LTC2953CDD-2#PBF Analog Devices

LTC2953 Push Button On/Off Controller with Voltage Monitoring FEATURES DESCRIPTION Wide Operating Voltage Range: 2.7V to 27V The LTC 2953 is a push button On/Off controller that Push Button Control of System Power manages system power via a push button interface. An Low Supply Current: 14A enable output toggles system power while an interrupt Power Fail Comparator Generates Warning output provides debounced push button status. The inter- UVLO Comparator Gracefully Latches Power Off rupt output can be used in menu driven applications to Adjustable Supply Monitor with 200ms Reset request a system power down. Adjustable Power Down Timer The LTC2953 also features input and output power sup- Low Leakage EN Output (LTC2953-1) Allows DC/DC ply monitors. An uncommitted power fail comparator Converter Control provides real time input monitor information, while a High Voltage EN Output (LTC2953-2) Allows Circuit de-glitched under voltage lockout comparator gracefully Breaker Control initiates a system power down. The under voltage lockout Simple Interface Allows Orderly System Power Up comparator prevents the system from powering from a and Power Down low power supply. 1.5% Threshold Tolerances The adjustable supply monitor input is compared against 10kV ESD HBM on PB Input an accurate internal 0.5V reference. The reset output 12-Pin 3mm 3mm DFN remains low until the supply monitor input has been in APPLICATIONS compliance for 200ms. Push Button Power Path Control The LTC2953 operates over a wide 2.7V to 27V input Battery Power Supervisor voltage range and draws only 14A of current. Two ver- Portable Instrumentation, PDA sions of the part accommodate either positive or negative Blade Servers enable polarities. Desktop and Notebook Computers , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Push Button On/Off Control with Interrupt V V IN OUT 2150k 100k 8.4V DC/DC 3.3V SHORT LONG TURN ON PULSE INTERRUPT PULSE TURN OFF PULSE UVLO V EN SHDN IN PB 100k 23.2k 499k LTC2953-1 PFI VM EN TURNS ON STAYS ON TURNS OFF 100k 196k 100k 100k INT RST RST PFO GPIO INTERRUPT INTERRUPT SYSTEM INT INT 2954 TD01b LOGIC PB KILL KILL GND PDT ON/OFF 2953 TA01 1F t = 6.4 SECONDS PDT 2953f 1 +LTC2953 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Supply Voltage (V ) .................................. 0.3V to 33V IN GND 1 12 INT Input Voltages V 2 11 EN/EN M PB, PFI, UVLO ........................................... 6V to 33V KILL 3 10 RST 13 PDT 4 9 PFO VM ......................................................... 0.3V to 20V 5 8 PFI PB KILL ....................................................... 0.3V to 10V 6 7 UVLO V IN PDT ....................................................... 0.3V to 2.7V DD PACKAGE Output Voltages 12-LEAD (3mm 3mm) PLASTIC DFN T = 125C, = 43C/W EN/EN, PFO ............................................ 0.3V to 50V JMAX JA EXPOSED PAD (PIN 13) PCB GROUND CONNECTION OPTIONAL RST, INT ................................................ 0.3V to 10V Operating Temperature Range LTC2953C ................................................ 0C to 70C LTC2953I ............................................. 40C to 85C Storage Temperature Range ................... 65C to 125C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2953CDD-1 PBF LTC2953CDD-1 TRPBF LCWT 12-Lead (3mm 3mm) Plastic DFN 0C to 70C LTC2953CDD-2 PBF LTC2953CDD-2 TRPBF LCQT 12-Lead (3mm 3mm) Plastic DFN 0C to 70C LTC2953IDD-1 PBF LTC2953IDD-1 TRPBF LCWT 12-Lead (3mm 3mm) Plastic DFN 40C to 85C LTC2953IDD-2 PBF LTC2953IDD-2 TRPBF LCQT 12-Lead (3mm 3mm) Plastic DFN 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: