LTC4380 Low Quiescent Current Surge Stopper FEATURES DESCRIPTION n Low Quiescent Current: 8A Operating The LTC 4380 low quiescent current surge stopper protects n Withstands Surge Voltage Up to the MOSFET Limit loads from high voltage transients. Overvoltage protection n Wide Operating Voltage Range: 4V to 72V is provided by clamping the gate voltage of an external n Overcurrent Protection N-channel MOSFET to limit the output voltage to a safe n Selectable Internal 31.5V/50V or Adjustable Gate value during overvoltage events such as load dump in Clamp Voltage automobiles. Fixed gate clamp voltages are selectable for n Reverse Input Protection to 60V 12V and 24V/28V systems. For systems of any voltage up n Adjustable Turn-On Threshold to 72V, use the adjustable gate clamp versions. Overcur- n Adjustable Fault Timer with MOSFET Stress rent protection is also provided. Acceleration An internal multiplier generates a TMR pin current pro- n Controls N-Channel MOSFET portional to V and I , so that operating time in both DS D n Latchoff and Retry Options overcurrent and overvoltage conditions is limited in ac- n Low Retry Duty Cycle During Faults cordance with MOSFET stress. n 10-Pin DFN (3mm 3mm) and MSOP Packages n The GATE pin can drive back-to-back MOSFETs for reverse AEC-Q100 Qualified for Automotive Applications input protection, eliminating the voltage drop and dissi- pation of a Schottky diode solution. A low 8A operating APPLICATIONS current permits use in always-on and battery powered n applications. An accurate ON pin comparator monitors Automotive/Avionic/Industrial Surge Protection n the input supply for undervoltage (UV) conditions and Hot Swap, Live Insertion n also serves as a shutdown input, reducing the quiescent High Side Switch for Battery Powered Systems n current to 6A. Automotive Load Dump Protection All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 9634481. TYPICAL APPLICATION 12V, 1A with 250V Overvoltage Protection Surge Stopper Limits Output to 27V During Input Surge 20m FDB33N25 12V/1A V C = 8.2F IN TMR 100V INPUT SURGE OUTPUT CLAMPED 12V I = 1A LOAD AT 27V (250V ) 22F PK 10 33 249k 10k 47nF V IN DRN GATE SNS OUT 20V/DIV 12V V CC LTC4380-2 FLT V OUT 0.1F 12V ON 20V/DIV GND TMR SEL 27V ADJUSTABLE CLAMP 68V 8.2F CMHZ5266B 4380 TA01b 100ms/DIV 4380 TA01a Rev. C 1 Document Feedback For more information www.analog.comLTC4380 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) V , ON, SEL ............................................... 60V to 80V FLT ............................................................. 0.3V to 80V CC DRN (Note 3), SNS, OUT I .......................................................................2.5mA DRN LTC4380-1/LTC4380-2........................... 0.3V to 53V Operating Ambient Temperature Range LTC4380-3/LTC4380-4 .......................... 0.3V to 80V LTC4380C ................................................ 0C to 70C SNS to OUT ..................................................... 5V to 5V LTC4380I .............................................40C to 85C GATE (Note 4) LTC4380H .......................................... 40C to 125C LTC4380-1/LTC4380-2........................... 0.3V to 53V Storage Temperature Range .................. 65C to 150C LTC4380-3/LTC4380-4 .......................... 0.3V to 86V Lead Temperature (Soldering, 10 sec) GATE to OUT, GATE to V (Note 4) ........... 0.3V to 10V MSOP ...............................................................300C CC TMR ............................................................. 0.3V to 5V PIN CONFIGURATION TOP VIEW TOP VIEW DRN 1 10 TMR DRN 1 10 TMR V 2 9 ON CC V 2 9 ON 11 CC GATE 3 8 GND GATE 3 8 GND GND SNS 4 7 FLT SNS 4 7 FLT OUT 5 6 SEL OUT 5 6 SEL MS PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE T = 150C, = 160C/W 10-LEAD (3mm 3mm) PLASTIC DFN JMAX JA T = 135C, = 43C/W JMAX JA EXPOSED PAD (PIN 11) IS GND, PCB CONNECTION OPTIONAL Rev. C 2 For more information www.analog.com