MCP1727 Datasheet, PDF (11/32 Pages) Microchip Technology – 1.5A, Low Voltage, Low Quiescent Current LDO Regulator

MCP1727
NOTE: Unless otherwise indicated V_OUT = 1.8V (Adjustable), V_IN = 2.8V, 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 + 0.6V, RPWRGD = 10 kΩ To V_IN.
0.40
Temperature = 25°C
0.35
0.30
V_OUT = 2.5V
0.25
0.20
V_OUT = 5.0V
0.15
0.10
0.05
0.00
0
250 500 750 1000 1250 1500
Load Current (mA)
FIGURE 2-19:
Current.
Dropout Voltage vs. Load
10
V_R=2.5V, V_IN=3.3V
1
V_R=0.8V, V_IN=2.3V
0.1
C_OUT=1 μF ceramic X7R
C_IN=10 μF ceramic
I_OUT=200 mA
0.01
0.001
0.01
0.1
1
10
100
Frequency (kHz)
1000
FIGURE 2-22:
Output Noise Voltage
Density vs. Frequency.
0.45
0.40
I_OUT = 1.5A
0.35
V_OUT = 5.0V
0.30
0.25
-45
V_OUT = 2.5V
-20 5 30 55 80
Temperature (°C)
105 130
FIGURE 2-20:
Temperature.
Dropout Voltage vs.
0
-10
-20
-30
-40
-50
-60
-70
-80
0.01
V_R=1.2V Adj
C_OUT=10 μF ceramic X7R
V_IN=3.1V
C_IN=0 μF
I_OUT=10 mA
0.1
1
10
100
Frequency (kHz)
1000
FIGURE 2-23:
Power Supply Ripple
Rejection (PSRR) vs. Frequency (V_OUT = 1.2V
Adj.).
3.00
2.50
2.00
1.50
1.00
0.50
V_OUT = 2.5V
Temperature = 25°C
0.00
3.0 3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage (V)
FIGURE 2-21:
Input Voltage.
Short Circuit Current vs.
0
-10
-20
-30
-40
-50
-60
-70
-80
0.01
V_R=1.2V Adj
C_OUT=22 μF ceramic X7R
V_IN=3.1V
C_IN=0 μF
I_OUT=10 mA
0.1
1
10
100
Frequency (kHz)
1000
FIGURE 2-24:
Power Supply Ripple
Rejection (PSRR) vs. Frequency (V_OUT = 1.2V
Adj.).
© 2007 Microchip Technology Inc.
DS21999B-page 11