ADI LTC4365IDDB#PBF

The LTC4365 protects applications where power supply input voltages may be too high, too low or even negative. It does this by controlling the gate voltages of a pair of external N-channel MOSFETs to ensure that the output stays within a safe operating range. The LTC4365 can withstand voltages between - 40V and 60V and has an operating range of 2.5V to 34V, while consuming only 125μA in normal operation.

Two comparator inputs allow configuration of the overvoltage (OV) and undervoltage (UV) set points using an external resistive divider. A shutdown pin provides external control for enabling and disabling the MOSFETs as well as placing the device in a low current shutdown state. A fault output provides status of the gate pin pulling low. A fault is indicated when the part is in shutdown or the input voltage is outside the UV and OV set points.

The LTC4365 has a 36ms turn-on delay that debounces live connections and blocks 50Hz to 60Hz AC power. For fast recovery after faults, the LTC4365-1 has a reduced 1ms turn-on delay.

• Wide Operating Voltage Range: 2.5V to 34V
• Overvoltage Protection to 60V
• Reverse Supply Protection to - 40V
• LTC4365: Blocks 50Hz and 60Hz AC Power
• LTC4365-1: Fast (1ms) Recovery from Fault
• No Input Capacitor or TVS Required for Most Applications
• Adjustable Undervoltage and Overvoltage Protection Range
• Charge Pump Enhances External N-Channel MOSFET
• Low Operating Current: 125μA
• Low Shutdown Current: 10μA
• Compact 8-Lead, 3mm × 2mm DFN and TSOT-23 Packages

• Portable Instrumentation
• Industrial Automation
• Laptops
• Automotive Surge Protection