LTC4236CUFD-1#PBF

Programmable Features:	Current Limit
Base Part Number:	LTC4236
Feature Pins:	--
Supplier Device Package:	28-QFN (4x5)
Package / Case:	28-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Current - Supply:	2.7mA
Operating Temperature:	0°C ~ 70°C
Current - Output (Max):	--
Voltage - Supply:	2.9 V ~ 18 V
Series:	--
Features:	Latched Fault
Applications:	General Purpose
Internal Switch(s):	No
Number of Channels:	2
Type:	Hot Swap Controller, OR Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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Application Field of LTC4236CUFD-1#PBF

LTC4236CUFD-1#PBF, also called Hot Swap Controllers, is a product of Linear Technology Company, which is an IC solution provider that is committed to provide advanced solutions for the most demanding systems. This Hot Swap Controller is mainly used for low power, hot-swap applications that leverage board-level power supply sequencing and in-rush current limit. It is ideal for powering-up many types of motherboards that consist of processors, FPGAs and ASICs where a reliable, accurate in-rush current limit and sequencing are necessary.

Working Principle of LTC4236CUFD-1#PBF

LTC4236CUFD-1#PBF works by regulating input current and controlling power off-on sequencing. This Hot Swap Controller consists of a reverse-blocking FET, two current limit circuits, an OFF/ON comparator, two undervoltage error flags, and a fast-start FET. It starts with the reverse-blocking FET conducting when the power is off, ensuring that system power is off during the hot-swap sequence. The integrated current limit circuits reduce power supply inrush currents by monitoring the power-on transient currents. When the high current transient occurs, the Hot Swap Controller will automatically limit the inrush current to a safe level. This will prevent system board components from being damaged due to large inrush currents.When the supply voltage reaches a pre-determined level, the Hot Swap Controller will enable the system power supply and the FET will open up. The fast-start FET will conducting and the supply voltage can starts to rise quickly. This Hot Swap Controller also monitors the system’s UVLO (Under Voltage Lock Out) to protect the system board components. In addition, it provides an open drain error flag to indicate when the system voltage is low.

Conclusion

LTC4236CUFD-1#PBF is a Hot Swap Controllers product from Linear Technology Company, which is a popular choice for low power, hot-swap applications that require board-level power supply sequencing and in-rush current limit. It consists of a reverse-blocking FET, two current limit circuits, an OFF/ON comparator, two undervoltage error flags, and a fast-start FET. This Hot Swap Controller is used to limit inrush current, enable power supply, and monitor UVLO to protect the system board components.

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