MAX8561 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8561 Datasheet PDF : 12 Pages
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4MHz, 500mA Synchronous Step-Down
DC-DC Converters in Thin SOT and TDFN
Typical Operating Characteristics (continued)
(VIN = 3.6V, VOUT = 1.2V, L = 1µH (LQH32CN1R0M53), COUT = 2.2µF, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 1.2V)
100
90
4.7µH
80
70
2.2µH
1µH
60
50
40
0.1
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 0.9V)
100
90
4.7µH
80
70
2.2µH
1µH
60
50
40
0.1
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(LOAD = 7.5Ω)
100
90
4.7µH
80
2.2µH
1µH
70
60
50
40
0.5
1.0
1.5
2.0
2.5
OUTPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
47
46
45
44
43
42
41
40
R1 = R2 = 100kΩ
39
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
SWITCHING FREQUENCY
vs. LOAD CURRENT
10
1µH
2.2µH
1
4.7µH
0.1
0
100 200 300 400 500
LOAD CURRENT (mA)
OUTPUT VOLTAGE vs. LOAD CURRENT
(VOLTAGE POSITIONING)
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
0
R1 = R2 = 100kΩ
100 200 300 400 500
LOAD CURRENT (mA)
LIGHT-LOAD SWITCHING WAVEFORMS
MAX8560 toc10
50mA LOAD
VOUT
20mV/div
IL
200mA/div
0
HEAVY-LOAD SWITCHING WAVEFORMS
MAX8560 toc11
200mA LOAD
VOUT
20mV/div
IL
200mA/div
0
VLX
2V/div
VLX
2V/div
200ns/div
200ns/div
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