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

Applications

Portable Instrumentation
Industrial Automation
Laptops
Automotive Surge Protection

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC4365CDDB-1#PBF	3x2 DFN-8	C	$2.18
LTC4365CDDB-1#TRMPBF	3x2 DFN-8	C	$2.18	$1.54
LTC4365CDDB-1#TRPBF	3x2 DFN-8	C	$2.13	$1.49
LTC4365CDDB#PBF	3x2 DFN-8	C	$2.18
LTC4365CDDB#TRMPBF	3x2 DFN-8	C	$2.18	$1.54
LTC4365CDDB#TRPBF	3x2 DFN-8	C	$2.13	$1.49
LTC4365CTS8-1#PBF	SOT-23	C	$2.18
LTC4365CTS8-1#TRMPBF	SOT-23	C	$2.18	$1.54
LTC4365CTS8-1#TRPBF	SOT-23	C	$2.13	$1.49
LTC4365CTS8#PBF	SOT-23	C	$2.18
LTC4365CTS8#TRMPBF	SOT-23	C	$2.18	$1.54
LTC4365CTS8#TRPBF	SOT-23	C	$2.13	$1.49
LTC4365HDDB-1#PBF	3x2 DFN-8	H	$2.63
LTC4365HDDB-1#TRMPBF	3x2 DFN-8	H	$2.63	$1.85
LTC4365HDDB-1#TRPBF	3x2 DFN-8	H	$2.58	$1.80
LTC4365HDDB#PBF	3x2 DFN-8	H	$2.63
LTC4365HDDB#TRMPBF	3x2 DFN-8	H	$2.63	$1.85
LTC4365HDDB#TRPBF	3x2 DFN-8	H	$2.58	$1.80
LTC4365HTS8-1#PBF	SOT-23	H	$2.63
LTC4365HTS8-1#TRMPBF	SOT-23	H	$2.63	$1.85
LTC4365HTS8-1#TRPBF	SOT-23	H	$2.58	$1.80
LTC4365HTS8#PBF	SOT-23	H	$2.63
LTC4365HTS8#TRMPBF	SOT-23	H	$2.63	$1.85
LTC4365HTS8#TRPBF	SOT-23	H	$2.58	$1.80
LTC4365IDDB-1#PBF	3x2 DFN-8	I	$2.39
LTC4365IDDB-1#TRMPBF	3x2 DFN-8	I	$2.39	$1.69
LTC4365IDDB-1#TRPBF	3x2 DFN-8	I	$2.34	$1.64
LTC4365IDDB#PBF	3x2 DFN-8	I	$2.39
LTC4365IDDB#TRMPBF	3x2 DFN-8	I	$2.39	$1.69
LTC4365IDDB#TRPBF	3x2 DFN-8	I	$2.34	$1.64
LTC4365ITS8-1#PBF	SOT-23	I	$2.39
LTC4365ITS8-1#TRMPBF	SOT-23	I	$2.39	$1.69
LTC4365ITS8-1#TRPBF	SOT-23	I	$2.34	$1.64
LTC4365ITS8#PBF	SOT-23	I	$2.39
LTC4365ITS8#TRMPBF	SOT-23	I	$2.39	$1.69
LTC4365ITS8#TRPBF	SOT-23	I	$2.34	$1.64

Demo Boards


Part Number	Description	Price
DC1555B	LTC4365CTS8 Demo Board: High Voltage NFET Driver for UV, OV and Reverse Supply Protection	$25.00
DC1555C-B	LTC4365CTS8-1 Demo Board \| High Voltage NFET Driver for UV, OV and Reverse Supply Protection with 1ms Fault Recovery	$25.00