SPX1084 Просмотр технического описания (PDF) - Signal Processing Technologies

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производитель

SPX1084

5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response

Signal Processing Technologies 

Basic Adjustable Regulator

SPX1084

VIN

SPX1084

VREF

I

ADJ

50µA

VOUT = VREF * ( 1 + R2/R1) + IADJ * R2

VOUT

R1

R2

Fig.2 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.

RP Parasitic Line

Resistance

VIN

SPX1084

Connect R 1 to

Case of Regulator

R1

RL

R2

Connect R 2 to Load

Fig.3 Basic Adjustable Regulator

Rev. 10/23/00

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