30128233
FIGURE 19. Typical ECO Operation
Inductor Selection for Buck 1 and Buck 2 Operation
A 1.0
μ
H inductor should be selected. The inductor should be able to handle the maximum current without significant degradation
on inductance and it’s saturation current should not be significantly lower than 1.2A. Additionally the inductors DC Resistance
should not be greater than 100m
Ω
. The table below shows the possible selection of inductor types and suppliers.
TABLE 13. Buck 1 and Buck 2 Operation
Model
Vendor
Dimensions LxWXH (mm)
DCR (m
Ω)
MIPSZ2012D1R0
FDK
2.0 x 1.25 x 1
90
CBC2016T1R0M
Taiyo Yuden
2.0 x 1.6 x 1.6
100
EPL2010-102ML
Coilcraft
2.0 x 2.0 x 1.05
99
Buck Output Voltage Selection
The selection of the bucks’ output voltages can be done by writing a specific code into the control registers (addr. 0x12, 0x22, 0x32
for Buck1… addr. 0x13, 0x23, 0x33 for Buck2). The required voltage can be calculated from the following equation.
V
OUT
(V) = 0.6V + code(dec) x 0.00588V
TABLE 14. ENB2
Bank 0: CONFIG = Z (0x11h)
Bank 1: CONFIG = H (0x21h)
Bank 2: CONFIG = L (0x31h)
Bits
Field
Description
2:0
BK1_DELAY
This sets the time slot when Buck1 enables and disables.
000
Power up in slot 0, Power down in slot 0
001
Power up in slot 1, Power down in slot 1
010
Power up in slot 2, Power down in slot 2
011
Power up in slot 3, Power down in slot 3
100
Power up in slot 4, Power down in slot 4
101
Power up in slot 5, Power down in slot 5
110
Power up in slot 6, Power down in slot 6
111
Power up in slot 7, Power down in slot 7
55
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LM49360
Summary of Contents for Boomer LM49360
Page 3: ...5 0 LM49360 Overview 301282h8 FIGURE 1 LM49360 Block Diagram www ti com 2 LM49360...
Page 4: ...6 0 Typical Application 30128211 FIGURE 2 Sub PMU System Diagram 3 www ti com LM49360...
Page 5: ...30128216 FIGURE 3 AP PMU System Diagram www ti com 4 LM49360...
Page 16: ...301282h9 FIGURE 4 PMU State Machine 15 www ti com LM49360...
Page 68: ...30128213 FIGURE 20 Internal Clock Network 67 www ti com LM49360...
Page 128: ...40 0 Schematic Diagram 30128220 FIGURE 36 Demo Board Schematic 127 www ti com LM49360...
Page 129: ...30128245 FIGURE 37 Demo Board Schematic www ti com 128 LM49360...
Page 131: ...30128238 FIGURE 40 Inner Layer 2 30128239 FIGURE 41 Inner Layer 3 www ti com 130 LM49360...
Page 132: ...30128240 FIGURE 42 Inner Layer 4 30128241 FIGURE 43 Inner Layer 5 131 www ti com LM49360...
Page 133: ...30128231 FIGURE 44 Bottom Layer 30128242 FIGURE 45 Bottom Silkscreen www ti com 132 LM49360...
Page 136: ...Notes 135 www ti com LM49360...
