External Capacitor Requirements – ESR
3-9
Circuit Design
Figure 3–6. Correlation of Different ESRs and Their Influence to the Regulation of V
out
at a
Load Step From Low to High Output Current
ESR 1
ESR 2
ESR 3
3
1
2
tL
t1
t2
Iout
Vout
In order to get a good performing system, an LDO with short response time and
an output capacitor with low ESR are required.
For any regulator of the TPS76xxx/TPS770xx series, an output capacitor of
at least 4.7
µ
F is required. The ESR of the capacitor should be between 0.5
Ω
and 3
Ω
to ensure stability.
Содержание TPS76933
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