MAX1748 查看數據表（PDF） - Maxim Integrated
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MAX1748 Datasheet PDF : 16 Pages
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Triple-Output TFT-LCD
DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3.0V, SHDN = IN, VSUPP = VSUPN = 10V, TGND = PGND = GND, CREF = 0.22µF, CINTG = 470pF, TA = -40°C to +85°C,
unless otherwise noted.) (Note 1)
PARAMETER
LOGIC SIGNALS
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Current
RDY Output Low Voltage
RDY Output High Leakage
SYMBOL
CONDITIONS
0.45V hysteresis (typ)
I SHDN
ISINK = 2mA
V RDY = 13V
MIN
MAX UNITS
0.9
V
2.1
V
1
µA
0.5
V
1
µA
Note 1: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuit of Figure 5, VIN = 3.3V, TA = +25°C, unless otherwise noted.)
10.04
10.02
10.00
9.98
9.96
9.94
9.92
9.90
9.88
9.86
9.84
0
MAIN OUTPUT VOLTAGE
vs. LOAD CURRENT
VIN = 3.3V
VIN = 5.0V
100 200 300 400 500 600
IMAIN (mA)
MAIN STEP-UP CONVERTER
EFFICIENCY vs. LOAD CURRENT
(BOOST ONLY)
100
VMAIN = 10V
95
90
VIN = 5.0V
85
VIN = 3.3V
80
75
70
65
60
0
100 200 300 400 500 600
IMAIN (mA)
MAIN STEP-UP CONVERTER
EFFICIENCY vs. LOAD CURRENT
(BOOST ONLY)
100
VMAIN = 8V
95
90
VIN = 5.0V
85
VIN = 3.3V
80
75
70
65
60
0 100 200 300 400 500 600 700 800
IMAIN (mA)
EFFICIENCY vs. LOAD CURRENT
(BOOST CONVERTER AND CHARGE PUMPS)
90
85
VMAIN = 8V
80
VMAIN = 10V
75
70
65
60
VIN = 3.3V
55
VNEG = -5V WITH INEG = 10mA
VPOS = 15V WITH IPOS = 5mA
50
0 50 100 150 200 250 300 350 400
IMAIN (mA)
NEGATIVE CHARGE-PUMP OUTPUT
VOLTAGE vs. LOAD CURRENT
-4.60
VNEG = -5V
-4.65
-4.70
-4.75
VSUPN = 6V
-4.80
-4.85
-4.90
-4.95
-5.00
VSUPN = 8V
VSUPN = 10V
-5.05
0
5 10 15 20 25 30 35 40
INEG (mA)
NEGATIVE CHARGE-PUMP EFFICIENCY
vs. LOAD CURRENT
80
VSUPN = 6V
70
VSUPN = 8V
60
50
VSUPN = 10V
40
30
20
0
VNEG = -5V
5 10 15 20 25 30 35 40
INEG (mA)
_______________________________________________________________________________________ 5
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