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LTC2953 数据表(PDF) 1 Page - Linear Technology |
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LTC2953 数据表(HTML) 1 Page - Linear Technology |
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1 / 20 page  LTC2953 1 2953f TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION Push Button On/Off Controller with Voltage Monitoring The LTC®2953 is a push button On/Off controller that manages system power via a push button interface. An enable output toggles system power while an interrupt output provides debounced push button status. The inter- rupt output can be used in menu driven applications to request a system power down. The LTC2953 also features input and output power sup- ply monitors. An uncommitted power fail comparator provides real time input monitor information, while a de-glitched under voltage lockout comparator gracefully initiates a system power down. The under voltage lockout comparator prevents the system from powering from a low power supply. The adjustable supply monitor input is compared against an accurate internal 0.5V reference. The reset output remains low until the supply monitor input has been in compliance for 200ms. The LTC2953 operates over a wide 2.7V to 27V input voltage range and draws only 14μA of current. Two ver- sions of the part accommodate either positive or negative enable polarities. Push Button On/Off Control with Interrupt ■ Wide Operating Voltage Range: 2.7V to 27V ■ Push Button Control of System Power ■ Low Supply Current: 14μA ■ Power Fail Comparator Generates Warning ■ UVLO Comparator Gracefully Latches Power Off ■ Adjustable Supply Monitor with 200ms Reset ■ Adjustable Power Down Timer ■ Low Leakage EN Output (LTC2953-1) Allows DC/DC Converter Control ■ High Voltage ⎯E⎯N Output (LTC2953-2) Allows Circuit Breaker Control ■ Simple Interface Allows Orderly System Power Up and Power Down ■ ±1.5% Threshold Tolerances ■ ±10kV ESD HBM on ⎯P⎯B Input ■ 12-Pin 3mm × 3mm DFN ■ Push Button Power Path Control ■ Battery Power Supervisor ■ Portable Instrumentation, PDA ■ Blade Servers ■ 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. TURN ON PULSE TURNS ON STAYS ON INTERRUPT INTERRUPT TURNS OFF SHORT INTERRUPT PULSE LONG TURN OFF PULSE PB INT 2954 TD01b EN VIN VOUT ON/OFF EN VIN VM RST PFO INT KILL RST GPIO INT KILL LTC2953-1 PDT DC/DC SHDN SYSTEM LOGIC 8.4V 3.3V 499k 100k 100k 100k 100k 100k tPDT = 6.4 SECONDS 2953 TA01 1 μF PB GND PFI UVLO 2150k 23.2k 196k + |
类似零件编号 - LTC2953_15 |
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类似说明 - LTC2953_15 |
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