حفاظت مدار محدودکننده‌های ولتاژ گذرا (تی وی اس) تجهیزات حفاظت در برابر اضافه‌ولتاژ گذرا (اس پی دی)

Product Attributes

Introduction

This IC targets dual voltage hot swap applications across the +2.5V to +3.3V (nominal) bias supply voltage range with a second lower voltage rail down to less than 1V. It features a charge pump for driving external N-Channel MOSFETs, regulated current protection and duration, output undervoltage monitoring and reporting, optional latch-off or retry response, and adjustable soft-start. The current regulation level (CR) for each rail is set by two external resistors and each CR duration is set by an external capacitor on the TIM pin. After the CR duration has expired the IC then quickly pulls down the associated GATE(s) output turning off its external FET(s). The ISL6173 offers a latched output or indefinite auto retry mode of operation. ISL6173 targets dual voltage hot-swap applications with a bias of 2.1V to 3.6VDC and the voltages being controlled down to 0.7VDC. The IC’s main function is to limit and regulate the inrush current into the loads. This is achieved by enhancing an external MOSFET in a controlled manner. In order to fully enhance the MOSFET, the IC must provide adequate gate to source voltage, which is typically 5V or greater. Hence, the final steady-state voltage on Gate (GT) pin must be 5V above the load voltage. Two internal chargepumps allow this to happen.

Features

• Fast Current Regulation amplifier quickly responds to overcurrent fault conditions
• Less than 1µs response Time to Dead Short
• Programmable Current Regulation Level and Duration
• Two Levels of Overcurrent Detection Provide Fast Response to Varying Fault Conditions
• Overcurrent Circuit Breaker and Fault Isolation functions
• Adjustable Current Regulation Threshold as low as 20mV
• Selectable Latch-off or Auto Retry Response to Fault conditions
• Adjustable voltage ramp-up for In-rush Protection During Turn-On
• Rail Independent Control, Monitoring and Reporting I/O
• Dual Supply Hot Swap Power Distribution Control to <1V
• Charge Pump Allows the use of N-Channel MOSFETs
• QFN Package: Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline - Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile
• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Power Supply Sequencing, Distribution and Control
• Hot Swap/Electronic Breaker Circuits