MCP1827/MCP1827S
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, R PWRGD = 10 k Ω To V IN .
0
-10
-20
-30
-40
-50
-60
-70
-80
V R =3.3V Fixed
C OUT =10 μ F ceramic X7R
V IN =3.9V
C IN =0 μ F
I OUT =10 mA
0.01
0.1
1 10
100
1000
Frequency (kHz)
FIGURE 2-25:
Power Supply Ripple
FIGURE 2-28:
2.5V (Adj.) Startup from
Rejection (PSRR) vs. Frequency (V OUT = 3.3V
Fixed).
0
-10
-20
-30
Shutdown.
-40
-50
-60
-70
-80
V R =3.3V Fixed
C OUT =22 μ F ceramic X7R
V IN =3.9V
C IN =0 μ F
I OUT =10 mA
0.01
0.1
1 10
100
1000
Frequency (kHz)
FIGURE 2-26: Power Supply Ripple
Rejection (PSRR) vs. Frequency (V OUT = 3.3V
Fixed).
FIGURE 2-29:
Timing.
Power Good (PWRGD)
FIGURE 2-27:
2.5V (Adj.) Startup from V IN .
FIGURE 2-30:
(3.3V Fixed).
Dynamic Line Response
? 2007 Microchip Technology Inc.
DS22001C-page 13
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