SPX1085AT datasheet(4/7 Pages) SIPEX

Nome de Peças	SPX1085AT

Descrição Electrónicos	3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response

PDF	7 Pages

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Fabricante Electrônico	SIPEX [Sipex Corporation]

Página de início	http://www.sipex.com

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4 / 7 page

Rev. 10/30/00

SPX1085

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.

SPX1085

Fig.2 Basic Adjustable Regulator

OUT

VREF

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

ADJ

50µA

SPX1085

Fig.3 Basic Adjustable Regulator

Connect R

2 to Load

Connect R

1 to

Case of Regulator

P Parasitic Line

Resistance

SPX1085AT Folha de dados(PDF) 4 Page - Sipex Corporation