LM4040C20ILPR datasheet(28/51 Pages) TI

Il numero della parte	LM4040C20ILPR

Spiegazioni elettronici	PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE

PDF	51 Pages

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Produttore elettronici	TI [Texas Instruments]

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Cathode and Load Currents

* VZ

) IZ)

(1)

LM4040

IZ + IL

LM4040

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE

SLOS456K – JANUARY 2005 – REVISED MARCH 2008

In a typical shunt-regulator configuration (see Figure 9), an external resistor, RS, is connected between the

supply and the cathode of the LM4040. RS must be set properly, as it sets the total current available to supply

the load (IL) and bias the LM4040 (IZ). In all cases, IZ must stay within a specified range for proper operation of

the reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum IL

and minimum VS), RS must be small enough to supply the minimum IZ required for operation of the regulator, as

given by data-sheet parameters. At the other extreme, maximum VS and minimum IL, RS must be large enough

to limit IZ to less than its maximum-rated value of 15 mA.

RS is calculated according to Equation 1:

Figure 9. Shunt Regulator

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LM4040C20ILPR Scheda tecnica(PDF) 28 Page - Texas Instruments