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MAX6768 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6768 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 22 page General Description The MAX6765–MAX6774B are low-quiescent-current, high-voltage linear regulators that operate from 4V to 72V and deliver up to 100mA of load current. These low- power devices consume only 31µA of quiescent current, making them ideal for always-on automotive modules. These devices are offered with fixed standard output options of 5.0V, 3.3V, 2.5V, and 1.8V, or can be adjusted from 1.8V to 11V with two external resistors. The MAX6765–MAX6774B feature a push-pull or open- drain, active-low RESET output with either fixed or adjustable thresholds. Whenever the regulator’s output falls below the reset threshold, the RESET output asserts and remains asserted for at least the minimum reset timeout period after the output voltage exceeds its threshold. The minimum reset timeout period is offered with fixed values from 75µs to 200ms or can be adjusted externally with a small capacitor. These devices provide three regulator enable modes to accommodate several power-on schemes. The MAX6765/MAX6766/MAX6769/MAX6770/MAX6773/ MAX6773B/MAX6774/MAX6774B feature a single tradi- tional enable input (ENABLE) to turn on and off the regula- tor. The MAX6771/MAX6772 provide dual enable inputs (ENABLE1 and ENABLE2) to turn on and off the regulator either through an ignition switch or a bus transceiver. The MAX6767/MAX6768 provide a hold input (HOLD) in addi- tion to the enable input to allow for the implementation of a self-holding circuit without requiring external components. Setting HOLD low after enabling the regulator forces the regulator to remain on even if ENABLE is subsequently set low. Releasing HOLD shuts down the regulator. The MAX6773/MAX6773B/MAX6774/MAX6774B also include a watchdog input that monitors a pulse train from the microprocessor (µP) and generates a reset pulse if the watchdog input remains high or low for a duration longer than the 1.6s (typ) (MAX6773/MAX6774) or 50ms (typ) (MAX6773B/MAX6774B) watchdog timeout period. The MAX6765–MAX6774B are available in a small, ther- mally enhanced 3mm x 3mm TDFN package that can dissipate up to 1.951W, thereby supporting continuous regulator operation during high ambient temperatures, high battery voltage, and high load-current conditions. The MAX6765–MAX6774B are fully specified for a -40°C to +125°C operating temperature range. Applications Automotive Industrial Telecom Features o Low 31µA Quiescent Current o 4V to 72V Wide Input Voltage Range o 100mA Output Current Capability o Dropout Voltage of 620mV with 5V Output at 100mA o Fixed Output-Voltage Options: 5V, 3.3V, 2.5V, and 1.8V o Watchdog Timer Option (1.6s (MAX6773/ MAX6774) and 50ms (MAX6773B/MAX6774B)) o Adjustable Output Voltages from 1.8V to 11V o Open-Drain or Push-Pull RESET Output o Fixed or Capacitor-Adjustable Reset Timeouts o Small, Thermally Enhanced 1.9W, 3mm x 3mm TDFN Package o Overtemperature and Short-Circuit Protection o Fully Specified from -40°C to +125°C Automotive Micropower Linear Regulators with Supervisor ________________________________________________________________ Maxim Integrated Products 1 1 + 23 EP 654 MAX6765 MAX6766 TDFN TOP VIEW PART TEMP RANGE PIN- PACKAGE MAX6765TT_D_+ -40°C to +125°C 6 TDFN-EP* MAX6765TT_D_/V+ -40°C to +125°C 6 TDFN-EP* Pin Configurations Ordering Information 19-0657; Rev 5; 10/11 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Ordering Information continued at end of data sheet. Typical Application Circuit and Selector Guide appear at end of data sheet. Pin Configurations continued at end of data sheet. EVALUATION KIT AVAILABLE The first “_” is a placeholder for the voltage output and reset threshold. The 2nd “_” designates the fixed reset-timeout option. See Tables 1 and 2 for details. For example, the MAX6765TTLD4 has a 5V output, a reset threshold of 4.65V, and a 200ms typical reset timeout. + Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. * EP = Exposed pad. For tape-and-reel orders add a “T” after the “+” symbol to com- plete the part number. Tape-and-reel orders are available in 2.5k increments. Nonstandard versions require a 10k minimum order quantity. |
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