MAX5082 查看數據表（PDF） - Maxim Integrated
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MAX5082 Datasheet PDF : 18 Pages
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1.5A, 40V, MAXPower Step-Down
DC-DC Converters
Typical Operating Characteristics (continued)
(VIN = 12V, see Figure 5 (MAX5082) and Figure 6 (MAX5083), TA = +25°C, unless otherwise noted.)
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE (MAX5083)
100
98
96
94
92
90
88
86
84
82
80
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
OPEN-LOOP GAIN/PHASE vs. FREQUENCY
MAX5082 toc10
100
175
80
60
40
20
PHASE
0
GAIN
150
125
100
75
-20
50
0 0.001 0.01 0.1 1 10 100 1000 10,000
FREQUENCY (kHz)
OUTPUT CURRENT LIMIT
vs. INPUT VOLTAGE
3.0
MAX5082
2.9
2.8
TA = +25°C
TA = -40°C
2.7
2.6
2.5
TA = +135°C
2.4
TA = +85°C
2.3
2.2
OUTPUT IS
2.1 PULSED WITH 3% DUTY CYCLE
2.0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
TURN-ON/OFF WAVEFORM
MAX5082/3 toc11a
ILOAD = 1A
VON/OFF
2V/div
TURN-ON/OFF WAVEFORM
MAX5082/3 toc11b
ILOAD = 100mA
VON/OFF
2V/div
VOUT
2V/div
VOUT
2V/div
2ms/div
2ms/div
OUTPUT VOLTAGE vs. TEMPERATURE
3.40
MAX5082
3.38
3.36
3.34
ILOAD = 0A
3.32
3.30
3.28
3.26
ILOAD = 1A
3.24
3.22
3.20
-40 -15 10 35 60 85 110 135
TEMPERATURE (°C)
EFFICIENCY vs. LOAD CURRENT
100
VIN = 4.5V,
90 VOUT = 3.3V
80
70
60
50
40
30
20
0
0.001
VIN = 7.5V,
VOUT = 3.3V
VIN = 12V,
VOUT = 3.3V
VIN = 24V,
VOUT = 3.3V
VIN = 40V,
VOUT = 3.3V
MAX5082
0.01
0.1
1
10
LOAD CURRENT (A)
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