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A4405

Allegro Micro Systems
Part Number A4405
Manufacturer Allegro Micro Systems
Description Constant On-Time Buck Regulator
Published Aug 26, 2017
Detailed Description A4405 Constant On-Time Buck Regulator With One External and Two Internal Linear Regulators Features and Benefits • AEC-...
Datasheet PDF File A4405 PDF File

A4405
A4405



Overview
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...



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