AIC1620/AIC1621/AIC1622
n
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
100
1.8
1.6
90
80
Start-up Voltage (V)
1.4
1.2
1.0
0.8
0.6
0.4
Efficiency (%)
V
IN
=2.4V
70
Without Diode
V
IN
=1.2V
60
With Diode
50
0.2
40
0.01
0.1
1
10
100
1000
0.0
0.01
0.1
1
10
100
Loading (mA)
Fig. 3 V
OUT
=3.3V CLSEL=GND (0.45A)
0.10
0.08
2.2
2.0
Load Current (mA)
Fig. 4 Start-up Voltage vs. Load Current
Shutdown Current (µA)
0.06
0.04
0.02
0.00
-0.02
-0.04
-0.06
-0.08
-0.10
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Shutdown Threshold (V)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Fig. 5
800
V
OUT
(V)
Shutdown Current vs. V
OUT
Output Voltage (V)
Fig. 6
Shutdown Threshold vs. Output Voltage
Maximum Output Current (mA)
700
600
V
OUT
=3.3V
CLSEL=OUT
LX pin waveform
500
400
300
200
100
0
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
V
OUT
AC Couple
CLSEL=GND
Inductor Current
V
IN
=2.4V
V
OUT
=3.3V
Input Voltage (V)
Fig. 7
Maximum Output Current vs. Input Voltage
Fig. 8 Heavy Load Waveform
5
AIC [ ANALOG INTERGRATIONS CORPORATION ]
