DC2417A-B Analog Devices

LTC4367 100V Overvoltage, Undervoltage and Reverse Supply Protection Controller FEATURES DESCRIPTION n Wide Operating Voltage Range: 2.5V to 60V The LTC 4367 protects applications where power sup- n Overvoltage Protection to 100V ply input voltages may be too high, too low or even n Reverse Supply Protection to 40V negative. It does this by controlling the gate voltages of n LTC4367: Blocks 50Hz and 60Hz AC Power a pair of external N-channel MOSFETs to ensure that the n LTC4367: 32ms Recovery from Fault output stays within a safe operating range.The LTC4367 n LTC4367-1: Fast 500s Recovery from Fault withstands voltages between 40V and 100V and has an n No Input Capacitor or TVS Required for Most operating range of 2.5V to 60V, while consuming only Applications 70A in normal operation. n Adjustable Undervoltage and Overvoltage Thresholds Two comparator inputs allow configuration of the over- n Controls Back-to-Back N-Channel MOSFETs voltage (OV) and undervoltage (UV) set points using an n Low Operating Current: 70A external resistive divider. A shutdown pin provides external n Low Shutdown Current: 5A control for enabling and disabling the MOSFETs as well n 8-Pin MSOP and 3mm 3mm DFN Packages as placing the device in a low current shutdown state. A n AEC-Q100 Qualified for Automotive Applications fault output indicates that the GATE pin is pulling low when the part is in shutdown or the input voltage is outside the UV and OV set points. APPLICATIONS The LTC4367 has a 32ms turn-on delay that debounces n Portable Instrumentation live connections and blocks 50Hz to 60Hz AC power. For n Industrial Automation fast recovery after faults, the LTC4367-1 has a reduced n Automotive Surge (Load Dump) Protection turn-on delay of 500s. n Network Equipment All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 24V Automotive Application with +100V, 40V Protection Load Protected from Reverse and Overvoltage at V IN Si7942 V V OV = 36V IN OUT +70V 24V 2A UV = 7V 20V/DIV V IN GATE V V IN OUT VALID WINDOW 464k GND SHDN V V OUT OUT 1500k UV 40V FAULT 121k V 20V/DIV IN OV OV = 36V UV = 7V 29.4k GND 4367 TA01b 4367 TA01a 200ms/DIV LTC4367 Rev. C 1 Document Feedback For more information www.analog.comLTC4367 ABSOLUTE MAXIMUM RATINGS (Note 1, Note 2) Supply Voltage Input Currents V ........................................................ 40V to 100V SHDN, UV .........................................................1mA IN Input Voltages (Note 3) OV ......................................................................1mA UV, SHDN .............................................. 0.3V to 80V Operating Ambient Temperature Range OV ............................................................ 0.3V to 5V LTC4367C ................................................ 0C to 70C V ....................................................... 0.3V to 80V LTC4367I .............................................40C to 85C OUT Output Voltages LTC4367H .......................................... 40C to 125C FAULT ..................................................... 0.3V to 80V Storage Temperature Range .................. 65C to 150C GATE (Note 4) ......................................... 40V to 75V Lead Temperature (Soldering, 10sec) for MSOP Only ..................................................300C PIN CONFIGURATION TOP VIEW TOP VIEW V 1 8 GATE IN V 1 8 GATE UV 2 7 V IN OUT 9 UV 2 7 V OUT OV 3 6 FAULT 6 OV 3 FAULT GND 4 5 SHDN GND 4 5 SHDN MS8 PACKAGE 8-LEAD PLASTIC MSOP DD PACKAGE T = 150C, = 160C/W JMAX JA 8-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 9) PCB GROUND CONNECTION OPTIONAL T = 150C, = 43C/W, = 5.5C/W JMAX JA JC Rev. C 2 For more information www.analog.com