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uA78S40 datasheet,pdf,Universal Switching Regulator Subsystem
The mA78S40 is a switching regulator subsystem, consisTIng of atemperature compensated voltage reference, controlled–duty cycleoscillator with an acTIve current limit circuit, comparator, high–currentand high–voltage output switch, capable of 1.5 A and 40 V, pinned–outpower diode and an uncommitted operaTIonal amplifier, which can bepowered up or down independent of the IC supply. The switchingoutput can drive external NPN or PNP transistors when voltagesgreater the 40 V, or currents in excess of 1.5 A, are required. Some ofthe features are wide–supply voltage range, low standby current, highefficiency and low drift. The mA78S40 is available in commercial(0° to + 70°C), and automoTIve (–40° to + 85°C) temperature ranges.
