LTC4242CUHF#TRPBF

Programmable Features:	Auto Retry, Current Limit, Latched Fault, Slew Rate
Base Part Number:	LTC4242
Feature Pins:	--
Supplier Device Package:	38-QFN (5x7)
Package / Case:	38-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Current - Supply:	1.6mA
Operating Temperature:	0°C ~ 70°C
Current - Output (Max):	--
Voltage - Supply:	2.7 V ~ 14.4 V
Series:	--
Features:	Fault Timeout, Thermal Limit, UVLO
Applications:	PCI Express®
Internal Switch(s):	Both
Number of Channels:	6
Type:	Hot Swap Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

The LTC4242CUHF#TRPBF is a hot swap controller designed by Linear Technology Corporation (LTC). It provides protection and power management for hot-swappable power sources. This page will discuss the application fields and working principle of the LTC4242CUHF#TRPBF.

Application Field

The LTC4242CUHF#TRPBF is an ideal solution for circuit design engineers to manage hot-swappable applications. It provides safe insertions and removesic of dual supply loads. It has been used in various applications, such as redundant power supplies, battery-operated devices, and hot-pluggable electronics.

Features

The LTC4242CUHF#TRPBF provides a wide range of features:

• Dual Load Supply Monitors and Controls
• High Side MOSFET Current Protection
• Adjustable Over-Voltage Protection
• Input Under-Voltage Protections
• Low Input Current Shutdown MOSFETs
• Loss of Ground Protections

Working Principle

The LTC4242CUHF#TRPBF features two output current limit nodes, VA and VB, that can be individually enabled, disabled, or limited using the INVA, INVB, and LIMVA, LIMVB pins, respectively. VA and VB are monitored by the over-voltage detection pins, OVPVAmax and OVPVBmax, and the ground paritivity pin, PGp. When VA and VB are enabled and within their respective over-voltage detection thresholds, the LTC4242CUHF#TRPCB will enable power MOSFETs M1A and M1B, respectively. The current through each of these MOSFETs, that is through VA and VB, can be adjusted using the two external resistors, PORTA and PORTB.The current through each MOSFET is detected and compared to the current limit value programmed by the two external resistors at the LIMVA and LIMVB pins. If a fault is detected, then the LTC4242CUHF#TRPBF will initiate a fault to the Over-Voltage Fault pin, OVFA, and the VA will be disabled, and the same for the VB.

Conclusion

The LTC4242CUHF#TRPBF is a hot swap controller designed by Linear Technology Corporation and is ideal for circuit design engineers to manage hot-swappable applications. It provides protection against overvoltage, undervoltage, and current overload situations. It also features current limit nodes, VA and VB, which can be individually enabled, disabled, or limited. In conclusion, the LTC4242CUHF#TRPBF offers an effective and reliable solution for hot swap controllers.

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