for further information contact your local stmicroelectronics sales office. april 2012 doc id 023067 rev 1 1/4 4 STEVAL-ISA070V1 3 a / 1.5 mhz step-down synchronous switching regulator based on the st1s31 in so-8 package data brief features 4 a peak output current 2.8 v to 5.5 v input voltage output voltage adjustable from 0.8 v 1.5 mhz switching frequency internal soft-start and enable integrated 60 m and 45 m power mosfets all ceramic capacitor power good (por) cycle-by-cycle current limiting current foldback short-circuit protection rohs compliant description the STEVAL-ISA070V1 demonstration board is based on the st1s31, an internally compensated 1.5 mhz fixed-frequency pwm synchronous step-down regulator. this device operates from 2.8 v to 5.5 v input, while it regulates an output voltage as low as 0.8 v and up to v in . the peak current mode control with internal compensation delivers a very compact solution with a minimum component count. www.st.com
schematic diagram STEVAL-ISA070V1 2/4 doc id 023067 rev 1 1 schematic diagram figure 1. schematic diagram 6 ) . 3 7 3 7 6 & " 0 ' ' . $ % . 3 4 3 # i n ? s w ? & # o u t ? & , ? ( 2 2 6 ) . ! # i n ? a n ? & 2 6 / 5 4 6 ) . ! - v
STEVAL-ISA070V1 revision history doc id 023067 rev 1 3/4 2 revision history table 1. document revision history date revision changes 11-apr-2012 1 initial release.
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