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TPS61040
TPS61041
SLVS413B 鈥?OCTOBER 2002 鈥?REVISED MAY 2004
D3
V2 = -10 V/15 mA
D2
L1
6.8
碌H
TPS61040
V
IN
= 2.7 V to 5 V
C1
4.7
碌F
V
IN
SW
FB
EN
GND
R2
210 kW
R1
1.5 MW
C3
1
碌F
D1
V1 = 10 V/15 mA
C
FF
22 pF
C2
1
碌F
L1:
D1, D2, D3:
C1:
C2, C3, C4:
Murata LQH4C6R8M04
Motorola MBR0530
Tayo Yuden JMK212BY475MG
Tayo Yuden EMK316BJ105KF
C4
4.7
碌F
Figure 19. Positive and Negative Output LCD Bias Supply
L1
6.8
碌H
TPS61040
V
IN
3.3 V
V
IN
SW
FB
EN
GND
R2
205 kW
R1
1.8 MW
D1
V
O =
12 V/35 mA
C
FF
4.7 pF
C2
4.7
碌F
L1:
D1:
C1:
C2:
Murata LQH4C6R8M04
Motorola MBR0530
Tayo Yuden JMK212BJ106MG
Tayo Yuden EMK316BJ475ML
C1
10
碌F
Figure 20. Standard 3.3-V to 12-V Supply
3.3
碌H
TPS61040
1.8 V to 4 V
V
IN
SW
FB
C1
4.7
碌F
EN
GND
R2
200 kW
R1
620 kW
D1
5 V/45 mA
C
FF
3.3 pF
C2
4.7
碌F
L1:
D1:
C1, C2:
Murata LQH4C3R3M04
Motorola MBR0530
Tayo Yuden JMK212BY475MG
Figure 21. Dual Battery Cell to 5V/50mA Conversion
Efficiency Aprox. Equals 84% at Vin = 2.4 V to Vo = 5 V/45 mA
15