SC1452_06 Datasheet, PDF (12/15 Pages) Semtech Corporation – Dual 150mA LDO Regulator with Programmable Reset

SC1452
POWER MANAGEMENT
Typical Characteristics (Cont.)
Output Spectral Noise Density vs. Frequency
vs. Bypass Capacitance
10
V_OUT = 1.8V
V_IN = 2.8V
I_OUT = 50mA
C_IN = 1µF
1
C_OUT = 2.2µF
T_J = 25°C
0.1
0.01
C_BYP = 100pF
C_BYP = 1nF
C_BYP = 10nF
C_BYP = 100nF
C_BYP = 1µF
0.01
0.1
1
10
100
f (kHz)
PSRR vs. Frequency vs. Output Voltage
(C = 10nF)
BYP
75
70
65
60
55
50
45
40
V_IN = V_OUT + 1V
C_IN = C_OUT = 1µF
35 ^CBYP ^{= 10nF}
30
I_OUT = 1mA
T_J = 25°C
Top to bottom:
V_OUT = 1.8V
V_OUT = 2.5V
V_OUT = 2.8V
V_OUT = 3.0V
V_OUT = 3.3V
25
0.01
0.1
1
10
100
f (kHz)
1000
1000
Output Spectral Noise Density vs. Frequency
vs. Output Current
10
Top to bottom:
I_OUT = 150mA
I_OUT = 100mA
1
I_OUT = 50mA
I_OUT = 1mA
0.1
0.01
V_OUT = 1.8V
V_IN = 2.8V
C_IN = 1µF
C_BYP = 10nF
C_OUT = 2.2µF
T_J = 25°C
0.001
0.01
0.1
1
10
100
f (kHz)
PSRR vs. Frequency vs. Output Voltage
(C = 100nF)
BYP
75
70
65
60
55
50
45
40
V_IN = V_OUT + 1V
C_IN = C_OUT = 1µF
35 ^CBYP ^{= 100nF}
30
I_OUT = 1mA
T_J = 25°C
Top to bottom:
V_OUT = 1.8V
V_OUT = 2.5V
V_OUT = 2.8V
V_OUT = 3.0V
V_OUT = 3.3V
25
0.01
0.1
1
10
100
f (kHz)
1000
1000
 2006 Semtech Corp.
12
www.semtech.com