SC1453_06 Datasheet, PDF (9/14 Pages) Semtech Corporation – 150mA Ultra Low Dropout Regulator with Low Noise Bypass

SC1453
POWER MANAGEMENT
Typical Characteristics (Cont.)
Dropout Voltage vs. Junction Temperature
vs. Output Current
200
175
150
I_OUT = 150mA
125
100
75
50
I_OUT = 50mA
25
0
-50
-25
0
25
50
75
100
125
T_J (°C)
Bypass Start-up Rise Time vs. Junction Temperature
1.8
1.7 ^{CBYP = 10nF}
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
-50
-25
vs. Input Voltage
V_IN = 3.8V
V_IN = 6.5V
0
25
50
75
T_J (°C)
100
125
Reverse Battery Protection vs.
Junction Temperature
5.0
4.5 ^{VIN = VEN = -6.5V}
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
-25
0
25
50
75
T_J (°C)
100
125
Dropout Voltage vs. Output Current
vs. Junction Temperature
200
175
150
125
100
75
50
25
0
0
Top to bottom:
T_J = 125°C
T_J = 25°C
T_J = -40°C
25
50
75
100
125
150
I_OUT (mA)
Enable Input Threshold Voltage vs. Junction
Temperature vs. Input Voltage
1.6
1.4 _{VIH @ VIN = 6.5V}
1.2 ^{VIH @ VIN = 3.8V}
1.0 V_IL @ V_IN = 6.5V
0.8
V_IL @ V_IN = 3.8V
0.6
0.4
-50
-25
0
25
50
75
100
125
T_J (°C)
Output Spectral Noise Density vs. Frequency
vs. Output Voltage, C_OUT = 1µF
10
V_IN = V_OUT + 1V
I_OUT = 1mA
C_IN = 1µF
1
C_BYP = 10nF
T_J = 25°C
0.1
0.01
Top to bottom:
V_OUT = 3.3V
V_OUT = 3.0V
V_OUT = 2.8V
V_OUT = 2.5V
V_OUT = 1.8V
V_OUT = 1.5V
0.001
0.01
0.1
1
10
f (kHz)
100
1000
 2006 Semtech Corp.
9
www.semtech.com