LTC4253CGN#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:	800µA
Operating Temperature:	0°C ~ 70°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:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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Introduction

LTC4253CGN#PBF is an integrated circuit PMIC (Power Management Integrated Circuit) belonging to the Hot Swap Controllers category. This hot swap controller is designed for monitoring and controlling current flow in applications that require inrush current limiting, power supply sequencing, current limiting and foldback, voltage clamping, and fault detection and reporting. These devices are capable of supporting a wide variety of applications and are improved over the basic circuits traditionally used, while reducing component count and complexity.

Features

The LTC4253CGN#PBF has a wide operating range of 4.5 V to 16 V, a low quiescent current when disabled, and a gage amplifier input range of 0 V to 6 V. It has a fast current-sense response time of 1 us and a slew rate limit of 10 V/�s. The LTC4253CGN#PBF also features an adjustable current limit and short circuit protection, as well as an active-low undervoltage lockout with adjustable reset threshold.In addition, the LTC4253CGN#PBF has an overvoltage protection of up to 24 V, enabling it to protect against input overvoltage conditions. It also has an adjustable overcurrent limit, allowing it to work with any current-limited application. Furthermore, the LTC4253CGN#PBF features protection against short circuit or other fault conditions, ensuring maximum protection for equipment and components.

Application Field

The LTC4253CGN#PBF is ideal for applications that require hot swap control, such as server blades, base boards, and high current computing applications. It can also be used in other applications that require current monitoring, such as motor control, power distribution systems, and embedded systems.The LTC4253CGN#PBF provides an integrated solution for hot swap control, allowing designers to reduce component count while maintaining reliable and robust protection against common fault conditions. Its adjustable slew rate limit also allows designers to optimize hot swap performance.

Working Principle

The LTC4253CGN#PBF can be used as a stand-alone device or as part of an integrated hot swap system. In a stand-alone configuration, it monitors the voltage on the gate of its power MOSFET and disconnects the power MOSFET from the load if the voltage falls below the preset undervoltage lockout threshold. This will ensure that the device does not become damaged due to an excessive inrush current or overvoltage condition.When used as part of an integrated system, the LTC4253CGN#PBF is used to provide current-limit protection, allowing it to work in applications with any current-limited source. The device also has an adjustable overcurrent limit, enabling designers to provide additional protection against any overcurrent condition.The LTC4253CGN#PBF can be used to provide accurate and reliable control over current and voltage monitoring in hot swap applications, as well as other current monitoring applications. The device is designed for high reliability and robust protection and is optimal for applications that require precise control and monitoring of voltage in order to safely execute hot-swap operations.

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