RT9178
Typical Operating Characteristics
Output Voltage vs. Temperature
3.5
100
95
Quiescent Current vs. Temperature
Quiescent Current (uA)
Output Voltage (V)
3.3
90
85
80
75
70
3.1
2.9
2.7
V
IN
= 4V
C
BP
= 10nF
C
IN
= 1uF
C
OUT
= 1uF
-35
-15
5
25
45
65
85
105
125
2.5
V
IN
= 4V
C
BP
= 10nF
C
IN
= 1uF
C
OUT
= 1uF
-35
-15
5
25
45
65
85
105
125
Temperature
(
°
C)
Temperature
(
°
C)
0
-10
-20
PSRR
0
-10
-20
PSRR
PSRR(dB)
PSRR (dB)
-30
-40
-50
-60
-70
-80
-90
0.01
0.1
1
100mA
-30
-40
-50
-60
-70
-80
-90
0.01
0.1
1
10
100mA
1mA
1mA
V
IN
= 4V
C
BP
= 10nF
C
IN
= 1uF
C
OUT
= 1uF
T
A
= 25°C
10
100
1000
V
IN
= 4V
C
BP
= 10nF
C
IN
= 1uF
C
OUT
= 1uF
T
A
= -35°C
100
1000
Frequency (kHz)
Frequency (kHz)
Dropout Voltage vs. Load Current
0.3
0.25
Line Transient Response
Input Voltage
Deviation(V)
V
IN
= 3.2 to 3.8V
C
BP
= 10nF
3.8
3.2
C
IN
= 1uF
C
OUT
= 10uF
T
J
= 125° C
Dropout Voltage (V)
0.2
T
J
= 25° C
0.15
Output Voltage
Deviation(mV)
0.1
0.05
0
0
25
50
75
100
125
T
J
= -35° C
V
IN
= 4V
C
BP
= 10nF
C
IN
= 1uF
C
OUT
= 1uF
150
175
200
20
0
-20
Time (500us/Div)
Load Current (mA)
DS9178-16 April 2008
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5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
