Datasheet

 
 
SLVS485 − AUGUST 2003
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5
TYPICAL CHARACTERISTICS
All graphs were generated using the circuit as shown unless otherwise noted. For output voltages other than
3.3 V, the output voltage divider was changed accordingly. Graphs for the TPS64203 were taken using the
application circuit shown in Figure 25.
SW
CDRH103R−100
Si5447DC
MBRM120LT3
EN
GND
FB
VIN
ISENSE
V
I
C
I
10 µF
X7R
TPS6420x
R
(ISENSE)
= 33 mΩ
R1
620 kΩ
R2
360 kΩ
Cff
4.7 pF
Co
47 µF PosCap
6TPA47M
V
O
1
2
3
6
5
4
10 µH
Figure 1. Basic Application Circuit For a 2-A Step-Down Converter
TABLE OF GRAPHS
FIGURE
η Efficiency vs Load current 2 − 5
Output voltage vs Output current 6 − 9
Switching frequency vs Output current 10 − 13
Operating quiescent current vs Input voltage 14
Output voltage ripple 15
Line transient response Using circuit according to Figure 1 16
Load transient response Using circuit according to Figure 1 17
Start-up timing Using circuit according to Figure 1 18