MAX5023/MAX5024 65V, Low-Quiescent-Current, High-Voltage Linear Regulators with P Reset and Watchdog Timer General Description Features The MAX5023/MAX5024 high-voltage linear regulators Wide Operating Input Voltage Range +6.5V to +65V operate from a +6.5V to +65V input voltage and deliver up Thermally Enhanced 8-Pin SO Package with to 150mA of output current. These devices consume only Exposed Pad Dissipates 1.5W 60A of quiescent current with no load and withstand a Guaranteed 150mA Output Current -60V reverse-battery voltage at the input. The MAX5023/ MAX5024 include an active-low internal microprocessor 60A No-Load Supply Current (P) reset circuit that asserts when the regulator output -60V Reverse-Battery Protection drops below the preset output voltage threshold by 7.5% or Preset +3.3V or +5.0V Output Voltage 12.5%, depending on the device selected. Both devices are available with a fixed +3.3V or +5V output. These devices Thermal and Short-Circuit Protection are short-circuit protected and include thermal shutdown. Operate Over -40C to +125C Temperature Range In addition to an enable input to turn on or off the regula- Integrated P Reset Circuit tor, the MAX5023/MAX5024 include a HOLD input that allows for the implementation of a self-holding circuit Watchdog Timer with 1.6s Timeout Period without requiring external components. Setting HOLD low (MAX5023) after enabling the regulator, forces the regulator to remain Regulator Enable and Hold Inputs Implement Self- on even if EN is subsequently set low. Releasing HOLD Holding Circuit shuts down the regulator. SET Input for Adjustable Output Voltage (MAX5024) The MAX5023 includes a watchdog input that monitors a pulse train from the P and generates reset pulses if the Selector Guide and Ordering Information appear at end of watchdog input remains high or low for a duration longer data sheet. 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/ Typical Operating Circuit MAX5024T) or +5V (MAX5024L/MAX5024M). Set the adjustable output voltage by connecting SET to the regulators output through a resistive-divider network. +6.5V TO +65V V IN OUT CC The MAX5023/MAX5024 operate over the automotive 10F 15F temperature range (-40C to +125C) and are available in a P MAX5023 thermally enhanced, surface-mount 8-pin SO-EP package. 10k Applications RESET RESET Automotive ON OFF EN Industrial WDI I/O Home Security I/O HOLD Fire/Smoke Alarms GND Telecom/Networking 19-2619 Rev 8 3/16 IGNITION SWITCHMAX5023/MAX5024 65V, Low-Quiescent-Current, High-Voltage Linear Regulators with P Reset and Watchdog Timer Absolute Maximum Ratings IN to GND ...............................................................-60V to +70V Continuous Power Dissipation (T = +70C) A EN to GND .................................................-0.3V to (V + 0.3V) 8-Pin SO-EP (derate 19.2mW/C above +70C) .......1538mW IN HOLD to GND ........................................-0.3V to (V + 0.3V) Operating Temperature Range ......................... -40C to +125C OUT SET, WDI, OUT to GND .....................................-0.3V to +13.2V Junction Temperature ......................................................+150C RESET to GND (Open Drain) ............................-0.3V to +13.2V Storage Temperature Range ............................ -65C to +150C Short-Circuit Duration (V +14V) ..........................Continuous Lead Temperature (soldering, 10s) .................................+300C IN Maximum Current to Any Pin (Except IN, OUT) ..............20mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. (Note 1) Package Thermal Characteristics SO-EP Junction-to-Ambient Thermal Resistance ( ) ...........41C/W JA Junction-to-Case Thermal Resistance ( )..................2C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = +14V, I = 1mA, C = 10F, C = 15F, V = +2.4V, HOLD = open, 10k from RESET to OUT, T = -40C to +125C, IN OUT IN OUT EN A unless otherwise noted. Typical specifications are at T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V V must be at least 1.5V greater than V 6.5 65 V IN IN OUT Reverse Input Current I V = -60V 0.1 10 A REVERSE IN I = 0mA 58 140 OUT Supply Current I Measured at GND A Q I = 150mA 2000 OUT Shutdown Supply Current I V +0.4V 6 16 A SHDN EN REGULATOR Guaranteed Output Current I V = +5V 150 mA OUT OUT SET = GND, I = 1mA to 150mA, OUT 4.8 5 5.2 5V version Output Voltage V SET = GND, I = 1mA to 150mA, V OUT OUT 3.168 3.3 3.432 3.3V version I = 5mA, adjustable version (MAX5024) 2.5 11 OUT Dropout Voltage V I = 150mA, V = +5V (Note 3) 0.9 1.5 V DO LOAD OUT Rising edge of V to V , R = 500, IN OUT L Startup Response Time 400 s SET = GND +5V version -1 +1 V / OUT Line Regulation +8V V +65V mV/V IN V IN +3.3V version -0.5 0.5 Maxim Integrated 2 www.maximintegrated.com