LT1086220M05

^VIN              Input Voltage *                                                                                                 30V
^PD              Power Dissipation                                                                                           Internally limited
^VIN             Operating Input Voltage                                       Adjustable                           25V
                                                                                            5 Volt                                  20V
                                                                                           12 Volt                                 25V

The LT1086 is designed to provide 1.5A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input to output differential and the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents.On-chip trimming adjusts the reference output voltage to 1%. Current limit is also trimmed, minimising the stress on both the regulator and power source circuitry under overload conditions.

The LT1086 is pin compatible with older 3 terminal adjustable regulators. A 10mF output capacitor is required on these new devices; however, this is usually included in most regulator designs. Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1086 quiescent current flows into the load, increasing efficiency.