Linear Regulators Suit Automotive Applications

Jan 3, 2007 10:50 AM

Maxim Integrated Products’ IC series MAX6765 to MAX6774 are high-voltage, low-power linear regulators that deliver up to 100 mA of output current. These low-power devices operate from 4 V to 72 V and consume only 31 μA of quiescent current, making them suitable for always-on applications such as automotive modules.

The MAX6765 to MAX6774 are offered with a 1.5%-accurate, fixed-output voltage of 5.0 V, 3.3 V, 2.5 V, or 1.8 V. Additionally, two external resistors enable the output voltage to be adjusted from 1.8 V to 11 V. Each device offers an internal reset circuit that asserts whenever the monitored output voltage falls below its respective threshold. When the output voltage exceeds its reset threshold, the device de-asserts after the reset timeout period.

Available reset timeout intervals are offered as fixed values of 75 μs, 3 ms, 12.5 ms, 50 ms, or 200 ms or can be adjusted externally with a capacitor. The MAX6765/MAX6767/MAX6769/ MAX6771/MAX6773 are offered with an open-drain reset output, while the MAX6766/MAX6768/MAX6770/ MAX6772/MAX6774 have a push-pull reset output.

These linear regulators also offer an enable and hold circuit (MAX6767/MAX6768), an adjustable reset input (MAX6769/MAX6770), dual enable inputs (MAX6771/MAX6772), and a watchdog timer (MAX6773/MAX6774). Additionally, all of these devices provide thermal and short-circuit protection. The series is offered in a space-saving, thermally enhanced, 3-mm x 3-mm TDFN package and are fully specified from -40°C to +125°C. Prices start at $0.86 in 1000-piece quantities.