MAX618EEE(1999) 查看數據表（PDF） - Maxim Integrated
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MAX618EEE Datasheet PDF : 14 Pages
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28V, PWM, Step-Up DC-DC Converter
(Circuit of Figure 1, TA = +25°C.)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
0.65
0.60
0.55
0.50
0.45
0.40
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
MEDIUM-LOAD SWITCHING
WAVEFORMS
MAX618 toc07
Typical Operating Characteristics (continued)
SUPPLY CURRENT vs. TEMPERATURE
700
VIN = 3V
650
600
550
VIN = 5V
500
VIN = 8V
450
400
350
300
-50
INCLUDES CAPACITOR LEAKAGE CURRENT
-30 -10 10 30 50 70 90 110
TEMPERATURE (°C)
HEAVY-LOAD SWITCHING
WAVEFORMS
MAX618 toc08
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2 7 12 17 22 27 32
SUPPLY VOLTAGE (V)
LINE-TRANSIENT RESPONSE
MAX618 toc09
IL
(1A/div)
VLX
(10V/div)
IL
(1A/div)
0
VLX
(10V/div)
VOUT
(50mV/div)
0
VOUT
(100mV/div)
2µs/div
VIN = 5V, VOUT = 12V, IOUT = 200mA
VOUT
(200mV/div)
LOAD-TRANSIENT RESPONSE
MAX618 toc10
VOUT
(100mV/
div)
2µs/div
VIN = 5V, VOUT = 12V, IOUT = 500mA
SHUTDOWN RESPONSE
MAX618 toc11
SHDN
(2V/div)
0
IOUT
(100mA/div)
5ms/div
VIN = 5V, VOUT = 12V
12V
0
VOUT
(2V/div)
5V
500µs/div
VIN = 5V, VOUT = 12V, ILOAD = 500mA
VIN
6V
(5V/div)
3V
2ms/div
IOUT = 200mA, VOUT = 12V
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
1.6
VOUT = 12V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2 3 4 5 6 7 8 9 10 11 12
INPUT VOLTAGE (V)
4 _______________________________________________________________________________________
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