The new series of the tsr 1 step down switch regulator are predestined to replace the ineffective 78xx linear regulators the extremely high degree of efficiency of up to 96 enables the operation at full load up to 60 c ambient temperature without using a heat sink or forced air cooling the tsr 1 regulators also fulfil other essential features of linear regulators high output accuracy 2 low standby current of 2 ma and do not need any external condensers the high degree of efficiency