Circuit Protection Misc Adjustable Overcurrent and Overvoltage Protector

The MAX14573EUD+T adjustable overvoltage- and overcurrent-protection devices are ideal to protect systems against positive and negative input voltage faults up to Q40V and feature low 100m? (typ) RON FETs. The overvoltage-protector (OVP) feature protects voltages between 6V and 36V, while the undervoltage-protector (UVP) feature protects voltages between 4.5V and 24V. The overvoltage-lockout (OVLO) and undervoltage-lockout (UVLO) thresholds are set using optional external resistors. The factory-preset internal OVLO threshold is 33V (typ) and the preset internal UVLO threshold is 19.2V (typ). The ICs also feature programmable current-limit protection up to 4.2A. Once current reaches the threshold, the MAX14573EUD+T turns off after the 20.7ms (typ) blanking time and stays off during the retry period. The MAX14573EUD+T latches off after the blanking time, and the MAX14573EUD+T limits the current continuously. In addition, these devices feature reverse current and thermal-shutdown protection. The ICs are available in a small 14-pin TSSOP (5mm x 6.5mm) package and are specified over the extended -40°C to +85°C temperature range.

• Integrated Protection Increases System Reliability
  • Adjustable OVLO and UVLO Thresholds (±3% Accurate Preset Thresholds)
  • Automatic Internal and External Selection
  • Programmable Forward Current Limit (Adjustable Up to 4.2A) with ±15% Accuracy
  • Thermal-Shutdown Protection 100m? (typ) On-Resistance FET
• Special Features Facilitate Designs for Industrial Applications
  • Wide 4.5V to 36V Operating Input Range
  • Reverse-Current Flow Option for Inductive Loads
  • Independent Microprocessor Enable Input (EN)
  • and High-Voltage-Capable Input (HVEN)