EL7531(2005) 查看數據表（PDF） - Intersil
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EL7531 Datasheet PDF : 10 Pages
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EL7531
Performance Curves and Waveforms
All waveforms are taken at VIN=3.3V, VO=1.8V, IO=1A with component values shown on page 1 at room ambient temperature, unless otherwise
noted.
100
95
VO=3.3V
90
VO=2.5V
85
80
75
VO=1.8V
VO=1.0V
70
VO=1.5V
65
60
VO=0.8V
55
VO=1.2V
50
45
40
0.001
0.010
VIN=5V
0.100
1.000
IO (A)
FIGURE 1. EFFICIENCY vs IO (PFM/PWM MODE)
100
90
VO=3.3V
80
VO=2.5V
70
VO=1.8V
60
VO=1.5V
50
VO=1.2V
40
30
VO=1.0V
20
VO=0.8V
10
0
0.001
VIN=5V
0.010
0.100
IO (A)
1.000
FIGURE 2. EFFICIENCY vs IO (PWM MODE)
100
95 VO=2.5V
90 VO=1.8V
85
80
VO=1.5V
75
VO=1.2V
70
VO=1.0V
65
VO=0.8V
60
55
50
45
40
0.001
0.010
IO (A)
0.100
VIN=3.3V
1.000
FIGURE 3. EFFICIENCY vs IO (PFM/PWM MODE)
100
90
VO=2.5V
80
VO=1.8V
70
VO=1.5V
VO=1.2V
60
50 VO=1.0V
40
30
20
10
0
0.001
VO=0.8V
VIN=3.3V
0.010
0.100
1.000
IO (A)
FIGURE 4. EFFICIENCY vs IO (PWM MODE)
1.44
VIN=5V IO=1A
1.42
VIN=3.3V IO=1A
VIN=5V IO=0A
1.4
VIN=3.3V IO=0A
1.38
1.36
1.34
1.32
-50
0
50
100
150
TA (°C)
FIGURE 5. FS vs JUNCTION TEMPERATURE (PWM MODE)
4
0.1%
0.0%
-0.1%
-0.2%
-0.3%
VIN=3.3V
VIN=5V
-0.4%
-0.5%
0
0.2
0.4
0.6
0.8
1
IO (A)
FIGURE 6. LOAD REGULATIONS (PWM MODE)
FN7428.6
August 5, 2005
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