Datasheet

TC1303A/TC1303B/TC1303C/TC1304
DS21949C-page 16 © 2008 Microchip Technology Inc.
Note: Unless otherwise indicated, V
IN1
= V
IN2
= SHDN1,2 = 3.6V, C
OUT1
=C
IN
= 4.7 µF, C
OUT2
=1µF, L =4.7µH,
V
OUT1
(ADJ) = 1.8V, T
A
= +25°C. Boldface specifications apply over the T
A
range of -40°C to +85°C. T
A
= +25°C. Adjustable- or fixed-
output voltage options can be used to generate the Typical Performance Characteristics.
FIGURE 2-31: PG Threshold Voltage vs.
Ambient Temperature.
FIGURE 2-32: PG Output Voltage Level
Low vs. Ambient Temperature.
FIGURE 2-33: PG Output Voltage Level
High vs. Ambient Temperature.
FIGURE 2-34: V
OUT2
Power Supply Ripple
Rejection vs. Frequency.
FIGURE 2-35: V
OUT2
Noise vs. Frequency.
FIGURE 2-36: V
OUT1
Load Step Response
vs. Time.
90
91
92
93
94
95
96
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
PG Threshold (% of V
OUT2
)
SHDN1 = V
IN2
SHDN2 = V
IN2
V
IN
= 3.6V
PG Threshold Hi
PG Threshold Low
0.01
0.012
0.014
0.016
0.018
0.02
-40 -25 -10
5
20 35 50 65 80 95
110 125
Ambient Temperature (°C)
PG V
OL
(V)
V
IN
= 3.6V
I
OL
= 1.2 mA
SHDN1 = V
IN2
SHDN2 = V
IN2
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
PG V
OH
(V)
V
IN
= 3.6V
I
OH
= 500 µA
V
OUT2
= 2.8V
V
OUT2
= 2.5V
V
OUT2
= 1.5V
SHDN1 = V
IN2
SHDN2 = V
IN2
-80
-70
-60
-50
-40
-30
-20
-10
0
0.01 0.1 1 10 100 1000
Frequency (kHz)
V
OUT2
PSRR (dB)
SHDN1 = GND
V
OUT2
= 1.5V
I
OUT2
= 30 mA
C
IN
= 0 µF
C
OUT2
= 1.0 µF
C
OUT2
= 4.7 µF
0.01
0.1
1
10
0.01 0.1 1 10 100 1000 10000
Frequency (kHz)
V
OUT2
Noise (μV/¥Hz)
SHDN1 = A
GND
SHDN2 = V
IN2
V
IN
= 3.6V
V
OUT2
= 2.5V
I
OUT2
= 50 mA