The LT8494HFE#PBF is an adjustable frequency current mode SEPIC/boost/flyback DC to DC converter in 20 pin TSSOP package. The quiescent current is less than 7μA when operating and is equivalent to 0.3μA when SWEN is low. The low ripple burst mode operation maintains high efficiency at low output current while keeping output ripple below 10mV. Dual supply pins (VIN and BIAS) allow regulator to automatically operate from most efficient supply. Input supply voltage is up to 60V for SEPIC topologies and up to 32V (with ride through up to 60V) for boost and flyback topologies. After start-up, battery life is extended so that LT8494 can draw current from its output (BIAS) even when VIN voltage drops below 2.5V. A power good flag indicated when VOUT reaches 92% of programmed output voltage. This monolithic switching regulator has integrated frequency foldback and soft start functions.
NPN power switch output is rated for 2A and 70V
Programmable switching frequency from 250KHz to 1.5MHz
Wide input voltage range of 1V to 60V (2.5V to 32V for start-up)
PG functional for input supply down to 1.3V
UVLO programmable on SWEN pin
Soft start programmable with one capacitor
Operating junction temperature range from -40°C to 150°C
(EN)
