Datasheet
© 2008 Microchip Technology Inc. DS21949C-page 11
TC1303A/TC1303B/TC1303C/TC1304
2.0 TYPICAL PERFORMANCE CURVES
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 2-1: I
Q
Switcher and LDO
Current vs. Ambient Temperature (TC1303A,B).
FIGURE 2-2: I
Q
Switcher and LDO
Current vs. Ambient Temperature
(TC1303C, TC1304).
FIGURE 2-3: I
Q
Switcher Current vs.
Ambient Temperature.
FIGURE 2-4: I
Q
LDO Current vs. Ambient
Temperature.
FIGURE 2-5: V
OUT1
Output Efficiency vs.
Input Voltage (V
OUT1
= 1.2V).
FIGURE 2-6: V
OUT1
Output Efficiency vs.
I
OUT1
(V
OUT1
= 1.2V).
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
60
64
68
72
76
80
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
I
Q
Switcher and LDO (µA)
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
I
OUT1
= I
OUT2
= 0 mA SHDN1 = V
IN2
SHDN2 = V
IN2
66
68
70
72
74
76
78
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
I
Q
Switcher and LDO (µA)
V
IN
= 5.5V
SHDN1 = V
IN2
SHDN2 = V
IN2
V
IN
= 4.2V
V
IN
= 3.6V
30
35
40
45
50
55
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
I
Q
Switcher (µA)
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
I
OUT1
= 0 mA
SHDN1 = V
IN2
SHDN2 = A
GND
30
35
40
45
50
55
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
I
Q
LDO (µA)
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
I
OUT2
= 0 mA
SHDN1 = A
GND
SHDN2 = V
IN2
50
55
60
65
70
75
80
85
90
95
100
2.7 3.05 3.4 3.75 4.1 4.45 4.8 5.15 5.5
Input Voltage (V)
V
OUT1
Efficiency (%)
I
OUT1
= 100 mA
I
OUT1
= 250 mA
I
OUT1
= 500 mA
SHDN1 = V
IN2
SHDN2 = A
GND
70
75
80
85
90
95
100
0.005 0.104 0.203 0.302 0.401 0.5
I
OUT1
(A)
V
OUT1
Efficiency(%)
V
IN1
= 3.0V
V
IN1
= 4.2V
V
IN1
= 3.6V
SHDN1 = V
IN2
SHDN2 = A
GND