SPX1086U-2.5 datasheet(4/7 Pages) SIPEX

Part #	SPX1086U-2.5

Description	1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response

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Manufacturer	SIPEX [Sipex Corporation]

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4 / 7 page

Rev. 11/2/00

SPX1086

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.

SPX1086

Fig.2 Basic Adjustable Regulator

VOUT

V IN

VREF

R1

R2

V

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

I

ADJ

50µA

SPX1086

Fig.3 Basic Adjustable Regulator

V

IN

R2

R1

Connect R

2 to Load

RL

Connect R

1 to

Case of Regulator

R

P Parasitic Line

Resistance

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SPX1086U-2.5 Datasheet(PDF) 4 Page - Sipex Corporation

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