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MAX1997 Datasheet(PDF) 5 Page - Maxim Integrated Products

Part # MAX1997
Description  Quintuple/Triple-Output TFT LCD Power Supplies with Fault Protection and VCOM Buffer
PDF  31 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1997 Datasheet(HTML) 5 Page - Maxim Integrated Products

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Quintuple/Triple-Output TFT LCD Power Supplies
with Fault Protection and VCOM Buffer
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS
(VIN = 3V, VDDB = 10V, SHDN = ONDC = FREQ = IN, CREF = 0.22µF, PGND = GND, TA = -40°C to +85°C, unless otherwise noted.)
(Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IN Supply Range
2.7
5.5
V
VIN rising
2.5
2.9
IN Undervoltage Lockout Threshold
350mV typ
hysteresis
VIN falling
2.2
2.5
V
VFB = VFBP = VFB1 = VFB2 = 1.5V, VFBN = 0
(MAX1997 only)
1.25
IN Quiescent Current (Note 1)
VFB = VFBP = 1.5V, VFBN = 0 (MAX1998 only)
1
mA
-2µA < IREF < 50µA
1.223
1.270
REF Output Voltage
-2µA < IREF < 75µA
1.218
1.280
V
OVERCURRENT COMPARATOR
Input Offset Voltage
VOCN = VOCP = 1.5V to 0.8V
× VIN
-5
+5
mV
Input Bias Current
VOCN = VOCP = 0.8V
× VIN
-50
+50
nA
OCN, OCP Input Common-Mode Range
1.5
0.8
×
VIN
V
MAIN STEP-UP REGULATOR
Output Voltage Range
VIN
13
V
FREQ = IN
1
2
FREQ unconnected
0.563
0.937
Operating Frequency
FREQ = GND
0.25
0.50
MHz
Oscillator Maximum Duty Cycle
78
92
%
FB Regulation Voltage
ILX = 200mA
1.215
1.260
V
FB Fault Trip Level
VFB falling
0.96
1.04
V
FB Input Bias Current
VFB = 1.5V
-100
+100
nA
LX On-Resistance
450
m
Ω
LX Current Limit
1.6
2.8
A
POSITIVE LINEAR-REGULATOR CONTROLLERS (REG P, REG 1, AND REG 2)
IDRVP = 100µA
IDRV1 = 1350µA (MAX1997 only)
FB_ Regulation Voltage
IDRV2 = 335µA (MAX1997 only)
1.213
1.288
V
FB_ Fault Trip Level
VFB_ falling
0.96
1.04
V
VDRVP = 10V, IDRVP = 0.05mA to 1mA
VDRV1 = 10V, IDRV1 = 0.5mA to 5mA
(MAX1997 only)
FB_ Effective Load Regulation Error
(Transconductance)
VDRV2 = 10V, IDRV2 = 0.1mA to 2mA
(MAX1997 only)
-2.5
%
DRVP Sink Current
1
DRV1 Sink Current (MAX1997 Only)
5
DRV2 Sink Current (MAX1997 Only)
VFB_ = 1.1V, VDRV_ = 10V
5
mA



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