MAX1779 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1779 Datasheet PDF : 18 Pages
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Low-Power Triple-Output TFT LCD DC-DC
Converter
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3.0V, SHDN = IN, VSUPP = VSUPN = +10V, TGND = PGND = GND, CREF = 0.22µF, CINTG = 2200pF, 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
0.25V hysteresis (typ)
I SHDN
ISINK = 2mA
V RDY = +13V
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
MIN
MAX UNITS
0.9
V
2.1
V
1
µA
0.5
V
1
µA
Typical Operating Characteristics
(Circuit of Figure 5, VIN = +3.3V, TA = +25°C, unless otherwise noted.)
MAIN OUTPUT VOLTAGE vs. LOAD CURRENT
(L = 10µH, 5V OUTPUT)
5.02
MAIN STEP-UP CONVERTER EFFICIENCY
vs. LOAD CURRENT
(L = 10µH, 5V OUTPUT)
100
MAIN OUTPUT VOLTAGE vs. LOAD CURRENT
(L = 33µH, 5V OUTPUT)
5.02
5.01
VIN = +3.0V
90
VIN = +3.0V
80
VIN = +4.2V
5.01
VIN = +3.0V
5.00
VIN = +4.2V
5.00
VIN = +4.2V
70
4.99
4.99
60
4.98
0
FIGURE 6
50
100
150
200
IMAIN (mA)
50
0
FIGURE 6
50
100
150
200
IMAIN (mA)
4.98
0
FIGURE 5
50 100 150 200 250 300
IMAIN (mA)
MAIN STEP-UP CONVERTER EFFICIENCY
vs. LOAD CURRENT
(L = 33µH, 5V OUTPUT)
100
90
VIN = +3.0V
80
VIN = +4.2V
70
MAIN OUTPUT VOLTAGE vs. LOAD CURRENT
(L = 33µH, 10V OUTPUT)
10.04
10.02
VIN = +3.3V
10.00
VIN = +5.0V
MAIN STEP-UP CONVERTER EFFICIENCY
vs. LOAD CURRENT
(L = 33µH, 10V OUTPUT)
100
90
VIN = +3.3V
80
VIN = +5.5V
70
9.98
60
60
50
0
FIGURE 5
50 100 150 200 250 300
IMAIN (mA)
9.96
0
50
100
IMAIN (mA)
FIGURE 5
150
50
0
50
100
IMAIN (mA)
FIGURE 5
150
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