STEVAL-ISA095V1 STMicroelectronics

STEVAL-ISA095V1 Up to 3 A step-down switching regulator based on the ST1S14 Data brief Features 3 A DC output current Operating input voltage from 5.5 V to 48 V 850 kHz internally fixed switching frequency Internal soft-start Internal current limiting Inhibit for zero current consumption 2 mA maximum quiescent current over- temperature range Thermal shutdown STEVAL-ISA095V1 RoHS compliant Description The STEVAL-ISA095V1 demonstration board is designed to provide an evaluation platform for testing the ST1S14, a step-down monolithic power switching regulator capable of delivering up to 3 A of output current. The high current level is possible thanks to an HSOP8 package with exposed frame. The output voltage can be set from 1.22 V. An internal oscillator fixes the switching frequency at 850 kHz. A Power Good open collector output validates the regulated output voltage as soon as it reaches the regulated level. Pulse-by-pulse current limiting offers effective constant current short-circuit protection, while the current foldback decreases overstress in persistent short-circuit conditions. December 2011 Doc ID 022623 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Schematic diagram STEVAL-ISA095V1 1 Schematic diagram Figure 1. STEVAL-ISA095V1 circuit schematic 0 // N & 5 34 3 , 6 /54 4// 6 ). 2 6 ). 0 // %. 2 % N& 3403 , 5 2 3MALL SIGNAL ER PLANE W O 0 - 2/4 Doc ID 022623 Rev 1 37