Datasheet

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Application Circuit Schematic
TP3
TP1
C2
33 nF
D1
R5
TP4
R4
J2
1
2
GND
J1
1
2
GND
TP2
1 2
R3
C4
3
5 4
AVIN PVIN
FB GND SW
6
BOOST
TPS40222
1
UDG−05099
+V
OUT
1.2 V
C1A
22 µF
C1B
22 µF
C1C
0.1 µF
L1
3.3 µH
C3A
22 µF
C3B
22 µF
R1
5.6 kΩ
R2
10 kΩ
+V
IN
4.5 V to 5.5 V
C5
1 µF
2
TPS40222
SLUS642A – OCTOBER 2005 – REVISED JANUARY 2006
Figure 15 shows an example of an application incorporating a TPS40222 in a 1.2-V output DC-to-DC converter.
Notice the use of parallel capacitors at the input and the output to reduce the effective ESR of the capacitance.
Figure 15. 5-V
IN
, 1.2 V
OUT
DC-to-DC Converter
17