TPS7A3301 Datasheet, PDF (9/26 Pages) Texas Instruments – –36-V, –1-A, Ultralow-Noise Negative Voltage Regulator

TPS7A33
www.ti.com
SBVS169B – DECEMBER 2011 – REVISED MARCH 2012
TYPICAL CHARACTERISTICS (continued)
At T_J = –40°C to +125°C, |V_IN| = |V_OUT(NOM)| + 1.0 V or |V_IN| = 3.0 V (whichever is greater), V_EN = V_IN, I_OUT = 1 mA, C_IN = 22 μF,
C_OUT = 22 μF, C_NR/SS = 0 nF, and the FB pin tied to OUT, unless otherwise noted.
POWER-SUPPLY REJECTION RATIO vs V_DO
110
100
V_DO = 1V
V_DO = 750mV
V_DO = 350mV
V_DO = 300mV
90
V_DO = 500mV
80
70
OUTPUT SPECTRAL NOISE DENSITY vs OUTPUT
CURRENT
10
I_OUT = 1mA, V_NOISE = 16.26µV_RMS
I_OUT = 1A, V_NOISE = 16.48µV_RMS
1
60
50
40
30
20 ^IOUT ^{= 1A}
10
C_NR = 10nF
C_OUT = 22µF
0
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
0.1
C_OUT = 22µF
C_{NR SS} = 10nF
BW_RMSNOISE [10Hz, 100kHz]
0.01
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 19.
Figure 20.
OUTPUT SPECTRAL NOISE DENSITY vs C_NR/SS
10
C_{NR SS} = 0nF, V_NOISE = 78µV_RMS
C_{NR SS} = 10nF, V_NOISE = 16µV_RMS
OUTPUT SPECTRAL NOISE DENSITY vs V_OUT(NOM)
10
V_OUT = −1.171V, V_NOISE = 16.48µV_RMS
V_OUT = −5V, V_NOISE = 37µV_RMS
1
1
0.1
C_OUT = 22µF
BW_RMSNOISE [10Hz, 100kHz]
0.01
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 21.
LOAD TRANSIENT
0.1
I_OUT = 1A
C_OUT = 22µF
C_{NR SS} = 10nF
BW_RMSNOISE [10Hz, 100kHz]
0.01
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 22.
LOAD TRANSIENT
I_OUT = 1 mA to 500 mA
V_IN = 16 V
V_OUT = 15 V
Time (100 ms/div)
Figure 23.
Copyright © 2011–2012, Texas Instruments Incorporated
I_OUT = 500 mA to 1 mA
V_IN = 16 V
V_OUT = 15 V
Time (100 ms/div)
Figure 24.
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