LT4423数据手册ADI中文资料规格书

描述 Description

The LT®4423 is a 1.9V to 28V ideal diode and load switchwith integrated P-channel MOSFETs. When enabled,15mV forward voltage regulation minimizes powerdissipation while increasing operating headroom andefficiency compared to a Schottky diode.

Using two LT4423s in diode-OR applications provide aseamless transfer to the highest available voltage undervarying input supply conditions. A non-enabled LT4423blocks up to 28V in either direction or polarity whileexhibiting less than 1μA (typical) leakage current,providing orders of magnitude improvement overtypical Schottky diodes, which leads to extendedbattery life.

Fast OUT to IN reverse bias detection minimizes reversecurrent, preventing undesired charging of inputbatteries. The open-drain STATUS output pulls lowwhen the LT4423 is in shutdown, reverse bias, or underthermal protection. Integrated thermal detectionprotects from overtemperature conditions by disablingthe power path.

APPLICATIONS


Schottky Diode Replacement

Battery and Wall Adapter Diode ORing

Backup Battery Diode ORing

Industrial and Consumer Hand-Held Applications

特性 Features

• Internal 200mΩ Power Path 
• Wide Operating Voltage Range: 1.9V to 28V 
• Reverse Current Protection
• Load Switch Capability
• Low 10μA Quiescent Current
• Fast 3μs Response to Load Steps
• Low 500nA Off State Current
• Smooth Switchover in Diode-OR Applications
• Integrated Thermal Protection
• 10-Lead (3mm x 2mm x 0.75mm) LDFN Package