Archive for the ‘loadregulation’ tag

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August 23, 2011
regulator you use , when the regulator parameters for which you cigarette caseare aware of it? For example, low-dropout linear regulator of the main parameters, then you know it? If you are unsure, it can follow us together under:
1. Output voltage (OutputVoltage)
output voltage is low dropout linear regulator of the most important parameters, but also the use of electronic equipment designers should be considerbest electronic cigaretteed first when the regulator parameters. Low dropout linear regulator with fixed output voltage and adjustable output voltage of two types. Fixed output voltage regulators use more convenient, and because the output voltage is adjusted through the factory precision, so the regulator high precision. But the value of output voltage setting voltage values ??are used, it is impossible to meet all application requirements, but the external component value changes will affect the stability and accuracy.
2. Maximum output current (MaximumOutputCurrent)
different electrical power equipment, requiring the maximum regulator output current is not the same. In general, the greater the voltage regulator output current higher cost. To reduce costs, only the regulator in a multi-component supply system, should be based on the current value of each part required to select the appropriate regulator.
3. Dropout Voltage (DropoutVoltage)
input-output voltage differential is low dropout linear regulator of the most important parameters. The output voltage to ensure stable conditions, the lower the dropout voltage linear regulator performance, the better. For example, 5.0V low dropout linear regulator, as long as the input voltage of 5.5V, the output voltage can be stabilized at 5.0V.
4. Ground current (GroundPinCurrent) pdqian3
IGND ground circuit in the series refers to the output current is zero, provided the regulator input supply current. The current is sometimes referred to as quiescent current, but the use of PNcircuit city P transistors for the series pass element, the name for this habit is not correct. Usually the preferred LDO ground current is small.
5. Load Regulation (LoadRegulation)
load regulation can be 2-1 and 2-1 to define the type, LDO load regulation is smaller, the LDO ability to suppress interference, the stronger the load.
6. Line regulation (LineRegulation)
Line regulation can be defined, LDO linear adjustment of the rate the smaller the input voltage the smaller the impact on the output voltage, LDO better the performance.
7. Power supply rejection ratio (PSRR)
LDO input is often the source of many interfering signals present. PSRR LDO for reflecting the suppression of these interference signals.
regulator for which the main parameters, said that so far, and tomorrow we will continue to provide the knowledge of other regulators.
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