A4405

A4405 Constant On-Time Buck Regulator With One External and Two Internal Linear Regulators Features and Benefits AEC-Q100 Grade 0 qualified Internal buck pre-regulator followed by LDO outputs 5.5 to 36 V VIN operating range (50 V maximum); for start/stop, cold crank, and load dump requirements 2.2 MHz constant on-time buck regulator Valley current sensing achieves shortest buck on-times 50 V absolute maximum input voltage for surges 5.5 to 46 V input voltage range −40ºC to 150ºC junction temperature range Power-on reset (NPOR pin) with adjustable rising delay 5 V (V5P pin) internal low dropout tracking linear regulator with both overcurrent foldback and short-to-battery protection Continued on the next page… Package: 20-pin TSSOP with exposed thermal pad (suffix LP) Not to scale Description The A4405 is an automotive power management IC that uses a high frequency constant on-time 5.45 V pre-regulator to supply two internal 5 V linear...