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TPS40021 Datasheet(PDF) 21 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) 21 Page - Texas Instruments

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TPS40020
TPS40021
SLUS535C − MARCH 2003 − REVISED SEPTEMBER 2004
www.ti.com
21
TYPICAL CHARACTERISTICS
t − Time − 1 ms/div
Figure 22. Start−Up Operation Without
Transient Comparators
VDD = 3.3 V
VOUT = 1.5 V
fSW = 300 kHz
ILOAD = 5 A
PWRGD
SS/SD
VOUT
t − Time − 25
µs/div
PVDD
VOUT
SW
Figure 23. PVDD Hysteresis
VDD = 3.3 V
VOUT = 1.5 V
fSW = 300 kHz
ILOAD = 5 A
t − Time − 1 ms/div
Figure 24. Start−Up Operation With
Transient Comparators
VDD = 3.3 V
VOUT = 1.5 V
fSW = 300 kHz
ILOAD = 5 A
PWRGD
VOUT
SS/SD
t − Time − 200
µs/div
SD
COMP
SW
Figure 25. COMP Shutdown Operation
VDD = 3.3 V
VOUT = 1.5 V
fSW = 300 kHz
ILOAD = 5 A



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