TPS7A7200 Datasheet, PDF (12/29 Pages) Texas Instruments – 2-A, Fast-Transient, Low-Dropout Voltage Regulator

TPS7A7200
SBVS136C – MARCH 2012 – REVISED MAY 2012
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TYPICAL CHARACTERISTICS (continued)
At T_J = +25°C, V_IN = V_OUT(TARGET) + 0.3 V, I_OUT = 25 mA, V_(EN) = V_IN, C_IN = 10 μF, C_OUT = 10 μF, C_(SS) = 10 nF, and the PG pin
pulled up to V_IN with 100-kΩ pull-up resistor, unless otherwise noted.
EN PULSE ON RESPONSE
(Over Stable V_IN)
5
EN PULSE OFF RESPONSE
(Over Stable V_IN)
5
4.5
4
V_IN
V_OUT
4.5
4
V_IN
3.5
3.5
3
V_EN
2.5
2
1.5
50−Ω resistor from OUT to GND
1
V_OUT(TARGET) = 3.3 V
400mV, 800mV, 1.6V pins to GND
0.5
50mV, 100mV, 200mV pins open
0
3
2.5
2
V_EN
1.5
1
0.5
0
V_OUT
50−Ω resistor from OUT to GND
V_OUT(TARGET) = 3.3 V
400mV, 800mV, 1.6V pins to GND
50mV, 100mV, 200mV pins open
Time (1 ms/div)
G304
Figure 29.
Time (1 ms/div)
G305
Figure 30.
SOFT-START DELAY vs C_SS (Enlarged View)
5
4.5
4
V_OUT (C_SS=0F) ^{VOUT(TARGET) = 3.3 V}
V_IN
50−Ω resistor from OUT to GND
3.5
3
2.5 ^VEN
2
1.5
V_OUT (C_SS=10nF)
V_OUT (C_SS=100nF)
1
0.5
V_OUT (C_SS=1µF)
0
Time (5 ms/div)
G306
Figure 31.
SOFT-START DELAY vs C_SS (Reduced View)
5
4.5
4
V_IN
V_OUT (C_SS=0F)
3.5
3
2.5
V_EN
2
V_OUT (C_SS=10nF)
V_OUT (C_SS=100nF)
1.5
V_OUT (C_SS=1µF)
1
0.5
V_OUT(TARGET) = 3.3 V
50−Ω resistor from OUT to GND
0
Time (50 ms/div)
G307
Figure 32.
1000
100
SOFT-START DELAY vs C_SS
0%V_OUT to 90%V_OUT
50−Ω resistor from OUT to GND
V_OUT(TARGET) = 3.3 V
400mV, 800mV, 1.6V pins to GND
50mV, 100mV, 200mV pins open
10
1
0.1
1
10
100
C_SS (nF)
Figure 33.
1000
G308
12
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