Datasheet

MCP1790/MCP1791
DS22075B-page 10 © 2010 Microchip Technology Inc.
Note: Unless otherwise indicated, C
OUT
= 4.7 uF Ceramic (X7R), C
IN
= 10.0 µF Ceramic (X7R), I
OUT
= 1 mA, Temperature = +25°C,
V
IN
= 6.0V, R
PWRGD_PULLUP
= 10 kΩ To V
OUT
, V
SHDN
= V
IN,
and device is MCP1790.
FIGURE 2-13: Short Circuit Current vs
Input Voltage.
FIGURE 2-14: Output Noise Voltage
Density vs. Frequency.
FIGURE 2-15: Power Supply Ripple
Rejection vs. Frequency.
FIGURE 2-16: Power Supply Ripple
Rejection vs. Frequency.
FIGURE 2-17: Startup from V
IN
(MCP1791).
FIGURE 2-18: Startup from Shutdown
(MCP1791).
100
105
110
115
120
125
130
6 101418222630
Input Voltage (V)
Short Circuit Current (mA)
R
OUT
< 0.1Ω
V
OUT
= 5.0V
V
OUT
= 3.3V
V
OUT
= 3.0V
0.00
0.01
0.10
1.00
10.00
0.01 0.1 1 10 100 1000
Frequency (kHz)
Noise (μV/Hz)
V
R
=5.0V
I
OUT
=50mA
V
R
=3.3V
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
0.01 0.1 1 10 100 1000
Frequency (kHz)
PSRR (dB)
V
R
=3.3V
V
IN
=7.0V
V
INAC
= 400 mV p-p
C
IN
=0 μF
I
OUT
=10 mA
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
0.01 0.1 1 10 100 1000
Frequency (kHz)
PSRR (dB)
V
R
=5.0V
V
IN
=7.0V
V
INAC
= 400 mV p-p
C
IN
=0 μF
I
OUT
=10 mA