this is information on a product in full production. june 2013 docid18279 rev 5 1/37 st1cc40 3 a monolithic step-down curre nt source with synchronous rectification datasheet - production data features ? 3.0 v to 18 v operating input voltage range ? 850 khz fixed switching frequency ? 100 mv typ. current sense voltage drop ? 6 ? a standby current in inhibit mode ? ?? 7% output current accuracy ? synchronous rectification ? 95 m ?? hs / 69 m ? ls typical r ds(on) ? peak current mode architecture ? embedded compensation network ? internal current limiting ? ceramic output capacitor compliant ? thermal shutdown applications ? battery charger ? signage ? emergency lighting ? high brightness led driving ? general lighting description the st1cc40 device is an 850 khz fixed switching frequency monolithic step-down dc-dc converter designed to operate as precise constant current source wi th an adjustable current capability up to 3 a dc . the regulated output current is set connecting a sensing resistor to the feedback pin. the embedded synchronous rectification and the 100 mv typical r sense voltage drop enhance the efficiency performance. the size of the overall application is minimized thanks to the high switching frequency and ceramic output capacitor compatibility. the device is fully protected against thermal overheating, overcurrent and output short-circuit. inhibit mode minimizes the current consumption in standby. the st1cc40 is available in vfqfpn8 4 mm x 4 mm 8-lead, and standard so8 package. vfqfpn8 4x4 figure 1. typical application circuit # ) . # & |