LTC2954 Pushbutton On/Off Controller with P Interrupt FEATURES DESCRIPTION n Adjustable Power On/Off Timers The LTC 2954 is a pushbutton on/off controller that n Low Supply Current: 6A manages system power via a pushbutton interface. An n Wide Operating Voltage Range: 2.7V to 26.4V enable output toggles system power while an interrupt n Low Leakage EN Output (LTC2954-1) Allows DC/DC output provides debounced pushbutton status. The inter- Converter Control rupt output can be used in menu driven applications to n High Voltage EN Output (LTC2954-2) Allows Circuit request a system power-down. A power kill input allows Breaker Control a microprocessor or system to reset the enable output, n Simple Interface Allows Graceful P Shutdown effectively powering down the system. Independently n High Input Voltage PB Pin with Internal Pull-Up adjustable on and off timers allow dependable pushbutton Resistor control of the enable output and resistance to accidental n 10kV ESD HBM on PB Input toggling of system power. n Accurate 0.6V Threshold on KILL Comparator Input The LTC2954 operates over a wide 2.7V to 26.4V input volt- n 8-Pin 3mm 2mm DFN and ThinSOT Packages age range to accommodate a wide variety of input power supplies. Very low quiescent current (6A typical) makes APPLICATIONS the LTC2954 ideally suited for battery powered applications. Two versions of the part are available to accommodate n Pushbutton PowerPath Control either positive or negative enable polarities. n Portable Instrumentation Meters L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Blade Servers PowerPath and ThinSOT 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 APPLICATION Pushbutton On/Off with Interrupt V V IN OUT TURN-ON PULSE SHORT PULSE LONG PULSE DC/DC + PB 100k 100k 9V EN TURNS ON STAYS ON TURNS OFF 10k V EN IN LTC2954-2 INT INT INT P/C INTERRUPT INTERRUPT PB KILL KILL 2954 TA01b ONT PDT GND 2954 TA01a 1F t = 6.4 SECONDS PDT 2954fb 1LTC2954 (Note 1) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) .................................. 0.3V to 33V Operating Temperature Range IN Input Voltages LTC2954C-1 ............................................. 0C to 70C PB ............................................................ 6V to 33V LTC2954C-2 ............................................. 0C to 70C ONT ...................................................... 0.3V to 2.7V LTC2954I-1 ..........................................40C to 85C PDT ....................................................... 0.3V to 2.7V LTC2954I-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 33V Lead Temperature (Soldering, 10 sec) ...................300C PIN CONFIGURATION TOP VIEW TOP VIEW GND 1 8 INT V 1 8 KILL IN ONT 2 7 EN/EN PB 2 7 PDT 9 PB 3 6 PDT ONT 3 6 EN/EN V KILL 4 5 GND 4 5 INT IN TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DDB PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFNs T = 125C, = 140C/W JMAX JA T = 125C, = 165C/W JMAX JA EXPOSED PAD (PIN 9) PCB GND CONNECTION OPTIONAL ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2954CDDB-1 PBF LTC2954CDDB-1 TRPBF LCJG 8-Lead (3mm 2mm) Plastic DFN 0C to 70C LTC2954CDDB-2 PBF LTC2954CDDB-2 TRPBF LCNJ 8-Lead (3mm 2mm) Plastic DFN 0C to 70C LTC2954IDDB-1 PBF LTC2954IDDB-1 TRPBF LCJG 8-Lead (3mm 2mm) Plastic DFN 40C to 85C LTC2954IDDB-2 PBF LTC2954IDDB-2 TRPBF LCNJ 8-Lead (3mm 2mm) Plastic DFN 40C to 85C LTC2954CTS8-1 PBF LTC2954CTS8-1 TRPBF LTCJH 8-Lead Plastic TSOT-23 0C to 70C LTC2954CTS8-2 PBF LTC2954CTS8-2 TRPBF LTCNK 8-Lead Plastic TSOT-23 0C to 70C LTC2954ITS8-1 PBF LTC2954ITS8-1 TRPBF LTCJH 8-Lead Plastic TSOT-23 40C to 85C LTC2954ITS8-2 PBF LTC2954ITS8-2 TRPBF LTCNK 8-Lead Plastic TSOT-23 40C to 85C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2954CDDB-1 LTC2954CDDB-1 TR LCJG 8-Lead (3mm 2mm) Plastic DFN 0C to 70C LTC2954CDDB-2 LTC2954CDDB-2 TR LCNJ 8-Lead (3mm 2mm) Plastic DFN 0C to 70C LTC2954IDDB-1 LTC2954IDDB-1 TR LCJG 8-Lead (3mm 2mm) Plastic DFN 40C to 85C LTC2954IDDB-2 LTC2954IDDB-2 TR LCNJ 8-Lead (3mm 2mm) Plastic DFN 40C to 85C LTC2954CTS8-1 LTC2954CTS8-1 TR LTCJH 8-Lead Plastic TSOT-23 0C to 70C LTC2954CTS8-2 LTC2954CTS8-2 TR LTCNK 8-Lead Plastic TSOT-23 0C to 70C LTC2954ITS8-1 LTC2954ITS8-1 TR LTCJH 8-Lead Plastic TSOT-23 40C to 85C LTC2954ITS8-2 LTC2954ITS8-2 TR LTCNK 8-Lead Plastic TSOT-23 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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