shutdown function 1.5 mhz switching frequency power save mode at light load typical efficiency: > 94% 1 a output current capability shutdown current: < 1 a rohs compliant description the STEVAL-ISA063V2 demonstration board implements a typical buck-boost dc-dc converter based on stmi croelectronics? stbb1- apur high efficiency single inductor dual mode buck-boost dc-dc converter. the device is fixed frequency and capable of providing output voltages ranging from 1.2 v to 5.5 v and input voltages from 2.0 v to 5.5 v. the stbb1-apur can operate with input voltages higher than, equal to, or lower than the output voltage, rendering the product suitable for single lithium-ion (li-i on), multicell alkaline or nimh applications where the output voltage is within the battery voltage range. the integrated low-r dson n-channel and p- channel mosfet switches contribute to its high efficiency. STEVAL-ISA063V2 www.st.com
schematic diagram STEVAL-ISA063V2 2/4 doc id 022622 rev 1 1 schematic diagram figure 1. STEVAL-ISA063V2 circuit schematic ! - # . 6 ) . # . ' . $ 6 ) . ' . $ - / $ % 3 9 . # % . # . 6 ) . ' . $ % . # . 6 ) . ' . $ - / $ % 3 9 . # # . 6 / 5 4 # . ' . $ 6 / 5 4 6 ) . 6 ) . ! 6 / 5 4 ' . $ ' . $ ' . $ ' . $ ' . $ 0 ' . $ & |