Features:	Latched Fault, Thermal Limit, UVLO
Base Part Number:	LTC4244
Feature Pins:	DRIVE, /FAULT, (OFF, /ON), PRECHARGE, /PWRGD, /RESETIN, /RESETOUT, TIMER
Supplier Device Package:	20-SSOP
Package / Case:	20-SSOP (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Current - Output (Max):	100mA, 500mA
Voltage - Supply:	3.3V, 5V, ±12V
Programmable Features:	Current Limit, Fault Timeout
Series:	--
Applications:	CompactPCI™
Internal Switch(s):	Both
Number of Channels:	4
Type:	Hot Swap Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PMIC - Hot Swap Controllers| LTC4244IGN#TRPBF Application Field and Working Principle

PMIC (Power Management Integrated Circuits) is a very important component in many electrical and electronic systems. Hot-swap controllers, as their name implies, enable the safe and efficient powering of devices or system boards under varying voltage conditions. The LTC4244IGN#TRPBF is a hot swap controller that enables safe power up and power down of system boards under varying load conditions.The LTC4244IGN#TRPBF is a low-side, single-channel MOSFET hot-swap controller. It lets designers maximize system reliability by constantly monitoring bus voltage and the total load current within the system. This controller enables protection from over temperature, overcurrent and over-voltage conditions in addition to offering bi-directional current limiting. It also allows for faster response times during system starts-up and shutdown.The LTC4244IGN#TRPBF has a wide operating voltage range, from 10 to 60V, which gives a greater flexibility when used in different applications. This controller also features active clamp control, a 4-bit programmable over-voltage protection threshold, as well as over-temperature, under-voltage and reverse current protection. It is also designed with an internal clamp current limit, providing 100 percent power limiting protection.The LTC4244IGN#TRPBF is suitable for a variety of applications such as automotive, industrial, networking, communications, consumer electronics, and LED lighting. It is designed to be used with a wide variety of devices such as radio base stations, computers, microprocessors, control systems, power supplies and other hot swap control systems.The working principle of the LTC4244IGN#TRPBF is based on a circuit topology consisting of two primary components: a low-side MOSFET and an integrated voltage clipping (VCC) IC. The MOSFET is placed between the load and the power supply and is used to enable controlled current flow. The VCC IC is used to provide thermal and over-voltage protection, as well as electrical protection against overcurrent, over-temperature and reverse-current conditions. The device is designed so that the current flow can be detected by measuring the voltage drop across the MOSFET. When an over-voltage, over-current or over-temperature condition is detected, it shuts down the power supply.In conclusion, the LTC4244IGN#TRPBF hot-swap controller is suitable for a variety of applications and provides reliable protection from over-voltage, over-current and over-temperature conditions. It also offers active clamp control and a 4-bit programmable over-voltage protection threshold. Its wide operating voltage range of 10 to 60V and fast response times make it suitable for a variety of applications where power can be safely and efficiently managed.

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