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SPX1587 Fiches technique(PDF) 4 Page - Sipex Corporation |
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SPX1587 Fiches technique(HTML) 4 Page - Sipex Corporation |
4 / 7 page Rev. 10/30/00 SPX1587 Basic Adjustable Regulator Output Voltage Consider Figure 2. The resistance R1 generates a constant current flow, normally the specified load current of 10mA. This current will go through the resistance R2 to set the overall output voltage. The current IADJ is very small and constant. Therefore its contribution to the overall output voltage is very small and can generally be ignored. Load Regulation Parasitic line resistance can degrade load regulation. In order not to affect the behavior of the regulator, it is best to connect directly the R1 resistance from the resistor divider to the case, and not to the load. For the same reason, it is best to connect the resistor R2 to the Negative side of the load. Output Voltage The fixed voltage LDO voltage regulators are simple to use regulators since the VOUT is preset to the specifications. It is important however, to provide the proper output capacitance for stability and improvement. For most operating conditions a capacitance of 22uF tantalum or 100uF electrolytic will ensure stability and prevent oscillation. SPX1587 Fig.2 Basic Adjustable Regulator VOUT V IN V REF R1 R2 V OUT = VREF * ( 1 + R2/R1) + IADJ * R2 I ADJ 50µA SPX1587 Fig.3 Basic Adjustable Regulator V IN R 2 R 1 Connect R 2 to Load R L Connect R 1 to Case of Regulator R P Parasitic Line Resistance SPX1587 Basic Fixed Regulator V IN V OUT 5V C1 10uF C2 10uF 3.3V |
Numéro de pièce similaire - SPX1587 |
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Description similaire - SPX1587 |
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