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TPS40322RHBT Datasheet(PDF) 31 Page - Texas Instruments

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Part # TPS40322RHBT
Description  Dual Output or Two-Phase Synchronous Buck Controller
Download  47 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS40322RHBT Datasheet(HTML) 31 Page - Texas Instruments

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background image
100
1000
10000
100000
1000000
−60
−40
−20
0
20
40
60
80
100
−135
−90
−45
0
45
90
135
180
225
Frequency (Hz)
Gain
Phase
G001
100
1000
10000
100000
1000000
−60
−40
−20
0
20
40
60
80
100
−135
−90
−45
0
45
90
135
180
225
Frequency (Hz)
Gain
Phase
G001
50
55
60
65
70
75
80
85
90
95
0
1
2
3
4
5
6
7
8
9
10
Output Current (A)
VIN = 8 V
VIN = 12 V
VIN = 15 V
VOUT = 1.2 V
G001
50
55
60
65
70
75
80
85
90
95
0
1
2
3
4
5
6
7
8
9
10
Output Current (A)
VIN = 8 V
VIN = 12 V
VIN = 15 V
VOUT = 1.8 V
G001
(
)
(
) (
)
(
)
UVLO(max)
UVLO set
UVLO hys
UVLO(on _ min)
UVLO(max)
V
1.25 V
R
R
68.1k
12.6k
12.7k
8.0 V 1.25 V
V
V
>
´
=
W
=
W »
W
-
-
(
)
( )
( )
UVLO on
UVLO off
UVLO hys
UVLO
V
V
8 V
7 V
R
66.7k
68.1k
I
15 A
-
-
=
=
=
W »
W
m
TPS40322
www.ti.com
SLUSAF8E – JULY 2011 – REVISED JANUARY 2016
8.2.1.2.11.7
UVLO Programming Resistors (R1 and R3)
The UVLO hysteresis level is programmed by R1 with Equation 28 and Equation 29.
(28)
(29)
8.2.1.2.11.8
VDD Bypass Capacitor (C2)
As shown in the Pin Configuration and Functions section, use a 0.1-µF, 50-V, X7R capacitor for VDD bypass.
8.2.1.2.11.9
VBP6 Bypass Capacitor (C18)
Select a 3.3-µF (or greater) low ESR capacitor for BP6. For this design use a 3.3-µF, X5R ceramic capacitor.
8.2.1.3 Application Curves
Figure 24. Efficiency vs Load Current (8 V to 15 V to 1.2 V
Figure 25. Efficiency vs Load Current (8 V to 15 V to 1.8 V
at 10 A, Design Example 1)
at 10 A, Design Example 1)
Figure 26. Design Example 1 Loop Response
Figure 27. Design Example 1 Loop Response
VIN = 12 V, VOUT1 = 1.2 V, IOUT1 = 10 A, 80-kHz Bandwidth,
VIN = 12 V, VOUT2 = 1.8 V, IOUT2 = 10 A, 80-kHz Bandwidth,
50° Phase Margin
50° Phase Margin
Copyright © 2011–2016, Texas Instruments Incorporated
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