LTC4418
Dual Channel Prioritized
PowerPath Controller
FEATURES DESCRIPTION Selects Highest Priority Supply from Two Inputs
nn Blocks Reverse and Cross Conduction Currents
nn Wide Operating Voltage Range: 2.5V to 40V
nn -42V Protection Against Reverse Connection
nn 60V Tolerant V1, V2 Inputs
nn Adjustable Input Validation Time
nn Fast Switchover Minimizes Output Voltage Droop
nn Low 26µA Operating Current
nn ±1.5% Input Overvoltage/Undervoltage Protection
nn Adjustable Overvoltage/Undervoltage Hysteresis
nn Cascadable for Additional Input Supplies
nn 20-Lead 4mm × 4mm QFN Package The LTC®4418 connects one of two valid power supplies
to a common output based on priority and validity. Priority
is defined by pin assignment, with V1 assigned the higher
priority and V2 the lower priority. A power supply is defined
as valid when its voltage has been within its overvoltage
(OV) and undervoltage (UV) window continuously for at
least the configured validation time. If the highest priority
valid input falls out of the OV/UV window, the channel is
immediately disconnected and the other valid input is connected to the common output. Multiple LTC4418s, as well
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