EMIF06-SD03F3 datasheet(17/23 Pages) STMICROELECTRONICS

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EMIF06-SD03F3

Low drop out voltage regulator

Doc ID 15194 Rev 2

17/23

5.1

Line regulation and transient line regulation

The line regulation (LiR) is a static variable that indicates the change in the output voltage of

the voltage controller

ΔVout (at constant load) when there is a change ΔVbat at the input

voltage. By contrast the line transient response (LiTr) represents dynamic peak value to be

observed during the change in input voltage

Thermal effects due to changes in the junction temperature are circumvented with pulsed

voltage during the test and are to be taken into account separately.

The figure shows the boundary conditions for trise, tfall, and ΔVbat to be taken as the basis of

the measurement of the line transient response without additional decoupling of the supply

voltage by a buffer capacity Cbat. The values defined in the specification apply, however,

only in the case of decoupling of the supply voltage with such a capacity Cbat, as a result of

which the values for trise and tfall are influenced to some extent.

Figure 13.

Line regulation and transient line regulation

Time

tfall = ttr

trise = ttr

Vrise

LiR

Time

Line Regulation: LiR=f(VbatH,VbatL)

Line Transient:

LiTr = MAX(

Vfall

Static and dynamic line regulation

VbatL

VbatH

Vbat

Vout

Vrise, Vfall) –LiR(VbatH,VbatL)

3.4 V

Vbat

X: 0.2 ms/div

Y: 100 mV/div

X: 0.2 ms/div

Y: 4 mV/div

Vout

Transient line regulation measurement

Typcial values at 25° C

Temperature ( °c)

-10

LiR (mV)

LiTr (mV)

Line regulation (LiR) and Line transient (LiTr)

versus temperature (typical values

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