MAX1733 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1733 Datasheet PDF : 8 Pages
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Low-Voltage, Step-Down DC-DC Converters
in SOT23
Typical Operating Characteristics
(CIN = 2.2µF ceramic, COUT = 22µF tantalum, L = 10µH, unless otherwise noted.)
EFFICIENCY vs.
LOAD CURRENT (VOUT = 1.8V)
100
VIN = 2.7V
90
80
70
VIN = 5.0V
VIN = 3.6V
60
50
40
30
0.1
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs.
LOAD CURRENT (VOUT = 1.5V)
100
90 VIN = 2.7V
80
70
VIN = 5.0V
VIN = 3.6V
60
50
40
30
0.1
1
10
100
1000
LOAD CURRENT (mA)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
62
60
VOUT = 1.8V, TA = +85°C
58 VOUT = 1.8V, TA = +25°C
56
54
52
50
VOUT = 1.5V, TA = +25°C
48
VOUT = 1.5V, TA = -40°C
46
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
OUTPUT ACCURACY vs.
LOAD CURRENT (VOUT = 1.8V)
3.0
2.0
VIN = 3.6V, TA = +85°C
1.0 VIN = 2.7V, TA = +25°C
0
-1.0
-2.0 VIN = 5.0V, TA = +25°C
VIN = 3.6V, TA = -40°C
-3.0
0.1
1
10
100
1000
LOAD CURRENT (mA)
OUTPUT ACCURACY vs.
LOAD CURRENT (VOUT = 1.5V)
3.0
2.0
VIN = 3.6V, TA = +85°C
VIN = 5.0V, TA = +25°C
1.0
0
-1.0
-2.0
VIN = 2.7V, TA = +25°C
VIN = 3.6V, TA = -40°C
-3.0
0.1
1
10
100
1000
LOAD CURRENT (mA)
SWITCHING FREQUENCY
vs. SUPPLY VOLTAGE
1.50
ILOAD = 50mA TO 250mA
1.25
1.00
VOUT = 1.8V
0.75
VOUT = 1.5V
0.50
2.7 3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1733/4-07
VIN = 3.6V, VOUT = 1.8V, ILOAD = 20mA
VOUT
AC-COUPLED
20mV/div
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1733/4-08
VIN = 3.6V, VOUT = 1.8V, ILOAD = 200mA
VOUT
AC-COUPLED
20mV/div
VLX
2V/div
VLX
2V/div
400ns/div
400ns/div
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