LTC1696 Overvoltage Protection Controller FEATURES DESCRIPTION n 2% Overvoltage Threshold Accuracy The LTC 1696 is a standalone power supply overvolt- n Low Profile (1mm) ThinSOT Package age monitor and protection device designed to protect a n power supply load in the event of an overvoltage fault. It Gate Drive for SCR Crowbar or External N-Channel monitors two adjustable output voltages. If an overvoltage Disconnect MOSFET n condition is detected, the output drives either an external Monitors Two Output Voltages n SCR crowbar or turns off external back-to-back N-channel Senses Output Voltages from 0.8V to 24V n MOSFETs, thereby, disconnecting the input voltage from Wide Supply Range: 2.7V to 27V the power supply. n Multifunction TIMER/RESET Pin Pin 6 offers three functions. By connecting a capacitor to this pin, the internal glitch filter time delay can be APPLICATIONS programmed. Without the capacitor, the default time n Telecommunication Systems delay is determined by an internal capacitor. This pin also n Computer Systems serves as a reset input to clear the internal latch after an n Industrial Control Systems overvoltage fault condition. By pulling it high, the OUT n Notebook Computers pin is activated if the FB1 and FB2 voltages remain below the trip threshold. The LTC1696 is available in the low profile (1mm) ThinSOT package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation.All other trademarks are the property of their respective owners TYPICAL APPLICATION SCR Crowbar Overvoltage Response V OUT2 5V V POWER CC FB1 12V SUPPLY V OUT1 0.5V/DIV 3.3V R2 R4 TIMER/RESET 137k 232k 2V/DIV 1% 1% 1 6 TIMER/ FB1 RESET Q1 C1 RESET R1 2N7002 1nF I 44.2k LTC1696 OUT 20mA/DIV 1% 2 5 GND FB2 R3 44.2k C1 = 1nF 1% 3 4 V OUT CC 100s/DIV 1696 TA02 SCR C2 2N6507 0.1F 1696 TA01 1696fb 1 For more information www.linear.com/LTC1696LTC1696 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (V ) ................................................28V CC TOP VIEW Input Voltage TIMER/ FB1, FB2 ............................................... 0.3V to 17V FB1 1 6 RESET GND 2 5 FB2 TIMER/RESET ........................................ 0.3V to 17V V 3 4 OUT CC Operating Junction Temperature Range (Note 2) LTC1696E ........................................... 40C to 125C S6 PACKAGE 6-LEAD PLASTIC TSOT-23 LTC1696I............................................ 40C to 125C LTC1696H .......................................... 40C to 150C T = 150C, = 192C/W JMAX JA Storage Temperature Range ................... 65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1696ES6 PBF LTC1696ES6 TRPBF LTLT 6-Lead Plastic TSOT-23 40C to 125C LTC1696IS6 PBF LTC1696IS6 TRPBF LTLT 6-Lead Plastic TSOT-23 40C to 125C LTC1696HS6 PBF LTC1696HS6 TRPBF LTLT 6-Lead Plastic TSOT-23 40C to 150C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: