LTC4365 - Overvoltage, Undervoltage and Reverse Supply Protection Controller

The LTC®4365 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.

Features
  • 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 (ThinSOT™) Packages
Typical Application
LTC4365 Typical Application
LTC4365 Typical Application
Applications
  • Portable Instrumentation
  • Industrial Automation
  • Laptops
  • Automotive Surge Protection
Packaging
LTC4365 Package Drawing
LTC4365 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC4365CDDB-1#PBF3x2 DFN-8C$2.18
LTC4365CDDB-1#TRMPBF3x2 DFN-8C$2.18$1.54
LTC4365CDDB-1#TRPBF3x2 DFN-8C$2.13$1.49
LTC4365CDDB#PBF3x2 DFN-8C$2.18
LTC4365CDDB#TRMPBF3x2 DFN-8C$2.18$1.54
LTC4365CDDB#TRPBF3x2 DFN-8C$2.13$1.49
LTC4365CTS8-1#PBFSOT-23C$2.18
LTC4365CTS8-1#TRMPBFSOT-23C$2.18$1.54
LTC4365CTS8-1#TRPBFSOT-23C$2.13$1.49
LTC4365CTS8#PBFSOT-23C$2.18
LTC4365CTS8#TRMPBFSOT-23C$2.18$1.54
LTC4365CTS8#TRPBFSOT-23C$2.13$1.49
LTC4365HDDB-1#PBF3x2 DFN-8H$2.63
LTC4365HDDB-1#TRMPBF3x2 DFN-8H$2.63$1.85
LTC4365HDDB-1#TRPBF3x2 DFN-8H$2.58$1.80
LTC4365HDDB#PBF3x2 DFN-8H$2.63
LTC4365HDDB#TRMPBF3x2 DFN-8H$2.63$1.85
LTC4365HDDB#TRPBF3x2 DFN-8H$2.58$1.80
LTC4365HTS8-1#PBFSOT-23H$2.63
LTC4365HTS8-1#TRMPBFSOT-23H$2.63$1.85
LTC4365HTS8-1#TRPBFSOT-23H$2.58$1.80
LTC4365HTS8#PBFSOT-23H$2.63
LTC4365HTS8#TRMPBFSOT-23H$2.63$1.85
LTC4365HTS8#TRPBFSOT-23H$2.58$1.80
LTC4365IDDB-1#PBF3x2 DFN-8I$2.39
LTC4365IDDB-1#TRMPBF3x2 DFN-8I$2.39$1.69
LTC4365IDDB-1#TRPBF3x2 DFN-8I$2.34$1.64
LTC4365IDDB#PBF3x2 DFN-8I$2.39
LTC4365IDDB#TRMPBF3x2 DFN-8I$2.39$1.69
LTC4365IDDB#TRPBF3x2 DFN-8I$2.34$1.64
LTC4365ITS8-1#PBFSOT-23I$2.39
LTC4365ITS8-1#TRMPBFSOT-23I$2.39$1.69
LTC4365ITS8-1#TRPBFSOT-23I$2.34$1.64
LTC4365ITS8#PBFSOT-23I$2.39
LTC4365ITS8#TRMPBFSOT-23I$2.39$1.69
LTC4365ITS8#TRPBFSOT-23I$2.34$1.64
Demo Boards
Part NumberDescriptionPrice
DC1555BLTC4365CTS8 Demo Board: High Voltage NFET Driver for UV, OV and Reverse Supply Protection$25.00
DC1555C-BLTC4365CTS8-1 Demo Board | High Voltage NFET Driver for UV, OV and Reverse Supply Protection with 1ms Fault Recovery$25.00
Datasheet
Design Note
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
LTspice
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