DC1505A Analog Devices

LTC4360-1/LTC4360-2 Overvoltage Protection Controller FEATURES DESCRIPTION n 2.5V to 5.5V Operation The LTC 4360 overvoltage protection controller safe- n Overvoltage Protection Up to 80V guards 2.5V to 5.5V systems from power supply over- n No Input Capacitor or TVS Required for Most voltage. It is designed for portable devices with multiple Applications power supply options including wall adaptors, car battery n 2% Accurate 5.8V Overvoltage Threshold adaptors and USB ports. n <1s Overvoltage Turn-Off, Gentle Shutdown The LTC4360 controls an external N-channel MOSFET in n Controls N-Channel MOSFET series with the input power supply. During overvoltage n Adjustable Power-Up dV/dt Limits Inrush transients, the LTC4360 turns off the MOSFET within 1s, n Reverse Voltage Protection (LTC4360-2) isolating downstream components from the input supply. n Power Good Output Inductive cable transients are absorbed by the MOSFET n Low Current Shutdown (LTC4360-1) and load capacitance. In most applications, the LTC4360 n Available in a Tiny 8-Lead SC70 Package provides protection from transients up to 80V without requiring transient voltage suppressors or other external components. APPLICATIONS n The LTC4360 has a delayed start-up and an adjustable USB Protection n dV/dt ramp-up for inrush current limiting. A PWRGD pin Handheld Computers n provides power good monitoring for V . Following an Cell/Smart Phones IN n overvoltage condition, the LTC4360 automatically restarts MP3/MP4 Players n with a start-up delay. The LTC4360-1 features a soft shut- Digital Cameras down controlled by the ON pin, while the LTC4360-2 con- All registered trademarks and trademarks are the property of their respective owners. trols an optional external P-channel MOSFET for negative voltage protection. TYPICAL APPLICATION Protection from Overvoltage Output Protected from Overvoltage at Input V V Si1470DH IN OUT V IN 5V 5V 1.5A C OUT GATE V IN OUT OUT V , V IN OUT 5V/DIV LTC4360-1 ON PWRGD V GATE 10V/DIV GND 436012 TA01a 436012 TA01b Si1470DH 0.5s/DIV C = 10F OUT Rev B 1 Document Feedback For more information www.analog.comLTC4360-1/LTC4360-2 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Bias Supply Voltage (IN) ............................ 0.3V to 85V Operating Temperature Range Input Voltages LTC4360C ................................................ 0C to 70C OUT, ON ................................................... 0.3V to 9V LTC4360I .............................................40C to 85C Output Voltages Storage Temperature Range .................. 65C to 150C PWRGD .................................................... 0.3V to 9V Lead Temperature (Soldering, 10 sec) ...................300C GATE (Note 3) ........................................ 0.3V to 15V GATEP .................................................... 0.3V to 85V IN to GATEP ........................................... 0.3V to 10V PIN CONFIGURATION LTC4360-1 LTC4360-2 TOP VIEW TOP VIEW IN 1 8 GATE IN 1 8 GATEP GND 2 7 OUT GND 2 7 GATE GND 3 6 ON GND 3 6 OUT GND 4 5 PWRGD GND 4 5 PWRGD SC8 PACKAGE SC8 PACKAGE 8-LEAD PLASTIC SC70 8-LEAD PLASTIC SC70 T = 125C, = 270C/W T = 125C, = 270C/W JMAX JA JMAX JA ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4360CSC8-1 TRMPBF LTC4360CSC8-1 TRPBF LDXN 8-Lead Plastic SC70 0C to 70C LTC4360CSC8-2 TRMPBF LTC4360CSC8-2 TRPBF LDXP 8-Lead Plastic SC70 0C to 70C LTC4360ISC8-1 TRMPBF LTC4360ISC8-1 TRPBF LDXN 8-Lead Plastic SC70 40C to 85C LTC4360ISC8-2 TRMPBF LTC4360ISC8-2 TRPBF LDXP 8-Lead Plastic SC70 40C to 85C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult ADI Marketing for parts specified with wider operating temperature ranges. Consult ADI Marketing 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