MAX1889 データシートの表示（PDF） - Maxim Integrated
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MAX1889 Datasheet PDF : 32 Pages
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Triple-Output TFT LCD Power Supply
with Fault Protection
ELECTRICAL CHARACTERISTICS
(VIN = 3V, SHDN = IN, CREF = 0.22µF, PGND = GND, TA = -40°C to +85°C.) (Note 4)
PARAMETER
SYMBOL
CONDITIONS
IN Supply Range
IN ULVO Threshold
IN Quiescent Current
IN Shutdown Current
REF Output Voltage
MAIN STEP-UP REGULATOR
VIN
VUVLO
IIN
VREF
VIN rising
VIN falling
VFB = VFBP = 1.5V, VFBN = 0V (Note 1)
V SHDN = 0, VIN = 5V
-2µA < IREF < 50µA
Main Output Voltage Range
Operating Frequency
Oscillator Maximum Duty Cycle
VMAIN
fOSC
VFREQ = VIN
FB Regulation Voltage
VFB
ILX = 200mA, slope = 0 (Note 2)
FB Fault Trip Level
VFB falling
Line Regulation
VIN = 2.7V to 5.5V
FB Input Bias Current
IFB
VFB = 1.5V
LX Switch On-Resistance
RLX(ON)
LX Current Limit
ILIM
POSITIVE LINEAR-REGULATOR CONTROLLER
FBP Regulation Voltage
FBP Fault Trip Level
FBP Input Bias Current
FBP Effective Transconductance
Bandwidth
VFBP
IFBP
IDRVP = 0.2mA
VFBP falling
VFBP = 1.25V
VDRVP = 10V, IDRVP = 0.1mA to 2mA
(Note 2)
DRVP Sink Current
IDRVP VFBP = 1.1V, VDRVP = 10V
NEGATIVE LINEAR-REGULATOR CONTROLLER
FBN Regulation Voltage
FBN Fault Trip Level
FBN Input Bias Current
FBN Effective Transconductance
Bandwidth
VFBN
IFBN
IDRVN = 0.2mA
VFBN rising
VFBN = 0V
VDRVN = -10V, IDRVN = 0.1mA to 2mA
(Note 2)
DRVN Sink Current
LOGIC SIGNAL (SHDN)
IDRVN VFBN = 200mV, VDRVN = -10V
Input Low Voltage
100mV typical hysteresis
Input High Voltage
Input Current
ISHDN
MIN
2.7
2.55
2.2
1.231
VIN
0.75
78
1.215
0.96
-100
1.6
1.213
0.96
-50
60
200
5
95
325
-50
60
200
5
1.6
MAX
5.5
2.85
2.5
1.0
1.0
1.269
UNITS
V
V
mA
µA
V
13
1.25
92
1.260
1.04
0.45
+100
450
2.8
V
MHz
%
V
V
%/V
nA
mΩ
A
1.288
V
1.04
V
+50
nA
mS
kHz
mA
155
mV
475
mV
+50
nA
mS
kHz
mA
0.4
V
V
1
µA
4 _______________________________________________________________________________________
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