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Exam 22: Regulated Power Supplies Key

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Question 21

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What is the term used to indicate that a chip turns itself off when the internal temperature becomes too high?

A) saturation temperature
B) chip overheat
C) thermal shutdown
D) cutoff temperature

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Question 22

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What is the term that means each circuit board has its own three-terminal regulator to supply the voltage used by components on that circuit board?

A) on-card regulation
B) line regulation
C) load regulation
D) single regulation

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Question 23

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A switching regulator can hold the output voltage constant under varying line and load conditions by

By using a voltage regulator between the power supply and the load,line and load regulation can be improved significantly.

A switching regulator is the most efficient of all voltage regulators with full-load efficiency from about 75 to more than 95 percent.

Thermal shutdown means an IC regulator will shut itself off when the internal temperature drops below a certain level.

Which of the following is the most efficient voltage regulator?

Dc-to-dc converters are usually called

Dc-to dc converters have efficiencies that range from

The term that expresses how much the load voltage changes when the load current changes is the

Current-sensing resistors used in series regulator circuits are typically

A zener diode is what type regulator?

The two types of linear regulators are the shunt type and the series type.

Load regulation indicates how much the line voltage changes when the load changes.

How does using an outboard transistor affect the efficiency of a series regulator?

The headroom voltage is defined as the difference between the input and output voltage.

An advantage of shunt regulators is that they have built-in short-circuit protection.

With the shunt type linear regulator,the regulating device is in series with the load.

To protect against an accidental short,a series regulator usually includes

A simple voltage regulator can be built with a zener diode.