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.
0.40
10
Temperature = 25°C
COUT=1 μF ceramic X7R
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
VR=2.5V, VIN=3.3V
VR=0.8V, VIN=2.3V
CIN=10 μF ceramic
VOUT = 2.5V
1
0.1
IOUT=200 mA
VOUT = 5.0V
0.01
0.001
0
250
500
750 1000 1250 1500
0.01
0.1
1
10
100
1000
Load Current (mA)
Frequency (kHz)
FIGURE 2-19:
Dropout Voltage vs. Load
FIGURE 2-22:
Output Noise Voltage
Current.
Density vs. Frequency.
0.45
0.40
0.35
0
-10
-20
-30
-40
IOUT = 1.5A
VOUT = 5.0V
VR=1.2V Adj
C
OUT=10 μF ceramic X7R
-50
-60
-70
-80
VIN=3.1V
0.30
0.25
CIN=0 μF
VOUT = 2.5V
IOUT=10 mA
-45
-20
5
30
55
80
105
130
0.01
0.1
1
10
100
1000
Frequency (kHz)
Temperature (°C)
FIGURE 2-20:
Dropout Voltage vs.
FIGURE 2-23:
Power Supply Ripple
Temperature.
Rejection (PSRR) vs. Frequency (V
Adj.).
= 1.2V
OUT
0
-10
-20
-30
3.00
2.50
2.00
1.50
1.00
0.50
0.00
-40
VR=1.2V Adj
-50
-60
-70
-80
C
OUT=22 μF ceramic X7R
VIN=3.1V
IN=0 μF
IOUT=10 mA
C
VOUT = 2.5V
Temperature = 25°C
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0.01
0.1
1
10
100
1000
Frequency (kHz)
Input Voltage (V)
FIGURE 2-21:
Short Circuit Current vs.
FIGURE 2-24:
Power Supply Ripple
Input Voltage.
Rejection (PSRR) vs. Frequency (V
Adj.).
= 1.2V
OUT
© 2007 Microchip Technology Inc.
DS21999B-page 11
MICROCHIP [ MICROCHIP ]
