LTC4253AIGN-ADJ#PBF

Programmable Features:	Circuit Breaker, Current Limit, Fault Timeout, OVP, UVLO
Base Part Number:	LTC4253
Feature Pins:	DRAIN, EN2, EN3, OV, /PWRGD1, /PWRGD2, /PWRGD3, RESET, SS, SQTIMER, TIMER, UV
Supplier Device Package:	16-SSOP
Package / Case:	16-SSOP (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Current - Supply:	1.1mA
Operating Temperature:	-40°C ~ 85°C
Current - Output (Max):	--
Voltage - Supply:	-48V
Series:	--
Features:	Latched Fault
Applications:	-48V
Internal Switch(s):	No
Number of Channels:	1
Type:	Hot Swap Controller, Sequencer
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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Introduction to LTC4253AIGN-ADJ#PBF

The LTC4253AIGN-ADJ#PBF board is a sophisticated power monitoring device designed to control the power distribution on a PCB. It comes with an onboard electrical isolation barrier, allowing it to be used as a hot-swap device. The device integrates a voltage-controlled current limiter, high-side MOSFET driver, overcurrent/undercurrent/overvoltage protection, and thermal shutdown circuitry. Moreover, the LTC4253AIGN-ADJ#PBF has a robust monitoring capability, providing real-time data for overcurrent, undervoltage and thermal shutdown cases that allow the power supply design to be more reliable.

Application Fields

The LTC4253AIGN-ADJ#PBF is a perfect fit for applications including systems with limited power deriver (PD) ports, where a seperate monitoring IC is needed. It is also used in remote powered systems, such as PDNs with multiple cables, as well as for powering distributed storage and computing in data centers. Furthermore, the device is ideal for power supplies with high-side MOSFET hot-swap applications. It is also used in embedded systems, robotics and unmanned machines.

Working Principle

The LTC4253AIGN-ADJ#PBF works by providing the necessary power control to the connected circuit. It starts by receiving current from an input source, such as an AC/DC converter. The device then uses the electrical isolation barrier to control the current to the output circuit. This barrier allows for overvoltage and overcurrent protection to ensure that the circuit is not damaged. The device can also limit the current with integrated voltage-controlled current limiters. This prevents overloading the connected components and keeps them within their specified current range. The device also monitors the voltage and current of the input and output circuit and provides a real-time reading to the system. The device also features a high-side MOSFET driver that controls the current output to the connected circuit. The MOSFET driver will disable the output when the input voltage drops below a certain threshold. Additionally, the LTC4253AIGN-ADJ#PBF has integrated self-protection circuits that will shut off the supply in the event of an overcurrent or overvoltage. Finally, the device includes a thermal shutdown circuit as an additional method of protection. The thermal protection prevents the device from overheating, safeguarding the connected components and ensuring longer life.

Conclusion

The LTC4253AIGN-ADJ#PBF is a powerful hot-swap controller suitable for use in high-side MOSFET hot-swap applications. It has integrated voltage-controlled current limiters, overcurrent and overvoltage protection, and a high-side MOSFET driver for current control. Additionally, the device monitors the voltage and current of the input and output circuits and provides thermal shutdown protection to keep the system safe. For these reasons, the LTC4253AIGN-ADJ#PBF board is a perfect fit for dense PCBs, distributed data centers, remote PDN applications and embedded systems.

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