Datasheet
MCP1825/MCP1825S
DS22056B-page 14 © 2008 Microchip Technology Inc.
Note: Unless otherwise indicated,
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
+ 0.5V, Fixed output.
FIGURE 2-19: Dropout Voltage vs. Load
Current.
FIGURE 2-20: Dropout Voltage vs.
Temperature.
FIGURE 2-21: Short Circuit Current vs.
Input Voltage.
FIGURE 2-22: Output Noise Voltage
Density vs. Frequency.
FIGURE 2-23: Power Supply Ripple
Rejection (PSRR) vs. Frequency (Adj.).
FIGURE 2-24: Power Supply Ripple
Rejection (PSRR) vs. Frequency.
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 100 200 300 400 500
Load Current (mA)
Dropout Voltage (V)
V
OUT
= 5.0V
V
OUT
= 2.5V
0.18
0.20
0.22
0.24
0.26
0.28
0.30
-45 -20 5 30 55 80 105 130
Temperature (°C)
Dropout Voltage (V)
I
OUT
= 500 mA
V
OUT
= 2.5V
V
OUT
= 5.0V
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Input Voltage (V)
Short Circuit Current (A)
V
OUT
= 2.5V
0.01
0.1
1
10
0.01 0.1 1 10 100 1000
Frequency (kHz)
Noise (mV/
√
Hz)
V
R
=0.8V, V
IN
=2.3V
V
R
=2.5V, V
IN
=3.3V C
OUT
=1 μF ce
r
C
IN
=10 μF ce
r
I
OUT
=200 mA
-80.0
-70.0
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
0.01 0.1 1 10 100 1000
Frequency (kHz)
PSRR (dB)
V
R
=1.2V Adj
C
OUT
=10 μF ceramic X7R
V
IN
=2.5V
C
IN
=0 μF
I
OUT
=10 mA
-90.0
-80.0
-70.0
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
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