Datasheet

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ESR1
ESR2
ESR3
3
1
2
I
OUT
V
OUT
t
1
t
2
TPS70845, TPS70848
TPS70851, TPS70858
TPS70802
SLVS301D – JUNE 2000 – REVISED DECEMBER 2007
Figure 39. Correlation of Different ESRs and Their Influence on the Regulation of V
O
at a Load Step from
Low-to-High Output Current
Figure 39 also shows the impact of different ESRs on the output voltage. The left brackets show different levels
of ESRs where number 1 displays the lowest and number 3 displays the highest ESR.
From above, the following conclusions can be drawn:
• The higher the ESR, the larger the droop at the beginning of load transient.
• The smaller the output capacitor, the faster the discharge time and the greater the voltage droop during the
LDO response period.
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