Datasheet

Output Voltage
20 mV/Div, AC
Input Voltage
500 mV/Div, DC
Timebase - 2 ms/Div
Output Voltage
50 mV/Div, AC
Output Current
500 mA/Div, DC
Timebase - 2 ms/Div
Inductor Current
200 mA/Div, DC
Output Voltage
50 mV/Div, AC
Timebase - 200 ms/Div
Inductor Current
200 mA/Div
Output Voltage
20 mV/Div
Timebase - 1 ms/Div
A
REG
+
d
V
FB
+
5 (R3 ) R4)
R4 (1 ) i w 2.3 ms)
TPS61030 , TPS61031 , TPS61032
www.ti.com SLUS534G –SEPTEMBER 2002–REVISED MARCH 2015
11.2.2.4.2.1 Small Signal Stability
When using output capacitors with lower ESR, like ceramics, it is recommended to use the adjustable voltage
version. The missing ESR can be easily compensated there in the feedback divider. Typically a capacitor in the
range of 10 pF in parallel to R3 helps to obtain small signal stability with lowest ESR output capacitors. For more
detailed analysis the small signal transfer function of the error amplifier and regulator, which is given in Equation
8, can be used.
(8)
11.2.3 Application Curves
V
I
= 3.3 V R
L
= 5 Ω
V
I
= 3.3 V R
L
= 100 Ω
Figure 14. TPS61030 Output Voltage in Continuous Mode
Figure 15. TPS61030 Output Voltage in Power Save Mode
V
I
= 2.5 V I
L
= 80 mA to 800 mA
V
I
= 2.2 V to 2.7 V R
L
= 50 Ω
Figure 16. TPS61030 Load Transient Response
Figure 17. TPS61030 Line Transient Response
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