MAX1927 Ver la hoja de datos (PDF) - Maxim Integrated
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Fabricante
MAX1927 Datasheet PDF : 12 Pages
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Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
(Circuits of Figure 3 and 4, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
MAX1927R
EFFICIENCY vs. LOAD CURRENT
100
VIN = 3.6V
90
80
70
VIN = 5V
60
50
40
1
VOUT = 3.3V
10
100
1000
LOAD CURRENT (mA)
MAX1928-15
EFFICIENCY vs. LOAD CURRENT
100
VIN = 2.7V
90
80
70
VIN = 5V
60
VIN = 3.6V
50
40
30
1
VOUT = 1.5V
10
100
1000
LOAD CURRENT (mA)
MAX1928-18
OUTPUT VOLTAGE vs. LOAD CURRENT
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
VIN = 3.6V
1.70
0 100 200 300 400 500 600 700 800 900 1000
LOAD CURRENT (mA)
MAX1928-25
EFFICIENCY vs. LOAD CURRENT
100
90
VIN = 3.6V
80
70
VIN = 5V
60
50
40
1
10
100
1000
LOAD CURRENT (mA)
MAX1927R
EFFICIENCY vs. LOAD CURRENT
100
90
VIN = 2.7V
80
70
VIN = 5V
60
VIN = 3.6V
50
40
30
1
VOUT = 1V
10
100
1000
LOAD CURRENT (mA)
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
400
350
300
250
200
150
100
50
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
MAX1928-18
EFFICIENCY vs. LOAD CURRENT
100
90
VIN = 2.7V
80
VIN = 3.6V
70
60
VIN = 5V
50
40
30
1
VOUT = 1.8V
10
100
1000
LOAD CURRENT (mA)
MAX1928-25
DROPOUT VOLTAGE vs. LOAD CURRENT
500
450
400
350
300
250
200
150
100
50
0
0
VIN = 2.5V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
OSCILLATOR FREQUENCY
vs. INPUT VOLTAGE
1.06
TA = +85°C
1.04
1.02
1.00
TA = +25°C
0.98
0.96
TA = -40°C
0.94
2.6 3.1 3.6 4.1 4.6 5.1 5.6
INPUT VOLTAGE (V)
_______________________________________________________________________________________ 5
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