General Description

The MAX16033–MAX16040 supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery control functions in microprocessor (µP) systems. The devices significantly improve system reliability and accuracy compared to other ICs or discrete components. The MAX16033–MAX16040 provide µP reset, backup-battery switchover, power-fail warning, watchdog, and chip-enable gating features.

Features

♦ Low 1.2V Operating Supply Voltage

♦ Precision Monitoring of 5.0V, 3.3V, 3.0V, and 2.5V Power-Supply Voltages

♦ Independent Power-Fail Comparator

♦ Debounced Manual-Reset Input

♦ Watchdog Timer, 1.6s Timeout

♦ Battery-On Output Indicator

♦ Auxiliary User-Adjustable RESETIN

♦ Low 13µA Quiescent Supply Current

♦ Two Available Output Structures:

   Active-Low Push-Pull Reset

   Active-Low Open-Drain Reset

♦ Active-Low Reset Valid Down to 1.2V

♦ Power-Supply Transient Immunity

♦ 140ms (min) Reset Timeout Period

♦ Small 2mm x 2mm, 8-Pin and 10-Pin µDFN Packages

Applications

   Portable/Battery Powered Equipment

   POS Equipment

   Critical µP/µC Power Monitoring

   Set-Top Boxes

   Controllers

   Computers

   Fax Machines

   Industrial Control

   Real-Time Clocks

   Intelligent Instrument