ADP1621 データシートの表示（PDF） - Analog Devices
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ADP1621 Datasheet PDF : 32 Pages
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ADP1621
TYPICAL PERFORMANCE CHARACTERISTICS
100
90
80
70
60
50
40
30
0.01
TA = 25°C
fSW = 220kHz
VIN = 3.3V
VOUT = 5V
0.1
1
10
LOAD CURRENT (A)
Figure 5. Efficiency vs. Load Current
92
91
LOAD = 0.5A
90
89
LOAD = 1A
88
87
86
85
84
100
TA = 25°C
VIN = 3.3V
VOUT = 5V
300 500 700 900 1100 1300 1500
SWITCHING FREQUENCY (kHz)
Figure 8. Efficiency vs. Switching Frequency
TA = 25°C
VIN = 3.3V
VOUT = 5V
LOAD = 1A
1
VOUT RIPPLES @ 5V
AC-COUPLED
2
CH2 = GATE
CH1 20mV CH2 2V
M2µs
A CH2 2.6V
Figure 6. Output Voltage Ripple of the Circuit Shown in Figure 1
100
10
IIN
1
0.1
IPIN
0.01
0.001
0.0001
0.00001
0
TA = 25°C
NO SWITCHING
1
2
3
4
5
6
7
SUPPLY VOLTAGE (V)
Figure 9. Supply Current vs. Supply Voltage
1.21605
TA = 25°C
1.21600
1.21595
1.21590
1.21585
1.21580
2.5
TA = 25°C
VIN = 5V
2.0
1.5
1.0
0.5
1.21575
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VIN (V)
Figure 7. VFB vs. VIN
0
1.17
1.19
1.21
1.23
1.25
1.27
1.29
VFB (V)
Figure 10. VCOMP vs. VFB
Rev. A | Page 8 of 32
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