78xx Replacement (SD8942) Replace your old 78xx voltage regulators with this much more efficient pin-compatible buck converter. Parameter Value Input Voltage 4.5V - 16V Output Voltage Selectable via Resistors R1 and R2: V = 0.6 * (R1 / R2 + 1) Output Current max 2A Output Voltage R1 R2 12.2V 91kΩ 4.7kΩ 12V 82kΩ 4.3kΩ 9.2V 43kΩ 3kΩ 9V 140kΩ 10kΩ 6.2V 140kΩ 15kΩ 6V 102kΩ 11.3kΩ 5.3V 100kΩ 13kΩ 5.2V 115kΩ 15kΩ 5.1V 75kΩ 10kΩ 5V 110kΩ 15kΩ 3.5V 107kΩ 22.1kΩ 3.4V 56kΩ 12kΩ 3.3V 115kΩ 25.5kΩ SD8942 Datasheet MT2492 Datasheet L78S Datasheet TI Voltage Divider Calculator