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LTC4260CSW Datasheet(PDF) 1 Page - Linear Technology |
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LTC4260CSW Datasheet(HTML) 1 Page - Linear Technology |
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1 / 28 page  LTC4260 1 4260f , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Allows Safe Insertion into Live Backplane ■ 8-Bit ADC Monitors Current and Voltage ■ I2C TM/SMBus Interface ■ Wide Operating Voltage Range: 8.5V to 80V ■ High Side Drive for External N-Channel MOSFET ■ Input Overvoltage/Undervoltage Protection ■ Optional Latchoff or Autoretry After Faults ■ Alerts Host After Faults ■ Foldback Current Limiting ■ Available in 24-Lead SO, 24-Lead Narrow SSOP and 32-Lead (5mm × 5mm) QFN Packages Positive High Voltage Hot Swap Controller with I2C Compatible Monitoring ■ Electronic Circuit Breakers ■ Live Board Insertion ■ Computers, Servers Hot Swap is a trademark of Linear Technology Corporation. I2C is a trademark of Philips Electronics N.V. The LTC ®4260 Hot SwapTM controller allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at an adjustable rate. An I2C interface and onboard ADC allow monitoring of board current, voltage and fault status. The device features adjustable analog foldback current limit with latch off or automatic restart after the LTC4260 remains in current limit beyond an adjustable time-out delay. The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card and power-up in either the on or off state. UV BACKPLANE PLUG-IN CARD 2.67k * 1.74k 49.9k 48V SDA SCL ALERT GND VDD SENSE LTC4260 INTVCC 100k FDB3632 0.010Ω 10Ω 6.8nF CL 43.5k 3.57k VOUT 48V 24k 68nF *DIODES INC. SMBT70A 0.1µF 0.1µF GATE TIMER GND FB BD_PRST ADIN GPIO 4260 TA01 SOURCE OV SDAO SDAI SCL ALERT ON + FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO VIN 50V/DIV VOUT 50V/DIV GPIO 5V/DIV 25ms/DIV 4260 TA02 IIN 2A/DIV CL = 1000µF Power Up Waveforms 3A, 48V Card Resident Application |
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