TPS54521 Datasheet, PDF (9/33 Pages) Texas Instruments – 4.5V to 17V Input, 5A Synchronous Step Down SWIFT™ Converter

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TPS54521
SLVS981 – JUNE 2010
TYPICAL CHARACTERISTICS (continued)
PIN pull-up CURRENT vs TEMPERATURE
1.20
VIN = 12 V
EN = 1.1 V
1.15
PIN UVLO THRESHOLD vs TEMPERATURE
1.24
VIN = 12 V
1.23
1.10
1.22
1.05
1.21
1.00
–50 –25
0
25
50
75 100 125
T_J – Junction Temperature – °C
Figure 7.
NON-SWITCHING OPERATING QUIESCENT CURRENT
(VIN) vs
INPUT VOLTAGE
800
T_J = –40°C
700
T_J = 25°C
T_J = 125°C
600
1.20
–50 –25
0
25
50
75 100 125
T_J – Junction Temperature – °C
Figure 8.
SLOW START CHARGE CURRENT vs
TEMPERATURE
2.50
2.40
2.30
500
2.20
400
3
6
9
12
15
18
V_I – Input Voltage – V
Figure 9.
(SS/TR - VSENSE) OFFSET vs TEMPERATURE
80
70
60
50
40
–50 –25
0
25
50
75 100 125
T_J – Junction Temperature – °C
Figure 11.
2.10
–50 –25
0
25
50
75 100 125
T_J – Junction Temperature – °C
Figure 10.
PWRGD THRESHOLD vs TEMPERATURE
120
VSENSE Rising
110
VSENSE Falling
100
VSENSE Rising
90
VSENSE Falling
80
–50 –25
0
25
50
75 100 125
T_J – Junction Temperature – °C
Figure 12.
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