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TPS54821 Datasheet(PDF) 27 Page - Texas Instruments

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Part # TPS54821
Description  4.5 V to 17 V Input, 8 A Synchronous Step Down SWIFT??Converter With Hiccup
PDF  37 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54821 Datasheet(HTML) 27 Page - Texas Instruments

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background image
0.00001
0.0001
0.001
0.01
0.1
1
10
0.001
0.01
0.1
1
10
TrackInVoltage-V
0.00001
0.0001
0.001
0.01
0.1
1
10
Vout
IdealVsense
Vsense
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
0.6
0.8
1
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
Output Current (A)
VIN = 12 V
G003
V
=12V,
V
=3.3V,
Fsw=480kHz,
roomtemp,noairflow
IN
OUT
25
50
75
100
125
150
0
1
2
3
4
5
6
LoadCurrent- A
0
10
20
30
40
50
60
70
80
90
100
0
1
2
3
4
5
6
7
8
Output Current (A)
VIN = 8 V
VIN = 12 V
VIN = 17 V
G001
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
Output Current (A)
VIN = 8 V
VIN = 12 V
VIN = 17 V
G002
V
= 2 V/div
OUT
I
= 10 A/div
OUT
Time = 20 ms/div
PH = 10 V/div
TPS54821
www.ti.com
SLVSB14
– OCTOBER 2011
LOAD REGULATION
TRACKING PERFORMANCE
Figure 39.
Figure 40.
MAXIMUM AMBIENT TEMPERATURE
EFFICIENCY
vs
vs
LOAD CURRENT
LOAD CURRENT
Figure 41.
Figure 42.
EFFICIENCY
vs
OUTPUT CURRENT
TPS54821 Hiccup Mode Current Limit
Figure 43.
Figure 44.
Copyright
© 2011, Texas Instruments Incorporated
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Product Folder Link(s) :TPS54821



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