Datasheet

Optional
VIN= 3-6 V
VOUT = 1.8 V, 4 A
1
1
C4
R3
30.9 kW
R2
11.5 kW
R1
14.3 kW
R4
35.7 kW
R5
100 kW
C7
0.1 Fm
R6
20 kW
C5
820 pF
R7
10 kW
C1
10 Fm
C2
0.1 Fm
C8
47 Fm
C6
0.01 Fm
1
VIN
2
VIN
3
GND
4
GND
5
AGND
6
VSNS
7
COMP
8
RT/CLK
9
SS/TR
10
PH
11
PH
12
PH
13
BOOT
14
PWRGD
15
EN
16
VIN
17
PWPD
U1
TPS54478
C10
220 pF
C9
47 Fm
1
2
L1
1.2 Hm
C3
220 pF
VSNS
VSNS
VIN
VOUT
VIN
TPS54478
SLVSAS2 – JUNE 2011 www.ti.com
Figure 35. High Frequency, 1.8 V Output Power Supply Design with Adjusted UVLO
22 Copyright © 2011, Texas Instruments Incorporated