Adjustable Overvoltage Protector with High Accuracy

The MAX14527/MAX14528 overvoltage protection devices feature a low 100mΩ (typ) RON internal FET and protect low-voltage systems against voltage faults up to +28V. 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 8V. With the OVLO input set below the external OVLO select voltage, the MAX14527/MAX14528 automatically choose the internal ±2.5% accurate trip thresholds. The internal overvoltage thresholds (OVLO) are preset to 5.75V typical (MAX14527) or 6.76V typical (MAX14528). The MAX14527/MAX14528 are also protected against overcurrent events with an internal thermal shutdown.

The MAX14527/MAX14528 are offered in a small, 8-pin TDFN-EP package and operate over the -40°C to +85°C extended temperature range.

Applications

* Cell Phones * Media Players * PDAs and Palmtop Devices

* Input Voltage Protection Up to +28V

* Preset Internal ±2.5% Accurate OVLO Thresholds

* 5.75V (MAX14527)

* 6.76V (MAX14528)

* Adjustable Overvoltage Protection Trip Level

* Integrated 100mΩ (typ) n-Channel MOSFET Switch

* Soft-Start to Minimize In-Rush Current

* Automatic Overvoltage Protection Trip-Level Selection

* Internal 15ms Startup Delay

* Thermal Shutdown Protection

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

* -40°C to +85°C Operating Temperature Range