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TPS2149 Datasheet(PDF) 8 Page - Texas Instruments

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Part # TPS2149
Description  3.3-V LDO AND DUAL SWITCH FOR USB BUS-POWERED HUB POWER MANAGEMENT
PDF  19 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS2149 Datasheet(HTML) 8 Page - Texas Instruments

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TPS2149
TPS2159
SLVS401 – AUGUST 2001
8
www.ti.com
PARAMETER MEASUREMENT INFORMATION
toff
tpd(off)
ton
tpd(on)
50%
50%
90%
90%
10%
10%
tr
tf
90%
90%
10%
10%
VI(ENx)
VO(OUTx)
VO(OUTx)
TIMING
Figure 1. Timing and Internal Voltage Regulator Transition Waveforms
TYPICAL CHARACTERISTICS
Figure 2
VO(OUT)
(2 V/div)
VI = 5 V
TA = 25°C
CL = 1 µF
RL = 25 Ω
SWITCH TURNON DELAY AND RISE TIME
WITH 1-
µF LOAD
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4.2
t – Time – ms
VI(EN)
(5 V/div)
Figure 3
SWITCH TURNOFF DELAY AND FALL TIME
WITH 1-
µF LOAD
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4.2
t – Time – ms
VO(OUT)
(2 V/div)
VI = 5 V
TA = 25°C
CL = 1 µF
RL = 25 Ω
VI(EN)
(5 V/div)



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