High-Current Overvoltage Protectors with Adjustable OVLO

The MAX14586/MAX14590 overvoltage protection devices feature a low 48mΩ (typ) on-resistance (RON) internal FET and protect low-voltage systems against voltage faults up to +36V. When the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components.

The overvoltage protection threshold can be adjusted with optional external resistors to any voltage between 4V and 20V. With the OVLO input set below the external OVLO select voltage, the devices automatically choose the internal accurate trip thresholds. The internal overvoltage thresholds (OVLO) are preset to 7V typical (MAX14586) or 15V typical (MAX14590). The devices are also protected against overcurrent events by an internal thermal shutdown.

The MAX14586/MAX14590 are offered in a small, 8-pin TDFN package with exposed pad and operate over the -40°C to +85°C extended temperature range.

Applications

* Mobile Internet Devices * Smartphones * Tablet PCs

* Protect High-Power Portable Devices

* Wide Operating Input-Voltage Protection from +2.2V to +36V

* 3A Continuous Current Capability

* Integrated 40mΩ (typ) n-Channel MOSFET Switch

* Flexible Overvoltage Protection Design

* Adjustable Overvoltage Protection Trip Level

* Wide Adjustable OVLO Threshold Range from +4V to +20V

* Preset Internal Accurate OVLO Thresholds:

* 7V ±2.9% (MAX14586)

* 15V ±3.3% (MAX14590)

* Additional Protection Features Increase System Reliability

* Soft-Start to Minimize In-Rush Current

* Internal 15ms Startup Debounce

* Thermal-Shutdown Protection

* Minimize PCB Area

* 8-Pin TDFN (2mm x 2mm) Package