In order to generate a negative output voltage from a positive input voltage, the designer would usually opt for the buck-boost topology or possibly a SEPIC converter, both of which offer reasonable efficiency that is much higher than a linear regulator. However, the same outcome can be reached with a buck converter.
For this example configuration, the input signal is intentionally driven very close to the full-scale input range for the ADC. This circuit uses a switched capacitor inverter to generate a negative supply voltage with a positive input supply voltage. Doing this inversion generates power-supply ripple and noise.
The supplier’s Application Note 782 3 illustrates a negative voltage inverter using the MAX1681. Another Application Note (3659 4) from Maxim presents a charge pump converter circuit that produces -10 V at no load with more than 200 mA from +5-V input. The charge pump IC used in this circuit is MAX889 as shown in Figure 4.
However, some specific electronic circuits require power sources with the negative voltage at the output side. The inverting switching converter is a DC/DC converter type that enables the supply of negative voltage. Most basic DC/DC converter topologies can be modified to function as inverting converters.
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In order to generate a negative output voltage from a positive input voltage, the designer would usually opt for the buck-boost topology or possibly a SEPIC converter, both of …
Table 1: Minimum inverter requirements. Now, to convert a synchronous buck regulator (Figure 1) into an inverter with negative output voltage, TI suggests that the inductor …
DC-DC Polarity Inverter : This circuit generates a negative polarity voltage from a positive polarity one. This is useful for OP-amp circuits and low power audio amps where you need …
For negative output applications, the Run voltage must be level-shifted to properly turn off the part. Using just a single PNP transis-tor and a few resistors, level-shifting can be …
It is common for Internet of Things (IoT) devices, industrial sensors, meters, precision, and medical equipment to require both a positive and negative voltage. Often, these …
by Bill Andreycak Developing a low power negative supply voltage from a positive input supply can be accomplished using some very common PWM control ICs. Typical …
The aim of the inverter design is to suggest a simple 4-level multilevel inverter structure with significant features such as minimum number of power components, high quality …
This circuit uses a switched capacitor inverter to generate a negative supply voltage with a positive input supply voltage. Doing this inversion generates power-supply ripple …
A negative voltage reference can be generated using a series voltage reference with an inverting amplifier. The MAX6010 series voltage reference used with the MAX9820 …
Now, to convert a synchronous buck regulator (Figure 1) into an inverter with negative output voltage, TI suggests that the inductor and the output capacitor be kept in the …
DC-DC Polarity Inverter : This circuit generates a negative polarity voltage from a positive polarity one. This is useful for OP-amp circuits and low power audio amps where you need …
GENERAL DESCRIPTION The SGM3207 generates an unregulated negative output voltage from an input voltage ranging from 1.4V to 5.5V. The device is typically supplied …
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