Maxim Integrated Products has introduced the MAX15006/MAX15007, high-voltage, low-dropout (LDO) linear regulators for “always-on” automotive applications such as remote keyless entry (RKE), receiver modules for tire pressure monitoring, and power-supply modules for "keep-alive" circuits.

Both devices offer 90 µA typical quiescent current with a 50 mA load and 10 µA at no load. The MAX15007 draws just 3 µA in shutdown. The devices can operate from a cold-crank voltage as low as 4 V and withstand load-dump transients as high as 45 V. Both deliver up to 50 mA of output current. The MAX15006/MAX15007 both include short-circuit protection. The output of each regulator can be shorted to ground for an indefinite duration even with an input voltage as high as 40 V.

Both devices include thermal shutdown to protect them from excessive temperatures at the die. The MAX15006/MAX15007 are specified for operation over the -40 °C to +125 °C and are available in 3.3 V or 5 V output versions. They are packaged in a 3 mm x 3 mm, thermally enhanced 6-pin TDFN or a thermally enhanced 8-pin SO with 1.9 W and 1.86 W dissipation respectively at an ambient temperature of 70 °C. A data sheet is available at www.maxim-ic.com/MAX15006.