Datasheet

MCP1726
DS21936C-page 10 © 2007 Microchip Technology Inc.
NOTE: Unless otherwise indicated, V
IN
= V
OUT
+ 0.5V, I
OUT
= 1 mA and T
A
= +25°C.
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 (V
OUT
= 1.2V
Adj.).
FIGURE 2-24: Power Supply Ripple
Rejection (PSRR) vs. Frequency (V
OUT
= 1.2V
Adj.).
0
25
50
75
100
125
150
175
200
225
250
0 200 400 600 800 1000
Load Current (mA)
Dropout Voltage (mV)
V
OUT
=5.0V
V
OUT
=2.5V
180
190
200
210
220
230
240
250
260
270
-40 -25 -10
5
20 35 50 65 80 95
110 125
Temperature (°C)
Dropout Voltage (mV)
V
OUT
=5.0V
V
OUT
=2.5V
V
OUT
=3.3V
I
OUT
= 1A
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2.3 2.6 2.9 3.2 3.5 3.8 4.1 4.4 4.7 5.0 5.3 5.6 5.9
Input Voltage (V)
Short Circuit Current (A)
V
OUT
=1.2V (Fixed)
0.01
0.1
1
10
0.01 0.1 1 10 100 1000
Frequency (kHz)
Noise (µV

Hz)
V
OUT
=2.5V (Adj)
I
OUT
= 200 mA
V
OUT
=0.8V (Fixed)
I
OUT
= 100 mA
C
OUT
=1 µF
C
IN
= 10 µF
0
10
20
30
40
50
60
70
80
0.01 0.1 1 10 100 1000
Frequency (kHz)
PSRR (dB)
C
OUT
=10 µF
C
IN
= 0 µF
I
OUT
= 100 mA
V
OUT
= 1.2
V
V
IN
= 2.5
V
0
10
20
30
40
50
60
70
80
90
0.01 0.1 1 10 100 1000
Frequency (kHz)
PSRR (dB)
C
OUT
=22 µF
C
IN
= 0 µF
I
OUT
= 100 mA
V
OUT
= 1.2V
V
IN
= 2.5V