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FAQ : LDO Linear Regulators

How should I calculate the external divider resistors’ value when I set the output voltage of an output voltage of adjustable type LDO?

What must be taken into account if CE pin is tied to VDD pin? Is it necessary to pull up CE pin to VDD pin by a resistor?

What will happen if the output voltage becomes higher than the input voltage? How can I take measures against the state?

Do Ψjt, θja, and power dissipation vary by the size of the board? How can I predict the power dissipation, the Ψjt, and the θja of the board we have designed?

What are the characteristics of a negative voltage LDO regulator? Where is it used?

What is a voltage tracker? How is it used?

What is load regulation? What is the difference between load transient response and load regulation?

How can I figure out the efficiency of an LDO regulator?

What is line regulation? How can I calculate the output voltage change by considering the line regulation?

What is the meaning of Dropout Voltage in the specifications of an LDO regulator? In what way can LDO regulators with low dropout voltage be used?

What is the supply current of an LDO regulator? What are the merits and demerits of using an LDO regulator with low supply current?

What is the difference between LDO's standby current and supply current? How much voltage does an LDO regulator output at its standby mode?

How can I calculate the power dissipation of an LDO regulator?

What is a fold-back protection circuit?

What is an ECO function?

What does externally adjustable output voltage mean?

What is an auto-discharge function?

What is an inrush current preventing circuit?

What is a reverse current protection circuit?

What is a thermal shutdown circuit?

What will happen if the input voltage becomes lower than the output voltage?

What is a constant slope circuit?

How should external components be located on a PCB?

Are LDO regulators damaged by inrush current over their absolute maximum ratings?

What must be taken into account to lay out PCB?

How should I select an equivalent series resistor?

At what point is a source voltage applied to a CE pin?

What must be taken into account to construct a phase compensation circuit?

What is the difference between DC/DC converters and LDO regulators?

What will happen if the CE is at high impedance?

How can I calculate the dropout voltage of an LDO regulator?

What does "Output Current min." on datasheets mean?

How can I make full advantage of the auto-discharge function?

What is the alternative product for RE5RA series?