# Protection For Voltage Regulators

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People often forget that many voltage regulator ICs have an upper limit (usually 35 V) on the input voltage they can handle. That applies primarily to types with a fixed output voltage. Adjustable voltage regulators also have a maximum voltage specification, in that case between the input and output (commonly… Read more »

# 78xx Voltage Regulators

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The voltage regulators from the 78xx-series are found in many analogue power supplies. It seems, then, somewhat superﬂuous to say much more about them. But on the other hand, it can be very useful to highlight the important points, just because they are so ubiquitous. The 78xx is almost always… Read more »

# Ampere or Current Booster Circuit

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Small and very useful circuit, Can be built on a veroboard Volt regulators such as the LM708, and LM317 series (and others) sometimes need to provide a little bit more current then they actually can handle. If that is the case, this little circuit can help out. A power transistor… Read more »

# 12V to 6V Converter Circuit with 7805

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In this schematic is presented a simple 12 Volts to 6 volts converter circuit that is built with the well-known 7805 voltage regulator or the LM309 IC. You can use 7806 as well, but this circuit comes in handy when you do not have a spare 7806. Schematic of the… Read more »

# Switching Voltage Regulators

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Switching Voltage Regulators All of the voltage regulators we have discussed so far are series regulators, also sometimes called the linear regulators because the pass transistor used in such a regulator operates in the active region. Series regulators are very popular and meet many of our needs. The main drawback… Read more »

# Switching Regulator using LM1758 A

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LM1578A Switching Voltage Regulator The National Semiconductor LM 1578 A is a switching regulator which can easily be set up for such dc-to-dc voltage .conversion circuits as the buck, boost, and inverting configurations. The LM 1578 A features a unique comparator input stage which not only has separate pins for… Read more »

# Switching Regulators Using LM 2575 and LM 2577

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Switching Regulators Using LM 2575 and LM 2577 Switching regulators are available is different circuit configurations including the flyback, feed-forward, push-pull, and non-isolated single-ended or single-polarity types. Also, the switching regulators can operate in any of three modes : step-down, step-up, or polarity inverting. LM2575 switching regulator LM 2575 series… Read more »

# LM340 Series Voltage Regulators

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Three terminal voltage regulators 3 terminal ic voltage regulator This series is typical of the three-terminal voltage regulators. The block diagram is shown in figure. The built-in reference voltage VREF drives the non-inverting input of an op-amp. The operational amplifier consists of several stages of voltage gain. Because of the… Read more »

# IC Voltage Regulators

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IC voltage regulators are versatile and relatively inexpensive and are available with features such as a programmable output, current-voltage boosting, internal short-circuit current limiting, thermal shutdown, and floating operation for high voltage applications-Voltage regulators comprise a class of widely employed ICs. Regulator IC units contain the circuitry for reference source,… Read more »

# IC 723 Voltage Regulators

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IC 723 Voltage Regulator Figure shows the basic circuit of an IC 723 voltage regulator. This IC has a voltage reference source, an error amplifier, a series pass transistor, and a current limiting transistor all contained in one small package. The device can be connected to operate as a positive… Read more »