DC1575B Analog Devices

LTC4362-1/LTC4362-2 1.2A Overvoltage/Overcurrent Protector FEATURES DESCRIPTION n 2.5V to 5.5V Operation The LTC 4362 monolithic overvoltage/overcurrent protec- n Overvoltage Protection Up to 28V tor safeguards 2.5V to 5.5V systems from power supply n Internal 40m N-Channel MOSFET and 31m R overvoltage. It is designed for portable devices with mul- SENSE n Avalanche Rated MOSFET Requires No Input tiple power supply options including wall adaptors, car Capacitor or TVS for Most Applications battery adaptors and USB ports. n <1s Overvoltage Turn-Off, Gentle Shutdown The LTC4362 controls an internal 40m N-channel n 2% Accurate 5.8V Overvoltage Threshold MOSFET in series with the input power supply. During n 20% Accurate 1.5A Overcurrent Threshold overvoltage transients, the LTC4362 turns off the MOSFET n Input Withstands Up to 25kV HBM ESD with within 1s, isolating downstream components from the 1F C OUT input supply. In most applications, the LTC4362 rides n Controlled Power-Up dV/dt Limits Inrush Current through inductive cable transients without requiring tran- n Reverse Voltage Protection Driver sient voltage suppressors or other external components. n Low Current Shutdown An internal current sense resistor is used to implement n Latchoff (LTC4362-1) or Auto-Retry (LTC4362-2) overcurrent protection. After Overcurrent n The LTC4362 has a delayed start-up at plug-in and Available in 8-Lead DFN 2mm 3mm Package controlled dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for V . The APPLICATIONS IN LTC4362 features a soft-shutdown controlled by the ON n USB Protection pin and drives an optional external P-channel MOSFET n Handheld Computers for negative voltage protection. Following an overvolt- n Cell/Smart Phones age condition, the LTC4362 automatically restarts with a n MP3/MP4 Players 130ms delay. After an overcurrent fault, the LTC4362-1 n Digital Cameras remains off while the LTC4362-2 automatically restarts All registered trademarks and trademarks are the property of their respective owners. after a 130ms delay. TYPICAL APPLICATION Protection from Overvoltage and Overcurrent Output Protected from Overvoltage at Input V OUT V IN V IN IN OUT 5V 5V 0.5A C OUT LTC4362 ON PWRGD V OUT GND 436212 TA01a V , V IN OUT 5V/DIV 436212 TA01b 0.2s/DIV C = 10F OUT Rev. B 1 Document Feedback For more information www.analog.comLTC4362-1/LTC4362-2 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1 and 2) TOP VIEW Bias Supply Voltage GATEP 1 8 OUT IN to OUT (Note 3) ................................. 0.3V to 28V IN 2 7 OUT Input Voltages 9 GND SENSE 6 ON 3 SENSE to OUT (Notes 3 and 4) .............. 0.3V to 28V SENSE 5 PWRGD 4 ON ........................................................... 0.3V to 9V DCB PACKAGE Output Voltages 8-LEAD (2mm 3mm) PLASTIC DFN OUT, PWRGD ........................................... 0.3V to 9V T = 125C, = 64C/W JMAX JA IN to GATEP ........................................... 0.3V to 10V Operating Temperature Range LTC4362C ................................................ 0C to 70C LTC4362I .............................................40C to 85C Storage Temperature Range ................. 65C to 150C ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4362CDCB-1 TRMPBF LTC4362CDCB-1 TRPBF LFNC 8-Lead Plastic DFN 0C to 70C LTC4362CDCB-2 TRMPBF LTC4362CDCB-2 TRPBF LFJN 8-Lead Plastic DFN 0C to 70C LTC4362IDCB-1 TRMPBF LTC4362IDCB-1 TRPBF LFNC 8-Lead Plastic DFN 40C to 85C LTC4362IDCB-2 TRMPBF LTC4362IDCB-2 TRPBF LFJN 8-Lead Plastic DFN 40C to 85C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Contact the factory for parts specified with wider operating temperature ranges. Contact the factory for information on lead based finish parts. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. B 2 For more information www.analog.com