MAX5024:65V, Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer

High-Voltage, Low-Quiescent-Current Linear Regulators Ideal for Automotive and Industrial Applications

The MAX5023/MAX5024 high-voltage linear regulators operate from a +6.5V to +65V input voltage and deliver up to 150mA of output current. These devices consume only 60µA of quiescent current with no load and withstand a -60V reverse-battery voltage at the input. The MAX5023/MAX5024 include an active-low internal microprocessor (µP) reset circuit that asserts when the regulator output drops below the preset output voltage threshold by 7.5% or 12.5%, depending on the device selected. Both devices are available with a fixed +3.3V or +5V output. These devices are short-circuit protected and include thermal shutdown. In addition to an enable input to turn on or off the regulator, the MAX5023/MAX5024 include an active-low HOLD input that allows for the implementation of a self-holding circuit without requiring external components. Setting active-low HOLD low after enabling the regulator, forces the regulator to remain on even if EN is subsequently set low. Releasing active-low HOLD shuts down the regulator. The MAX5023 includes a watchdog input that monitors a pulse train from the µP and generates reset pulses if the watchdog input remains high or low for a duration longer than the 1.6s watchdog timeout period. The MAX5024 includes a SET input which, when connected to ground, selects a preset output voltage of +3.3V (MAX5024S/MAX5024T) or +5V (MAX5024L/MAX5024M). Set the adjustable output voltage by connecting SET to the regulator's output through a resistive-divider network. The MAX5023/MAX5024 operate over the automotive temperature range (-40°C to +125°C) and are available in a thermally enhanced, surface-mount 8-pin SO-EP package.

Key Features
  • Wide Operating Input Voltage Range +6.5V to +65V
  • Thermally Enhanced 8-Pin SO Package with Exposed Pad Dissipates 1.5W
  • Guaranteed 150mA Output Current
  • 60µA No-Load Supply Current
  • -60V Reverse-Battery Protection
  • Preset +3.3V or +5.0V Output Voltage
  • Thermal and Short-Circuit Protection
  • Operate Over -40°C to +125°C Temperature Range
  • Integrated µP Reset Circuit
  • Watchdog Timer with 1.6s Timeout Period (MAX5023)
  • Regulator Enable and Hold Inputs Implement Self-Holding Circuit
  • SET Input for Adjustable Output Voltage (MAX5024)
MAX5023, MAX5024: Typical Operating Circuit
MAX5023, MAX5024: Typical Operating Circuit
  • Automotive
  • Fire/Smoke Alarms
  • Home Security
  • Industrial
  • Telecom/Networking
titleDownload file
MAX5023-MAX5024 Data SheetMAX5023-MAX5024.pdf
Part NumberRegulatorsVIN
Preset VOUT
Low Batt./ Pwr. Fail OutPOK/Reset Thresh.
WatchdogReverse Batt. Protect.Oper. Temp.
minmaxminmaxtypmaxnomSee Notes
YesNo-40 to +125SOIC(N)-EP/8$1.69 @1k
MAX50242.511NoYes-40 to +85
-40 to +125
0 to +70
0 to +85
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5024LASANo Longer AvailableMAX5024LASA+SOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CNo
MAX5024LASA+ActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024LASA+TActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024LASA-TNo Longer AvailableMAX5024LASA+TSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CNo
MAX5024MASALast Time BuySOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CNo
MAX5024MASA+ActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024MASA+TActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024MASA-TNo Longer AvailableMAX5024MASA+TN.SO;8 pin-40°C to +125°CSee data sheet
MAX5024SASANo Longer AvailableMAX5024SASA+SOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CNo
MAX5024SASA+ActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5024SASA+TActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024SASA-TNo Longer AvailableMAX5024SASA+TN.SO;8 pin-40°C to +125°CSee data sheet
MAX5024SASA/V+ActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024SASA/V+TActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024TASALast Time BuySOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CNo
MAX5024TASA+ActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024TASA+TActiveSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX5024TASA-TNo Longer AvailableMAX5024TASA+TSOIC(N)-EP,;8 pin;30.9 mm²-40°C to +125°CNo
MAX5023-MAX5024.pdf MAX5024
Pass Transistor Enhances Regulator's Output Current MAX5024
MAX5024.pdf MAX5024