These three terminal positive fixed voltage regulators in surface mount packages are designed to provide 7.5A, 5A, 3A, and 1.5A with higher efficiency than conventional voltage regulators. These devices are designed to operate to 1 Volt input to output differential and the dropout voltage is specified as a function of load current. These devices are ideally suited for Hi-Rel applications where surface mount, small size, hermeticity and high reliability are required.