MCP1727
NOTE: Unless otherwise indicated VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF
Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN.
0
-10
-20
-30
-40
VR=2.5V Fixed
C
V
OUT=10 μF ceramic X7R
IN=3.3V
CIN=0 μF
OUT=10 mA
-50
-60
-70
-80
I
0.01
0.1
1
10
100
1000
Frequency (kHz)
FIGURE 2-25:
Power Supply Ripple
FIGURE 2-28:
2.5V (Fixed) Startup from
Rejection (PSRR) vs. Frequency (V
Fixed).
= 2.5V
Shutdown.
OUT
0
-10
-20
-30
-40
VR=2.5V Fixed
-50
C
V
OUT=22 μF ceramic X7R
IN=3.3V
CIN=0 μF
OUT=10 mA
-60
-70
-80
-90
I
0.01
0.1
1
10
100
1000
Frequency (kHz)
FIGURE 2-29:
Power Good (PWRGD)
of 1000 pF.
FIGURE 2-26:
Rejection (PSRR) vs. Frequency (V
Fixed).
Power Supply Ripple
Timing with C
= 2.5V
BYPASS
OUT
FIGURE 2-30:
Power Good (PWRGD)
of 0.1 µF.
FIGURE 2-27:
2.5V (Fixed) Startup from
Timing with C
V .
BYPASS
IN
DS21999B-page 12
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
