General Description
The MAX5092A/MAX5092B/MAX5093A/MAX5093B low quiescent-current, low-dropout (LDO) regulators contain simple boost preregulators operating at a high frequency. The devices seamlessly provide a preset 3.3V (MAX5092A/MAX5093A) or 5V (MAX5092B/MAX5093B) LDO output voltage from a cold-crank through load-dump (3.5V to 80V) input voltage conditions. The MAX5092_/MAX5093_ deliver up to 250mA with excellent load and line regulation. During normal operation, when the battery is healthy, the boost preregulator is completely turned off, reducing quiescent current to 65μA (typ). This makes the devices suitable for always-on power supplies.

FEATUREs
♦ Wide Operating Input Voltage Range: 3.5V to 72V
   with a 4V Startup Voltage
♦ LDO Output Regulates to 5V Seamlessly from an
   Input Voltage of 3.5V to 72V
♦ Up to 250mA Output Current
♦ Preset 3.3V, 5V, or Externally Programmable LDO
   Output Voltage from 1.5V to 9V (MAX5092_) or
   from 1.5V to 10V (MAX5093_)
♦ Preset 7V or Externally Programmable Boost
   Output Voltage Up to 11V (MAX5092_) or Up to
   12V (MAX5093_)
♦ 65µA Quiescent Current in LDO Mode (VIN ≥8V)
♦ 5µA Shutdown Current
♦ Power-On Reset (RESET) with Programmable
   Timeout Period
♦ Output Short-Circuit and Thermal Protection
♦ TQFN Package Capable of Dissipating Up to 2.7W
   at +70°C

APPLICATIONs
   Automotive—Body Electronics
   Automotive—ECU
   Industrial