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| TPS74012_15 Datasheet, PDF (8/26 Pages) Texas Instruments – 1.5-A, Low-Voltage LDO Regulator with Dual Input Voltages | |||
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TPS740xx
SBVS091C â JUNE 2011 â REVISED DECEMBER 2011
www.ti.com
TYPICAL CHARACTERISTICS (continued)
At TJ = +25°C, VIN = 2.5 V, VBIAS = 5.0 V, VOUT(target) = 1.5 V, VEN = VBIAS, CIN = 2.2 μF, CBIAS = 2.2 μF, and COUT = 10 μF,
unless otherwise noted.
DROPOUT CHARACTERISTICS
(INPUT VOLTAGE)
DROPOUT CHARACTERISTICS
(BIAS VOLTAGE)
1.6
VBIAS = 5 V
1.4 VOUT = 1.5 V
1.6
VIN = 2.5 V
1.4 VOUT = 1.5 V
1.2
1.2
1
1
0.8
0.8
0.6
0.6
0.4
0.2
0
0
IOUT = 10 mA
IOUT = 1.5 A
0.5
1
1.5
2
2.5
Input Voltage (V)
Figure 9.
0.4
0.2
0
0
IOUT = 10 mA
IOUT = 1.5 A
1
2
3
4
5
6
7
Bias Voltage (V)
Figure 10.
1.515
1.51
1.505
LOAD REGULATION
VBIAS = 5 V
VIN = 2.5 V
MAXIMUM BIAS CURRENT vs BIAS VOLTAGE(1)
300
VFB = 0 V
250 IOUT = 1.5 A
VIN = 2.5 V
200
1.5
1.495
1.49
150
TPS74001
100
Reference Device A
50
1.485
0
200 400 600 800 1000 1200 1400 1600
Output Current (mA)
Figure 11.
0
3
3.5
4
4.5
5
5.5
6
6.5
Bias Voltage (V)
Figure 12.
MAXIMUM BIAS CURRENT vs TEMPERATURE
300
VBIAS = 5 V
250 VFB = 0 V
VIN = 2.5 V
200
150
100
50
0
-40 -25 -10 5
20 35 50 65 80 95 110 125
Temperature (°C)
Figure 13.
BIAS CURRENT vs TEMPERATURE
45
40
VIN = 2.5 V
VOUT = 1.5 V
35 VBIAS = 5 V
30
IOUT = 10 mA
IOUT = 100 mA
IOUT = 750 mA
IOUT = 1500 mA
25
20
15
10
5
0
-40 -25 -10 5
20 35 50 65 80 95 110 125
Temperature (°C)
Figure 14.
(1) This device does not show large bias current at any condition.
8
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