Datasheet Linear Technology LTC4419 — Datenblatt

LTC4419
18V Dual Input Micropower
PowerPath Prioritizer
FEATURES DESCRIPTION Selects Highest Priority Valid Supply from Two Inputs
nn Wide 1.8V to 18V Operating Range
nn Internal Dual 2О©, 0.5A Switches
nn Low 3.6ВµA Operating Current
nn Low 320nA V2 Current When V1 Connected to OUT
nn Blocks Reverse and Cross Conduction Currents
nn Reverse Supply Protection to –15V
nn V2 Freshness Seal/Ship Mode
nn В±1.5% Accurate Adjustable Switchover Threshold
nn Two Auxiliary В±2.3% Accurate Voltage Comparators
nn Overcurrent and Thermal Protection
nn Thermally Enhanced 10-Pin 3mm Г— 3mm DFN
and 12-Lead Exposed Pad MSOP Packages The LTCВ®4419 is a dual input monolithic PowerPathв„ў
prioritizer with low operating current, that provides backup
switchover for keeping critical circuitry alive during brown
out and power loss conditions. Unlike diode-OR products,
little current is drawn from the inactive supply even if its
voltage is greater than the active supply. nn APPLICATIONS
Low Power Battery Backup
Portable Equipment …