Datasheet

TC1303A/TC1303B/TC1303C/TC1304
DS21949C-page 12 © 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 2-7: V
OUT1
Output Efficiency vs.
Input Voltage (V
OUT1
= 1.8V).
FIGURE 2-8: V
OUT1
Output Efficiency vs.
I
OUT1
(V
OUT1
= 1.8V).
FIGURE 2-9: V
OUT1
Output Efficiency vs.
Input Voltage (V
OUT1
= 3.3V).
FIGURE 2-10: V
OUT1
Output Efficiency vs.
I
OUT1
(V
OUT1
= 3.3V).
FIGURE 2-11: V
OUT1
vs. I
OUT1
(V
OUT1
= 1.2V).
FIGURE 2-12: V
OUT1
vs. I
OUT1
(V
OUT1
= 1.8V).
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
75
80
85
90
95
100
0.005 0.104 0.203 0.302 0.401 0.5
I
OUT1
(A)
V
OUT1
Efficiency(%)
SHDN1 = V
IN2
SHDN2 = A
GND
V
IN
= 3.0V
V
IN
= 4.2V
V
IN
= 3.6V
80
84
88
92
96
100
3.60 3.92 4.23 4.55 4.87 5.18 5.50
Input Voltage (V)
V
OUT1
Efficiency (%)
I
OUT1
= 100 mA
I
OUT1
= 250 mA
I
OUT1
= 500 mA
SHDN1 = V
IN2
SHDN2 = A
GND
60
65
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
= 5.5V
SHDN1 = V
IN2
SHDN2 = A
GND
V
IN1
= 4.2V
V
IN1
= 3.6V
1.19
1.194
1.198
1.202
1.206
1.21
0.005 0.104 0.203 0.302 0.401 0.5
I
OUT1
(A)
V
OUT1
(V)
SHDN1 = V
IN2
SHDN2 = A
GND
V
IN1
= 3.6V
1.79
1.795
1.8
1.805
1.81
1.815
1.82
0.005 0.104 0.203 0.302 0.401 0.5
I
OUT1
(A)
V
OUT1
(V)
SHDN1 = V
IN2
SHDN2 = A
GND
V
IN1
= 3.6V