LTC2950-1/LTC2950-2 Pushbutton On/Off Controller Fea T Descrip T n Adjustable Pushbutton On/Off Timers The LTC 2950 is a micropower, wide input voltage range, n Low Supply Current: 6A pushbutton ON/OFF controller. The part contains a pushbut- n Wide Operating Voltage Range: 2.7V to 26.4V ton input with independently programmable ON and OFF n EN Output (LTC2950-1) Allows DC/DC Converter debounce times that control the toggling of an open drain Control enable output. The part also contains a simple micropro- n EN Output (LTC2950-2) Allows Circuit Breaker cessor interface to allow for proper system housekeeping Control prior to power down. Under system fault conditions, an n Simple Interface Allows Graceful P Shut Down internal KILL timer ensures proper power down. n High Input Voltage PB Pin with Internal Pull Up The LTC2950 operates over a wide 2.7V to 26.4V input Resistor voltage range to accommodate a wide variety of input n 10kV ESD HBM on PB Input power supplies. Very low quiescent current (6A typical) n Accurate 0.6V Threshold on KILL Comparator Input makes the LTC2950 ideally suited for battery powered n 8-Pin 3mm 2mm DFN and ThinSOT Packages applications. Two versions of the part are available to ac- commodate either positive or negative enable polarities. a T The parts are available in either 8-lead 3mm 2mm DFN or ThinSOT packages. n Portable Instrumentation Meters L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Blade Servers ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Portable Customer Service PDA n Desktop and Notebook Computers Typical a T Turn On Debounce V IN 2.7V TO 26.4V V V IN OUT DC/DC BUCK SHDN** EN R1 2V/DIV V EN IN 10k PB LTC2950-1 INT INT P/C PB KILL KILL ONT OFFT GND 2950 TA01 2950 TA01b 10ms/DIV C * C * ONT OFFT 0.033F 0.033F *OPTIONAL **SHDN INTERNALLY PULLED UP BY DC/DC 295012fd 1 ion pplica ions pplica ion uresLTC2950-1/LTC2950-2 a Te Maxi Mu M r a T (Note 1) Supply Voltage (V ) .................................. 0.3V to 33V Operating Temperature Range IN Input Voltages LTC2950C-1 ............................................. 0C to 70C PB ............................................................. 6V to 33V LTC2950C-2 ............................................. 0C to 70C ONT ...................................................... 0.3V to 2.7V LTC2950I-1 ..........................................40C to 85C OFFT ..................................................... 0.3V to 2.7V LTC2950I-2 ..........................................40C to 85C KILL ......................................................... 0.3V to 7V Storage Temperature Range Output Voltages DFN Package ..................................... 65C to 125C INT ......................................................... 0.3V to 10V TSOT-23 ............................................. 65C to 150C EN/EN .................................................... 0.3V to 10V Lead Temperature (Soldering, 10 sec) ...................300C p in c F T TOP VIEW TOP VIEW GND 1 8 INT V 1 8 KILL IN ONT 2 7 EN/EN 7 OFFT PB 2 9 PB 3 6 OFFT ONT 3 6 EN/EN 4 5 KILL V GND 4 5 INT IN TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DDB8 PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFN T = 125C, = 140C/W JMAX JA T = 125C, = 165C/W JMAX JA EXPOSED PAD (PIN 9) PCB GND CONNECTION OPTIONAL o r Der i n F Ma T Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2950CDDB-1 TRMPBF LTC2950CDDB-1 TRPBF LBKP 8-Lead Plastic DFN 0C to 70C LTC2950CDDB-2 TRMPBF LTC2950CDDB-2 TRPBF LBNG 8-Lead Plastic DFN 0C to 70C LTC2950IDDB-1 TRMPBF LTC2950IDDB-1 TRPBF LBKP 8-Lead Plastic DFN 40C to 85C LTC2950IDDB-2 TRMPBF LTC2950IDDB-2 TRPBF LBNG 8-Lead Plastic DFN 40C to 85C LTC2950CTS8-1 TRMPBF LTC2950CTS8-1 TRPBF LTBKN 8-Lead Plastic TSOT-23 0C to 70C LTC2950CTS8-2 TRMPBF LTC2950CTS8-2 TRPBF LTBNF 8-Lead Plastic TSOT-23 0C to 70C LTC2950ITS8-1 TRMPBF LTC2950ITS8-1 TRPBF LTBKN 8-Lead Plastic TSOT-23 40C to 85C LTC2950ITS8-2 TRMPBF LTC2950ITS8-2 TRPBF LTBNF 8-Lead Plastic TSOT-23 40C to 85C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: