AIC1550
ꢀTYPICAL PERFORMANCE CHARACTERISTICS (continued)
300
250
200
150
100
50
100
90
80
70
60
50
40
30
20
10
V
=1.8V
OUT
PWM/PFM
SYNC/PWM=IN
PWM
SYNC/PWM=GND
V
V
=3.6V
IN
=1.8V
OUT
0
2.5
3.0
3.5
4.0
Supply Voltage (V)
Fig. 13 DC Supply Current vs. Supply Voltage
4.5
5.0
5.5
6.0
6.5
7.0
0.1
1
10
Load current (mA)
100
1000
Fig. 14 Efficiency vs. Load current
1000
900
800
700
600
500
2250 2000 1750 1500 1250 1000 750
Tuning Resistor R (k
500
250
)
Ω
T
Fig. 15 Operation Frequency vs. Tuning Resistor
Fig. 16 Start-up from Shutdown, RLOAD=3
Ω
VOUT=1.8V;
VOUT=1.8V;
LOAD=50mA to 500mA;
ILOAD=50mA to 500mA;
SYNC/MODE=GND
I
SYNC/MODE=IN
Fig. 18 Load Transient Response
Fig. 17 Load Transient Response
7
AIC [ ANALOG INTERGRATIONS CORPORATION ]
