MAX8654(2006) Просмотр технического описания (PDF) - Maxim Integrated
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MAX8654 Datasheet PDF : 17 Pages
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12V, 8A 1.2MHz
Step-Down Regulator
Typical Operating Characteristics
(Typical values are: VIN = VVP = 12V, VOUT = 3.3V, RFREQ = 100kΩ, and TA = +25°C, circuit of Figure 1.)
EFFICIENCY vs. LOAD CURRENT
100
90
80
70
60
VOUT = 1.8V
VOUT = 5V
50
VOUT = 3.3V
40
30
20
10
VIN = 12V, VVDL = VVP = 5V, fS = 500kHz
0
0.1
1
10
OUTPUT CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
100
90
80
70
60
50
VOUT = 1.8V VOUT = 3.3V
40
30
20
10
VIN = VVP = 5V, fS = 500kHz
0
0.1
1
10
OUTPUT CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
100
90 VOUT = 5V
80
70
60
50
VOUT = 3.3V
40
VOUT = 1.8V
30
20
10
VIN = VVP = 12V, fS = 500kHz
0
0.1
1
10
OUTPUT CURRENT (A)
REFERENCE VOLTAGE vs. TEMPERATURE
0.610
0.605
0.600
0.595
0.590
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
LOAD REGULATION
0
VOUT = 3.3V
-0.05
-0.10
-0.15
VOUT = 1.8V
-0.20
-0.25
-0.30
-0.35
0 1 2 3 45 6 78
LOAD CURRENT (A)
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
1200
1000
800
600
400
200
0
5
7
9
11
13
15
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
10
9
8
7
6
5
4
3
2
1
0
0 2 4 6 8 10 12 14
INPUT VOLTAGE (V)
SWITCHING FREQUENCY vs. RFREQ
1400
1200
1000
800
600
400
200
0
0
50
100 150 200 250
RFREQ (kΩ)
CURRENT LIMIT vs. OUTPUT VOLTAGE
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
1.5
.2.0
2.5
3.0
3.5
OUTPUT VOLTAGE (V)
_______________________________________________________________________________________ 5
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