Datasheet

MCP1725
DS22026B-page 12 © 2007 Microchip Technology Inc.
Note: Unless otherwise indicated, V
IN
= V
OUT
+ 0.5V or V
IN
= 2.3V (whichever is greater), I
OUT
= 1 mA,
C
IN
= C
OUT
= 4.7 µF Ceramic (X7R), SHDN = V
IN
, C
DELAY
= Open, Fixed Output Version, and T
A
= +25°C.
FIGURE 2-25: Power Supply Ripple
Rejection (PSRR) vs. Frequency (V
OUT
= 2.5V
Fixed).
FIGURE 2-26: Power Supply Ripple
Rejection (PSRR) vs. Frequency (V
OUT
= 2.5V
Fixed).
FIGURE 2-27: 2.5V (Adj.) Startup from V
IN
.
FIGURE 2-28: 2.5V (Adj.) Startup from
Shutdown.
FIGURE 2-29: Power Good (PWRGD)
Timing with Cdelay of 1000 pF (2.5V Fixed).
FIGURE 2-30: Power Good (PWRGD)
Timing with C
DELAY
of 0.01 µF (2.5V Fixed).
-80
-70
-60
-50
-40
-30
-20
-10
0
0.01 0.1 1 10 100 1000
Frequency (KHz)
PSRR (dB)
V
R
=2.5V Fixed
C
OUT
=4.7 μF ceramic X7R
V
IN
=3.3V
C
IN
=0 μF
I
OUT
=10 mA
-80
-70
-60
-50
-40
-30
-20
-10
0
0.01 0.1 1 10 100 1000
Frequency (KHz)
PSRR (dB)
V
R
=2.5V Fixed
C
OUT
=22 μF ceramic X7R
V
IN
=3.3V
C
IN
=0 μF
I
OUT
=10 mA