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TPS40021 Datasheet(PDF) 19 Page - Texas Instruments

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Part # TPS40021
Description  ENHANCED LOW INPUT VOLTAGE MODE SYNCHRONOUS BUCK CONTROLLER
PDF  32 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS40021 Datasheet(HTML) 19 Page - Texas Instruments

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TPS40020
TPS40021
SLUS535C − MARCH 2003 − REVISED SEPTEMBER 2004
www.ti.com
19
TYPICAL CHARACTERISTICS
RT − Timing Resistance − kΩ
TIMING RESISTANCE
vs
SWITCHING FREQUENCY
Figure 14
20
40
60
80
100
120
140
160
100
1000
500
600
800
900
300
400
700
200
VIN = 3.9 V
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
−50
−25
0
25
50
75
100
125
SOFT-START CURRENT
vs
JUNCTION TEMPERATURE
Figure 15
TJ − Junction Temperature − °C
Figure 16
−50
−20
−25
20
−5
0
15
0
25
50
75
100
125
10
−10
5
−15
ILIM OFFSET VOLTAGE
vs
JUNCTION TEMPERATURE
TJ − Junction Temperature − °C
VDD = 2.0 V
VDD = 3.2 V
VDD = 4.9 V
SHUTDOWN THRESHOLD VOLTAGE
vs
JUNCTION TEMPERATURE
Figure 17
TJ − Junction Temperature − °C
−50
−25
0
25
50
75
100
125
0.20
0.30
0.24
0.25
0.27
0.29
0.22
0.28
0.23
0.26
0.21
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