Ultra-Low-Ripple DC/DC Boost Converter with TPS60100

DC/DC step-up converter is applicable on battery-powered equipment. DC/DC step-up converter can be used to generate supply voltages for internal circuits that require higher voltages than the available battery voltage. There’s two kind of converters, inductive and capacitive. Inductive step-up converters have a high efficiency over the entire input voltage range. Capacitive converters-i.e., charge pumps give us a high efficiency […]

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Switch Mode Regulator Provides -12V Negative Supply from Positive Supply

This is a circuit that can provide -12 V negative supply from positive supply. The output voltage is Vo= -Vin· D/(1-D). The maximum output current is Iout=1·(1-D). Here is the circuit : In this circuit, the ground of U1 is connected to negative output voltage. The input voltage of U1 must be lower than maximum operating input voltage, 36V, because […]

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Buck-Boost (Switch Mode) Regulator Provides 12V from 5-35V Supply

This is positive buck-boost regulator circuit. Using this circuit, we can implement a step-down/up converter with a positive output voltage. This circuit produces an output voltage of 12 V. Here is the circuit : This circuit requieres input voltage between 5 V and 35V. The output voltage is given by Vo=Vin·D/(1-D).  The maximum output current is Iout=1x(1-D). The term (1-D) […]

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