LTC4364-1/LTC4364-2 Surge Stopper with Ideal Diode FEATURES DESCRIPTION n Wide Operating Voltage Range: 4V to 80V The LTC 4364 surge stopper with ideal diode controller n Withstands Surges Over 80V with V Clamp protects loads from high voltage transients. It limits and CC n Adjustable Output Clamp Voltage regulates the output during an overvoltage event, such n Ideal Diode Controller Holds Up Output Voltage as load dump in automobiles, by controlling the voltage During Input Brownouts drop across an external N-channel MOSFET pass device. n Reverse Input Protection to 40V The LTC4364 also includes a timed, current limited circuit n Reverse Output Protection to 20V breaker. In a fault condition, an adjustable fault timer must n Overcurrent Protection expire before the pass device is turned off. The LTC4364-1 n Low 10A Shutdown Current at 12V latches off the pass device while the LTC4364-2 automati- n Adjustable Fault Timer cally restarts after a delay. The LTC4364 precisely monitors n 0.1% Retry Duty Cycle During Faults (LTC4364-2) the input supply for overvoltage (OV) and undervoltage n Available in 4mm 3mm 14-Lead DFN, 16-Lead MSOP, (UV) conditions. The external MOSFET is held off in un- and 16-Lead SO Packages dervoltage and auto-retry is disabled in overvoltage. An integrated ideal diode controller drives a second MOS- APPLICATIONS FET to replace a Schottky diode for reverse input protec- n Automotive/Avionic Surge Protection tion and output voltage holdup. The LTC4364 controls the n Hot Swap/Live Insertion forward voltage drop across the MOSFET and minimizes n Redundant Supply ORing reverse current transients upon power source failure, n Output Port Protection brownout or input short. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Overvoltage Protector Regulates Output at 27V During Input Transient 4A, 12V Overvoltage Output Regulator with Ideal Diode C = 6.8F 92V INPUT SURGE TMR Withstands 200V 1ms Transient at V IN I = 0.5A LOAD V IN V 10m 20V/DIV FDB33N25 FDB3682 OUT V IN CLAMPED 12V 12V + AT 27V 383k 22F 27V CLAMP (ADJUSTABLE) CMZ5945B 2.2k 6.8nF 10 V OUT 12V 68V 20V/DIV 4364 TA01b 50ms/DIV 102k V HGATE SOURCE DGATE SENSE OUT CC SHDN FB Ideal Diode Holds Up Output UV 4.99k UV During Input Short 6V LTC4364 90.9k 12V C = 6300F LOAD OV ENOUT ENABLE INPUT SHORTED I = 0.5A OV V LOAD IN 60V TO GND FLT FAULT 10V/DIV 10k GND TMR 436412 TA01a 0.22F OUTPUT HELD UP 12V V OUT 10V/DIV 4364 TA01c 1ms/DIV 436412f 1LTC4364-1/LTC4364-2 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) FB, TMR Voltages ..................................... 0.3V to 5.5V Supply Voltage: V ................................. 40V to 100V CC Operating Ambient Temperature Range SOURCE, OV, UV, SHDN Voltages ............. 40V to 100V LTC4364C ................................................ 0C to 70C DGATE, HGATE Voltages LTC4364I .............................................40C to 85C (Note 3) ..................... SOURCE 0.3V to SOURCE + 10V LTC4364H .......................................... 40C to 125C ENOUT, FLT Voltages ................................ 0.3V to 100V Storage Temperature Range .................. 65C to 150C OUT, SENSE Voltages.................................20V to 100V Lead Temperature (Soldering, 10 sec) Voltage Difference (SENSE to OUT) ............ 30V to 30V MS, SO Packages .............................................300C Voltage Difference (OUT to V ) ..............100V to 100V CC Voltage Difference (SENSE to SOURCE) ..100V to 100V PIN CONFIGURATION TOP VIEW TOP VIEW OUT 1 16 FB OUT 1 14 FB TOP VIEW SENSE 2 15 TMR SENSE 2 13 TMR OUT 1 16 FB NC 3 14 SENSE 2 15 TMR ENOUT DGATE 3 12 ENOUT NC 3 14 ENOUT DGATE 4 13 FLT SOURCE 4 15 11 FLT DGATE 4 13 FLT SOURCE 5 12 GND SOURCE 5 12 HGATE 5 10 GND GND HGATE 6 11 OV V 6 9 OV NC 7 10 UV HGATE 6 11 CC OV V 8 9 SHDN CC SHDN 7 8 UV NC 7 10 UV MS PACKAGE V 8 9 SHDN 16-LEAD PLASTIC MSOP CC DE PACKAGE 14-LEAD (4mm 3mm) PLASTIC DFN T = 150C, = 120C/W JMAX JA S PACKAGE T = 150C, = 45C/W JMAX JA 16-LEAD PLASTIC SO EXPOSED PAD (PIN 15) PCB GND CONNECTION OPTIONAL T = 150C, = 100C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4364CDE-1 PBF LTC4364CDE-1 TRPBF 43641 14-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC4364IDE-1 PBF LTC4364IDE-1 TRPBF 43641 40C to 85C 14-Lead (4mm 3mm) Plastic DFN LTC4364HDE-1 PBF LTC4364HDE-1 TRPBF 43641 14-Lead (4mm 3mm) Plastic DFN 40C to 125C LTC4364CDE-2 PBF LTC4364CDE-2 TRPBF 43642 14-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC4364IDE-2 PBF LTC4364IDE-2 TRPBF 43642 14-Lead (4mm 3mm) Plastic DFN 40C to 85C LTC4364HDE-2 PBF LTC4364HDE-2 TRPBF 43642 40C to 125C 14-Lead (4mm 3mm) Plastic DFN LTC4364CMS-1 PBF LTC4364CMS-1 TRPBF 43641 16-Lead Plastic MSOP 0C to 70C LTC4364IMS-1 PBF LTC4364IMS-1 TRPBF 43641 16-Lead Plastic MSOP 40C to 85C LTC4364HMS-1 PBF LTC4364HMS-1 TRPBF 43641 16-Lead Plastic MSOP 40C to 125C LTC4364CMS-2 PBF LTC4364CMS-2 TRPBF 43642 16-Lead Plastic MSOP 0C to 70C LTC4364IMS-2 PBF LTC4364IMS-2 TRPBF 43642 16-Lead Plastic MSOP 40C to 85C LTC4364HMS-2 PBF LTC4364HMS-2 TRPBF 43642 16-Lead Plastic MSOP 40C to 125C 436412f 2