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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

Product Details

Key Features

Parametric specs for Linear Regulators
VIN (V) (min) 6.5
VIN (V) (max) 65
Adj. VOUT (V) (min) 2.5
Adj. VOUT (V) (max) 11
Rated ILOAD (mA) 150
Preset VOUT (V) 5
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.9
ICC (µA) (max) 140
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-12.5%
Vout-7.5%
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
-40 to +125
0 to +70
0 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.02
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Simplified Block Diagram

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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 6.5
VIN (V) (max) 65
Adj. VOUT (V) (min) 2.5
Adj. VOUT (V) (max) 11
Rated ILOAD (mA) 150
Preset VOUT (V) 5
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.9
ICC (µA) (max) 140
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-12.5%
Vout-7.5%
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
-40 to +125
0 to +70
0 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.02

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)

Applications/Uses

  • Automotive
  • Fire/Smoke Alarms
  • Home Security
  • Industrial
  • Telecom/Networking

Description

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.

Simplified Block Diagram

MAX5023, MAX5024: Typical Operating Circuit MAX5023, MAX5024: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.