MCP1727
NOTE: Unless otherwise indicated V OUT = 1.8V (Adjustable), V IN = 2.8V, C OUT = 4.7 μF Ceramic (X7R), C IN = 4.7 μF
Ceramic (X7R), I OUT = 1 mA, Temperature = +25°C, V IN = V OUT + 0.6V, RPWRGD = 10 k Ω To V IN .
0.40
0.35
0.30
0.25
0.20
Temperature = 25°C
V OUT = 2.5V
V OUT = 5.0V
10
1
0.1
V R =2.5V, V IN =3.3V
V R =0.8V, V IN =2.3V
C OUT =1 μ F ceramic X7R
C IN =10 μ F ceramic
I OUT =200 mA
0.15
0.10
0.05
0.00
0.01
0.001
0
250
500
750
1000
1250
1500
0.01
0.1
1 10
100
1000
Load Current (mA)
Frequency (kHz)
FIGURE 2-19:
Dropout Voltage vs. Load
FIGURE 2-22:
Output Noise Voltage
Current.
Density vs. Frequency.
0.45
0.40
I OUT = 1.5A
0
-10
-20
-30
0.35
0.30
V OUT = 5.0V
V OUT = 2.5V
-40
-50
-60
-70
V R =1.2V Adj
C OUT =10 μ F ceramic X7R
V IN =3.1V
C IN =0 μ F
I OUT =10 mA
0.25
-45
-20
5
30
55
80
105
130
-80
0.01
0.1
1 10
100
1000
Temperature (°C)
Frequency (kHz)
FIGURE 2-20:
Dropout Voltage vs.
FIGURE 2-23:
Power Supply Ripple
Temperature.
3.00
2.50
2.00
Rejection (PSRR) vs. Frequency (V OUT = 1.2V
Adj.).
0
-10
-20
-30
1.50
1.00
0.50
0.00
V OUT = 2.5V
Temperature = 25°C
-40
-50
-60
-70
-80
V R =1.2V Adj
C OUT =22 μ F ceramic X7R
V IN =3.1V
C IN =0 μ F
I OUT =10 mA
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0.01
0.1
1 10
100
1000
Input Voltage (V)
Frequency (kHz)
FIGURE 2-21:
Short Circuit Current vs.
FIGURE 2-24:
Power Supply Ripple
Input Voltage.
? 2007 Microchip Technology Inc.
Rejection (PSRR) vs. Frequency (V OUT = 1.2V
Adj.).
DS21999B-page 11
相关PDF资料
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