MAX8727(2004) 查看數據表（PDF） - Maxim Integrated
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MAX8727 Datasheet PDF : 13 Pages
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TFT-LCD Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VSHDN = 3V, FREQ = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
CONTROL INPUTS
SHDN, FREQ Input Low Voltage VIN = 2.6V to 5.5V
SHDN, FREQ Input High Voltage VIN = 2.6V to 5.5V
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
MIN TYP MAX UNITS
0.7 ×
VIN
0.3 ×
VIN
V
V
Typical Operating Characteristics
(Circuit of Figure 1. VIN = 5V, VMAIN = 15V, TA = +25°C unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(1.2MHz OPERATION)
100
L = 3.6µH
90
EFFICIENCY vs. LOAD CURRENT
(640kHz OPERATION)
100
L = 6.8µH
90
LOAD REGULATION
0.5
0
80
VIN = 5.0V
70
VIN = 3.3V
60
80
-0.5
VIN = 5.0V
70
-1.0
VIN = 3.3V
60
-1.5
VIN = 5.0V
VIN = 3.3V
50
1
10
100
1000
LOAD CURRENT (mA)
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
1400
1300
1200
FREQ = IN
1100
1000
900
800
700
FREQ = GND
600
500
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
50
1
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5
10
100
1000
LOAD CURRENT (mA)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SWITCHING
NONSWITCHING
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
-2.0
1
10
100
1000
LOAD CURRENT (mA)
SUPPLY CURRENT vs. TEMPERATURE
(SWITCHING)
5
4
VIN = 5.0V
3
VIN = 3.3V
2
1
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
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