High-Side, n-Channel MOSFET Switch Driver

The MAX1614 drives high-side, n-channel power MOSFETs to provide battery power-switching functions in portable equipment. The n-channel power MOSFETs typically have one-third the on-resistance of p-channel MOSFETs of similar size and cost. An internal micropower regulator and charge pump generate the high-side drive output voltage, while requiring no external components.

The MAX1614 also features a 1.5%-accurate low-battery comparator that can be used to indicate a low-battery condition, provide an early power-fail warning to the system microprocessor, or disconnect the battery from the load, preventing deep discharge and battery damage. An internal latch allows for pushbutton on/off control with very low current consumption. Off-mode current consumption is only 6µA while normal operation requires less than 25µA. The MAX1614 is available in the space-saving µMAX® package that occupies about 60% less space than a standard 8-pin SO.

Applications

* Battery Packs * Handheld Instruments (PDAs, Palmtops) * Notebook Computers * Portable Equipment

* Integration Provides a Simple-to-Use Solution

* Requires No External Components

* Internal On/Off Latch Facilitates Pushbutton Control

* 1.5% Accurate Low-Battery Detector Protects Battery and Data Stored in Memory

* Controlled Turn-On for Low Inrush Current

* Low Power Consumption Extends Battery Life

* 25µA (max) Quiescent Current

* 6µA (max) Shutdown Current

* µMAX Package is 60% Smaller Than Typical 8-pin SO Solution

* Supports Typical Requirements of Portable, Battery- Powered Designs

* 5V to 26V Input Voltage Range

* Drives Single or Back-to-Back MOSFETs