MAX8667 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8667 Datasheet PDF : 18 Pages
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1.5MHz Dual Step-Down DC-DC Converters
with Dual LDOs and Individual Enables
Typical Operating Characteristics
(VIN12 = VIN34 = 3.6V, circuit of Figure 4, VOUT1 = 1.2V, VOUT2 = 1.8V, VOUT3 = 2.8V, VOUT4 = 2.8V, TA = +25°C, unless otherwise noted.)
OUT1 EFFICIENCY vs. LOAD CURRENT
(VOUT1 = 1.2V)
90
80
70
60
50
40
30
20
10
0
0.1
ONLY OUT1 ENABLED
1
10
100
1000
LOAD CURRENT (mA)
OUT2 LOAD REGULATION
1.90
1.80
1.70
1.60
1.50
1.40
1.30
1.20
0
200 400 600 800 1000 1200
LOAD CURRENT (mA)
SWITCHING FREQUENCY
vs. LOAD CURRENT
3500
3000
2500
2000
OUT2
1500
1000
500
OUT1
0
0 300 600 900 1200 1500 1800
LOAD CURRENT (mA)
OUT2 EFFICIENCY vs. LOAD CURRENT
(VOUT2 = 1.8V)
90
80
70
60
50
40
30
20
10
0
0.1
ONLY OUT2 ENABLED
1
10 100 1000 10000
LOAD CURRENT (mA)
OUT1 OUTPUT VOLTAGE
vs. INPUT VOLTAGE (600mA LOAD)
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENT vs. SUPPLY
VOLTAGE ALL REGULATOR ENABLED
120
100
80
SUPPLY VOLTAGE
60
RISING
40
SUPPLY VOLTAGE
FALLING
20
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
0
OUT1 LOAD REGULATION
100 200 300 400 500 600
LOAD CURRENT (mA)
OUT2 OUTPUT VOLTAGE
vs. INPUT VOLTAGE (1200mA LOAD)
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE OUT1 AND OUT2 ONLY
120
100
SUPPLY VOLTAGE
80 FALLING
60
SUPPLY VOLTAGE
40
RISING
20
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
4 _______________________________________________________________________________________
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