Datasheet

ADP1621 Data Sheet
Rev. B | Page 8 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
100
30
0.01 10
LOAD CURRENT (A)
EFFICIENCY (%)
90
80
70
60
50
40
0.1 1
T
A
= 25°C
f
SW
= 220kHz
V
IN
= 3.3V
V
OUT
= 5V
06090-004
Figure 5. Efficiency vs. Load Current
CH1 20mV CH2 2V M2µs A CH2 2.6V
1
2
T
A
= 25°C
V
IN
= 3.3V
V
OUT
= 5V
LOAD = 1A
V
OUT
RIPPLES @ 5V
AC-COUPLED
CH2 = GATE
06090-005
Figure 6. Output Voltage Ripple of the Circuit Shown in Figure 1
1.21605
1.21575
2.5 6.0
V
IN
(V)
V
FB
(V)
T
A
= 25°C
1.21600
1.21595
1.21590
1.21585
1.21580
3.0 3.5 4.0 4.5 5.0 5.5
06090-006
Figure 7. V
FB
vs. V
IN
92
84
100
SWITCHING FREQUENCY (kHz)
EFFICIENCY (%)
91
90
89
88
87
86
85
300 500
700 900 1100 1300 1500
T
A
= 25°C
V
IN
= 3.3V
V
OUT
= 5V
LOAD = 1A
LOAD = 0.5A
06090-007
Figure 8. Efficiency vs. Switching Frequency
100
0.00001
0 7
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= 25°C
NO SWITCHING
10
1
0.1
0.01
0.001
0.0001
1 2 3 4 5 6
I
IN
I
PIN
06090-008
Figure 9. Supply Current vs. Supply Voltage
2.5
0
1.17 1.29
V
FB
(V)
V
COMP
(V)
T
A
= 25°C
V
IN
= 5V
2.0
1.5
1.0
0.5
1.19 1.21 1.23 1.25 1.27
06090-009
Figure 10. V
COMP
vs. V
FB