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LTC3589 Datasheet(PDF) 22 Page - Linear Technology

Part # LTC3589
Description  8-Output Regulator with Sequencing and I2C
PDF  44 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3589 Datasheet(HTML) 22 Page - Linear Technology

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LTC3589
22
3589p
Figure 4. Buck-Boost Switching Regulator Application Circuit
3589 F04
PVIN4
BB_OUT
SW4AB
SW4CD
A
BC
D
PWM
CONTROL
0.8V
EN
MODE
BB_FB
R1
22μF
R2
OPERATION
Table 7. Inductors for Step-Down Switching Regulator 1
MANUFACTURERS
PART NUMBER
VALUE
(μH)
DCR (Ω)
MAX DC
CURRENT (A)
SIZE (mm) W × L × H
Coilcraft
XPL4020-102ML
XPL4020-152ML
XPL4020-222ML
LPS6225-222ML
LPS6225-332ML
LPS6225-472ML
1.0
1.5
2.2
2.2
3.3
4.7
0.029
0.036
0.060
0.045
0.055
0.065
4.00
3.60
2.60
3.90
3.50
3.00
4.2 × 4.2 × 2.0
4.2 × 4.2 × 2.0
4.2 × 4.2 × 2.0
6.0 × 6.0 × 2.0
6.0 × 6.0 × 2.0
6.0 × 6.0 × 2.0
Cooper
SD14-1R2-R
SD14-1R5-R
SD14-2R0-R
SD25-2R2-R
1.2
1.5
2.0
2.2
0.034
0.039
0.045
0.031
3.35
2.91
2.56
2.80
5.2 × 5.2 × 1.45
5.2 × 5.2 × 1.45
5.2 × 5.2 × 1.45
5.2 × 5.2 × 2.5
Sumida
CDRH5D16NP-3R3N
3.3
0.045
2.60
5.6 × 5.6 × 1.8
TDK
VLF5014ST-1R0N2R7
VLF5014st-2R2N2R3
VLCF5020T-2R2N2R6-1
1.0
2.2
2.2
0.050
0.073
0.071
2.7
2.3
2.6
4.8 × 4.6 × 1.4
4.8 × 4.6 × 1.4
5.0 × 5.0 × 2.0
TOKO
1124BS-1R2N
1124BS-1R8N
1.2
1.8
0.047
0.056
2.9
2.7
4.5 × 4.7 × 1.8
4.5 × 4.7 × 1.8
Tokin
H-DI-0520-2R2
H-DI-0630-2R4
H-DI-0630-3R8
2.2
2.4
3.8
0.048
0.028
0.040
2.6
2.5
2
5.3 × 5.3 × 2.0
6.3 × 6.3 × 3.0
6.3 × 6.3 × 3.0
Wurth
744042001
744052002
744053003
7440530047
7440430022
1.0
2.5
3.0
4.7
2.2
0.028
0.030
0.024
0.030
0.023
2.60
2.4
2.8
2.4
2.5
4.8 × 4.8 × 1.8
5.8 × 5.8 × 1.8
5.8 × 5.8 × 2.8
5.8 × 5.8 × 2.8
4.8 × 4.8 × 2.8
switching regulator outputs. For good transient response
and stability the output capacitor should retain at least
10μF of capacitance over operating temperature and bias
voltage. Place at least 4.7μF decoupling capacitance as
close as possible to each PVIN pin. Refer to Table 11 for
recommended ceramic capacitor manufacturers.
BUCK-BOOST SWITCHING REGULATOR
Output Voltage Programming
Set the output voltage of the LTC3589 buck-boost switch-
ing regulator using an external resistor divider connected
from BB_OUT to the feedback pin BB_FB and to GND as
shown in Figure 4.
VBB_OUT = 0.8 • 1+
R1
R2
(V)



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