Datasheet

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SWN
C3
10 µF
L1
10 µH
R1
R2
VBAT
VOUT
LDOIN
LDOSENSE
LDOOUT
R7 R9
C6
2.2 µF
C4
100 µF
U1
LBO
PGOOD
PGND
LBI
SKIPEN
EN
LDOEN
GND
TPS61121PW
List of Components:
U1 = TPS61121PW
L1 = Sumida CDRH73−100
C3, C5, C6,
C7, C8 = X7R/X5R Ceramic
C4 = Low ESR Tantalum
DS1 = BAT54S
3.3 V
C5
2.2 µF
1.5 V
LBO
PGOOD
C7
0.1 µF
DS1
C8
1 µF
−3 V
SWP
SWN
C3
10 µF
L1
10 µH
R1
R2
VBAT
VOUT
FB
R3
R6
LDOIN
R5
R4
LDOSENSE
LDOOUT
R7 R9
C6
22 µF
C5
2.2 µF
U1
LBO
PGOOD
PGND
LBI
SKIPEN
EN
LDOEN
GND
TPS61121PW
List of Components:
U1 = TPS61121PW
L1 = Sumida CDRH73−100
C3, C5 = X7R/X5R Ceramic
C6 = X7R/X5R Ceramic or Low
ESR Tantalum
3.3 V
LBO
PGOOD
SWP
TPS61120
TPS61122, TPS61121
SLVS427C – JUNE 2002 – REVISED APRIL 2004
APPLICATION INFORMATION (continued)
Figure 28. Dual Power Supply With Auxiliary Negative Output Voltage
Figure 29. Single Output Using LDO as Filter
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