LT4253AIGN, LT4253I, LT4254 Selling Leads, Datasheet
MFG:LINEAR Package Cooled:SSOP16 D/C:2008+
LT4253AIGN, LT4253I, LT4254 Datasheet download
Part Number: LT4253AIGN
MFG: LINEAR
Package Cooled: SSOP16
D/C: 2008+
LT4253AIGN, LT4253I, LT4254
- Table of contents:
Info of LT4253AIGN
Info of LT4253I
Info of LT4254
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About LT4000-S
PDF/DataSheet Download
Datasheet: LT4000-S
File Size: 80993 KB
Manufacturer: LEM [LEM]
Download : Click here to Download
About LT4000-S
PDF/DataSheet Download
Datasheet: LT4000-S
File Size: 80993 KB
Manufacturer: LEM [LEM]
Download : Click here to Download
About LT4254
PDF/DataSheet Download
Datasheet: LT4254
File Size: 278240 KB
Manufacturer: LINER [Linear Technology]
Download : Click here to Download
LT4254 General Description
The LT®4254 is a high voltage Hot SwapTM controller that allows a board to be safely inserted and removed from a live backplane. An internal driver controls the high side N-channel MOSFET gate for supply voltages ranging from
10.8V to 36V. The part features an open-circuit detect (OPEN) output that indicates abnormally low load current
conditions.
The LT4254 features an adjustable analog foldback current limit. If the supply remains in current limit for more
than a programmable time, the N-channel MOSFET shuts off, the PWRGD output goes low and the LT4254 either
automatically restarts after a time-out delay or latches off until the UV pin is cycled low. The RETRY pin sets whether the part will automatically restart after an overcurrent fault or if it will latch off until the UV pin is cycled low. The PWRGD output indicates when the output voltage rises above a programmed level. An external resistor
string from VCC provides programmable undervoltage and overvoltage protection.
The LT4254 is available in a 16-lead SSOP package.
10.8V to 36V. The part features an open-circuit detect (OPEN) output that indicates abnormally low load current
conditions.
The LT4254 features an adjustable analog foldback current limit. If the supply remains in current limit for more
than a programmable time, the N-channel MOSFET shuts off, the PWRGD output goes low and the LT4254 either
automatically restarts after a time-out delay or latches off until the UV pin is cycled low. The RETRY pin sets whether the part will automatically restart after an overcurrent fault or if it will latch off until the UV pin is cycled low. The PWRGD output indicates when the output voltage rises above a programmed level. An external resistor
string from VCC provides programmable undervoltage and overvoltage protection.
The LT4254 is available in a 16-lead SSOP package.
LT4254 Maximum Ratings
Supply Voltage (VCC) .................................. 0.3 to 44V
Input Voltage (SENSE, PWRGD) ................. 0.3 to 44V
Input Voltage (GATE) .................................. 0.3 to 50V
Input Voltage (FB, UV, OPEN) ..................... 0.3 to 44V
Input Voltage (OV) ...................................... 0.3 to 18V
Input Voltage (RETRY) ............................... 0.3 to 15V
Minimum Input Voltage (TIMER) ......................... 0.3V
Maximum Input Current (TIMER) ....................... 100mA
Operating Temperature
LT4254C ................................................. 0°C to 70°C
LT4254I ............................................. 40°C to 85°C
Storage Temperature Range ................ 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LT4254 Features
Allows Safe Board Insertion and Removal from Live Backplane
Controls Supply Voltage from 10.8V to 36V
Foldback Current Limiting
Open Circuit and Overcurrent Fault Detect
Drives an External N-Channel MOSFET
Automatic Retry or Latched Off Operation After Overcurrent Fault
Programmable Supply Voltage Power-Up Rate
Undervoltage and Overvoltage Protection
Open MOSFET Detection
Controls Supply Voltage from 10.8V to 36V
Foldback Current Limiting
Open Circuit and Overcurrent Fault Detect
Drives an External N-Channel MOSFET
Automatic Retry or Latched Off Operation After Overcurrent Fault
Programmable Supply Voltage Power-Up Rate
Undervoltage and Overvoltage Protection
Open MOSFET Detection
LT4254 Typical Application
Hot Board Insertion
Electronic Circuit Breaker/Power Bussing
Industrial High Side Switch/Circuit Breaker
24V Industrial/Alarm Systems
12V and 24V Distributed Power Systems
Electronic Circuit Breaker/Power Bussing
Industrial High Side Switch/Circuit Breaker
24V Industrial/Alarm Systems
12V and 24V Distributed Power Systems
LT4254 Connection Diagram
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