Low drop out voltage regulator

EMIF06-SD03F3

18/23

Doc ID 15194 Rev 2

5.2

Load regulation and transient load regulation

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

the voltage controllor

current

value to be observed during load variation.

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

pulsed load and are to be taken into account separately.

the measurement of the load transient response.

Figure 14.

Load regulation and transient load regulation

Time

trise = ttr

tfall = ttr

Vrise

LdR

Time

Vfall

Static and dynamic load regulation

IoutL

IoutH

Load Regulation: LdR=f(IoutH,IoutL)

Load Transient:

LdTr = MAX( Vrise, Vfall) –LdR(IoutH,IoutL)

Iout

Vout

X: 50µs/div

Y: 50mA/div

X: 50µs/div

Y: 10mV/div

Iout

Vccb

Transient load regulation measurement

(typical values at 25° C)

Temperature ( °c)

0

10

20

30

40

50

60

-10

25

85

LdR (mV)

LdTr (mV)

Load regulation (LdR) and Load transient (LdTr)

versus temperature (typical values