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MAX5023_ASA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5023_ASA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 13 page General 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 with- stand 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 regu- lator, the MAX5023/MAX5024 include a HOLD input that allows for the implementation of a self-holding circuit without requiring external components. Setting HOLD low after enabling the regulator, forces the regu- lator to remain on even if EN is subsequently set low. Releasing 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 regu- lator’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 package. Applications Automotive Fire/Smoke Alarms Industrial Telecom/Networking Home Security Features o Wide Operating Input Voltage Range +6.5V to +65V o Thermally Enhanced 8-Pin SO Package Dissipates 1.5W o Guaranteed 150mA Output Current o 60µA No-Load Supply Current o -60V Reverse-Battery Protection o Preset +3.3V or +5.0V Output Voltage o Thermal and Short-Circuit Protection o Operate Over -40°C to +125°C Temperature Range o Integrated µP Reset Circuit o Watchdog Timer with 1.6s Timeout Period (MAX5023) o Regulator Enable and Hold Inputs Implement Self-Holding Circuit o SET Input for Adjustable Output Voltage (MAX5024) 65V, Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer ________________________________________________________________ Maxim Integrated Products 1 N.C. HOLD RESET 1 2 8 7 OUT WDI EN GND IN SO TOP VIEW 3 4 6 5 MAX5023 N.C. HOLD RESET 1 2 8 7 OUT SET EN GND IN SO 3 4 6 5 MAX5024 PART TEMP RANGE PIN-PACKAGE MAX5023 _ ASA -40°C to +125°C 8 SO MAX5024 _ ASA -40°C to +125°C 8 SO Pin Configurations Ordering Information 19-2619; Rev 0; 10/02 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Selector Guide and Typical Operating Circuit appear at end of data sheet. Note: These parts offer a choice of reset thresholds, reset threshold tolerances, and regulator output voltages. From the Selector Guide, insert the desired suffix letter into the blank to complete the part number. |
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