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TPS71257DRCR Datasheet(PDF) 8 Page - Texas Instruments

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Part # TPS71257DRCR
Description  Dual 250 mA Output, UltraLow Noise, High PSRR, Low-Dropout Linear Regulator
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS71257DRCR Datasheet(HTML) 8 Page - Texas Instruments

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350
300
250
200
150
100
50
0
100
1k
10k
100k
Frequency (Hz)
I
OUT = 250 mA
C
NR = 0.1 µF
V
OUT = 2.8 V
I
OUT = 10 mA
2.0
1.75
1.5
1.25
1.0
0.75
0.5
0.25
0
100
1k
10k
100k
Frequency (Hz)
0.001
µF
0.047
µF
0.01
µF
0.1
µF
C
OUT = 10 µF
I
OUT = 250 mA
V
OUT = 2.8 V
80
70
60
50
40
30
20
10
0
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
V
OUT = 2.8 V
C
OUT = 2.2 µF
C
NR = 0.01 µF
I
OUT = 1 mA
I
OUT = 250 mA
80
70
60
50
40
30
20
10
0
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
V
OUT = 2.8 V
C
OUT = 10 µF
C
NR = 0.01 µF
I
OUT = 1 mA
I
OUT = 250 mA
80
70
60
50
40
30
20
10
0
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
V
IN − VOUT (V)
f = 1 kHz
f = 10 kHz
f = 100 kHz
V
OUT = 2.8 V
I
OUT = 250 mA
C
OUT = 10 µF
C
NR = 0.01 µF
TPS71202, TPS71219
TPS71229, TPS71247
TPS71256, TPS71257
SBVS049D – MAY 2004 – REVISED AUGUST 2010
www.ti.com
TYPICAL CHARACTERISTICS (continued)
For all voltage versions at TJ = 25°C, VIN = VOUT(nom) + 1 V, IOUT = 1 mA,VEN = 1.2 V, COUT = 2.2 mF, and CNR = 0.01 mF,
unless otherwise noted.
NOISE SPECTRAL DENSITY
COUT = 10 mF
NOISE SPECTRAL DENSITY vs CNR
Figure 19.
Figure 20.
PSRR (RIPPLE REJECTION) vs FREQUENCY
PSRR (RIPPLE REJECTION) vs FREQUENCY
Figure 21.
Figure 22.
PSRR (RIPPLE REJECTION) vs VIN - VOUT
Figure 23.
8
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Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS71202 TPS71219 TPS71229 TPS71247 TPS71256 TPS71257


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