Datasheet
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TYPICAL CHARACTERISTICS
150
155
160
165
170
175
180
185
190
I
OUT
= 1 mA
V
IN
= 3.8 V,
C
OUT
= 10 µF
T
J
(°C)
I
OUT
= 250 mA
−40 −25 −10 5 20 35 50 65 80 95 110 125
I
GND
(µA)
3.250
3.255
3.260
3.265
3.270
3.275
3.280
3.285
3.290
0 50 100 200 250
(V)V
OUT
I
OUT
(mA)
2.765
2.770
2.775
2.780
2.785
2.790
2.800
−40 −25 −10 5 20 35 50 65 80 95 110 125
T
J
(°C)
(V)V
OUT
2.795
I
OUT
= 1 mA
I
OUT
= 200 mA
V
IN
= 3.8 V
C
OUT
= 10 µF
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
I
OUT
= 250 mA
I
OUT
= 1 mA
C
OUT
= 2.2 µF,
C
NR
= 0.1 µF,
V
IN
= 3.8 V
Frequency (Hz)
100 1000 10000 100000
Output Spectral Noise Density (µV/√Hz)
0
0.2
0.4
0.6
0.8
1.2
1.4
1.6
100 1000 10000 100000
C
OUT
= 10 µF,
I
OUT
= 250 mA
V
IN
= 3.8 V
Frequency (Hz)
C
NR
= 0.1 µF
C
NR
= 0.01 µF
C
NR
= 0.0047 µF
C
NR
= 0.001 µF
1.0
1.8
Output Spectral Noise Density (µV/√Hz)
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
I
OUT
= 250 mA
I
OUT
= 1 mA
C
OUT
= 10 µF,
C
NR
= 0.1 µF,
V
IN
= 3.8 V
Frequency (Hz)
100 1000 10000 100000
Output Spectral Noise Density (µV/√Hz)
0
10
20
30
40
50
60
0.001 0.0047 0.1
C
NR
(µF)
0.01
I
OUT
= 250 mA,
C
OUT
= 10 µF
RMS Output Noise (µV
RMS
)
0
50
100
150
200
250
T
J
(°C)
−40 −25 −10 5 20 35 50 65 80 95 110 125
I
OUT
= 1 mA
I
OUT
= 250 mA
V
IN
= 3.8 V,
C
OUT
= 10 µF
V
DO
(mV)
0.100
0.020
10 100 1 k 10 k
1
10
100 k 1 M 10 M
I
OUT
= 1 mA
I
OUT
= 250 mA
V
IN
= 4.3 V,
C
OUT
= 10 µF,
Frequency (Hz)
Z
O
, Output Impedance (Ω)
TPS794xx
SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005
TPS79433 TPS79428 TPS79428
OUTPUT VOLTAGE OUTPUT VOLTAGE GROUND CURRENT
vs OUTPUT CURRENT vs JUNCTION TEMPERATURE vs JUNCTION TEMPERATURE
Figure 2. Figure 3. Figure 4.
TPS79428 TPS79428 TPS79428
OUTPUT SPECTRAL OUTPUT SPECTRAL OUTPUT SPECTRAL
NOISE DENSITY NOISE DENSITY NOISE DENSITY
vs FREQUENCY vs FREQUENCY vs FREQUENCY
Figure 5. Figure 6. Figure 7.
TPS79428 TPS79433 TPS79428
ROOT MEAN SQUARED OUTPUT IMPEDANCE DROPOUT VOLTAGE
OUTPUT NOISE vs C
NR
vs FREQUENCY vs JUNCTION TEMPERATURE
Figure 8. Figure 9. Figure 10.
5
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