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
(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
Input Supply Range
Input Undervoltage Threshold
IN Quiescent Supply Current
SUPP Quiescent Current
SUPN Quiescent Current
IN Shutdown Current
SUPP Shutdown Current
SUPN Shutdown Current
MAIN BOOST CONVERTER
Output Voltage Range
FB Regulation Voltage
FB Input Bias Current
Operating Frequency
Oscillator Maximum Duty Cycle
LX Switch On-Resistance
LX Leakage Current
LX Current Limit
FB Fault Trip Level
POSITIVE CHARGE PUMP
SUPP Input Supply Range
FBP Regulation Voltage
FBP Input Bias Current
DRVP PCH On-Resistance
DRVP NCH On-Resistance
FBP Power-Ready Trip Level
NEGATIVE CHARGE PUMP
SUPN Input Supply Range
FBN Regulation Voltage
FBN Input Bias Current
DRVN PCH On-Resistance
DRVN NCH On-Resistance
FBN Power-Ready Trip Level
REFERENCE
Reference Voltage
Reference Undervoltage
SYMBOL
VIN
VUVLO
IIN
ISUPP
ISUPN
CONDITIONS
VIN rising, 40mV hysteresis (typ)
VFB = VFBP = +1.5V, VFBN = -0.2V
VFBP = +1.5V
VFBN = -0.1V
V SHDN = 0, VIN = +5V
V SHDN = 0, VSUPP = +13V
V SHDN = 0, VSUPN = +13V
VMAIN
VFB
IFB
fOSC
VFB = +1.25V, INTG = GND
RLX(ON)
ILX
ILIM
ILX = 100mA
VLX = +13V
Falling edge
VSUPP
VFBP
IFBP
VFBP = +1.5V
VFBP = +1.200V
VFBP = +1.300V
Rising edge
VSUPN
VFBN
IFBN
VFBN = -0.05V
VFBN = +0.050V
VFBN = -0.050V
Falling edge
VREF
-2µA < IREF < 50µA
VREF rising
MIN
2.7
2.2
VIN
1.225
-50
195
79
350
1.07
2.7
1.20
-50
20
1.09
2.7
-50
-50
20
80
1.223
0.9
MAX
5.5
2.6
1
0.55
0.55
10
10
10
UNITS
V
V
mA
mA
mA
µA
µA
µA
13
V
1.271
V
50
nA
305
kHz
92
%
2.0
Ω
20
µA
700
mA
1.14
V
13
V
1.30
V
50
nA
10
Ω
5
Ω
kΩ
1.16
V
13
V
50
mV
50
nA
10
Ω
5
Ω
kΩ
165
mV
1.269
V
1.2
V
4 _______________________________________________________________________________________
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