MAX1779 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
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 = 0°C to +85°C,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Operating Frequency
FBP Regulation Voltage
FBP Input Bias Current
DRVP PCH On-Resistance
VFBP
IFBP
VFBP = +1.5V
0.5 ×
Hz
fOSC
1.20 1.25 1.30
V
-50
50
nA
3
10
Ω
DRVP NCH On-Resistance
FBP Power-Ready Trip Level
VFBP = +1.200V
VFBP = +1.300V
Rising edge
1.5
5
Ω
20
kΩ
1.09 1.13 1.16
V
FBP Fault Trip Level
Falling edge
1.11
V
Maximum RMS DRVP Current
0.1
A
NEGATIVE CHARGE PUMP
VSUPN Input Supply Range
VSUPN
2.7
13
V
Operating Frequency
FBN Regulation Voltage
FBN Input Bias Current
DRVN PCH On-Resistance
DRVN NCH On-Resistance
FBN Power-Ready Trip Level
VFBN
IFBN
VFBN = -0.05V
VFBN = +0.050V
VFBN = -0.050V
Falling edge
0.5 ×
Hz
fOSC
-50
0
50
mV
-50
50
nA
3
10
Ω
1.5
5
Ω
20
kΩ
80
120
165
mV
FBN Fault Trip Level
Rising edge
140
mV
Maximum RMS DRVN Current
REFERENCE
0.1
A
Reference Voltage
Reference Undervoltage
Threshold
LOGIC SIGNALS
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Current
RDY Output Low Voltage
RDY Output High Voltage
VREF
-2µA < IREF < 50µA
VREF rising
0.25V hysteresis (typ)
I SHDN
ISINK = 2mA
V RDY = +13V
1.231 1.25 1.269
V
0.9
1.05
1.2
V
0.9
V
2.1
V
0.01
1
µA
0.25
0.5
V
0.01
1
µA
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