LP38843_15 Datasheet, PDF (5/17 Pages) Texas Instruments – 3A Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors

LP38843
www.ti.com
SNVS290C – DECEMBER 2004 – REVISED APRIL 2013
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified: T_J = 25°C, C_IN = 10 µF CER, C_OUT = 22 µF CER, C_BIAS = 1 µF CER, S/D Pin is tied to V_BIAS, V_OUT
= 1.2V, I_L = 10mA, V_BIAS = 5V, V_IN = V_OUT + 1V.
V_BIAS Transient Response
Load Transient Response
6
V_BIAS
5
4
2
I_LOAD
1
0
10
V_OUT
0
I_L = 10 mA
-10
V_OUT = 1.2V
V_IN = 1.7V
20 Ps/DIV
Figure 3.
50
V_OUT
0
-50
V_OUT = 0.8V
C_OUT = 22 PF Cer
50 Ps/DIV
Figure 4.
Load Transient Response
2
I_LOAD
1
0
Dropout Voltage Over Temperature
50
V_OUT
0
-50
C_OUT = 4.7 PF Tantalum
V_OUT = 0.8V
50 Ps/DIV
Figure 5.
V_OUT
vs
Temperature
1.55
1.54
1.53
1.52
1.51
1.50
1.49
1.48
1.47
1.46
1.45
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (^oC)
Figure 7.
Figure 6.
100
90
_
80
_
70
_
60
_
50
_
40
_
30
_
20
_
10
_
0
1000
V_BIAS PSRR
C_OUT = 4.7 PF Tantalum
I_LOAD = 10 mA
10000
_
100000
_
FREQUENCY (Hz)
Figure 8.
1000000_
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