MAX8667 データシートの表示（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 (continued)
(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.)
NO-LOAD SUPPLY CURRENT vs. SUPPLY
VOLTAGE OUT3 AND OUT4 ONLY
120
VIN12 = 5.5V
100
80
60
VIN34 VOLTAGE
FALLING
40
20
VIN34 VOLTAGE
RISING
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
OUT3 OUTPUT VOLTAGE
vs. INPUT VOLTAGE (300mA LOAD)
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
2.55
2.50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
OUT3 DROPOUT VOLTAGE
vs. LOAD CURRENT
80
70
60
50
40
30
20
10
0
0
100
200
300
LOAD CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
1000
900
IN12 = IN34
2.4Ω LOAD ON OUT1
800
3.6Ω LOAD ON OUT2
700
NO LOAD ON OUT3
NO LOAD ON OUT4
600
500
400
300
200
100
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
EN1/EN2/
EN3/EN4
VOUT1
VOUT2
VOUT3
VOUT4
IL1
IL2
IIN12 + IIN34
ENABLE WAVEFORMS
MAX8667/88 toc14
5V/div
2V/div
2V/div
2V/div
2V/div
40µs/div
2A/div
2A/div
2A/div
EN1/EN2/
EN3/EN4
VOUT1
VOUT2
VOUT3
VOUT4
SHUTDOWN WAVEFORMS
MAX8667/88 toc15
5V/div
1V/div
1V/div
OUT1 LOAD TRANSIENT
MAX8667/88 toc16
VOUT1
IOUT1
10mA
300mA
10mA
100mV/div
(AC-COUPLED)
200mA/div
40µs/div
1V/div
1V/div
IL1
200mA/div
10µs/div
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