MAX1748 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1748 Datasheet PDF : 16 Pages
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Triple-Output TFT-LCD
DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3.0V, SHDN = IN, VSUPP = VSUPN = 10V, TGND = PGND = GND, CREF = 0.22µF, CINTG = 470pF, TA = 0°C to +85°C, unless
otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
Operating Frequency
FBP Regulation Voltage
FBP Input Bias Current
DRVP PCH On-Resistance
DRVP NCH On-Resistance
FBP Power-Ready Trip Level
FBP Fault Trip Level
Maximum RMS DRVP Current
NEGATIVE CHARGE PUMP
VSUPN Input Supply Range
VFBP
IFBP
VFBP = 1.5V
VFBP = 1.213V
VFBP = 1.275V
Rising edge
Falling edge
VSUPN
Operating Frequency
FBN Regulation Voltage
FBN Input Bias Current
DRVN PCH On-Resistance
DRVN NCH On-Resistance
FBN Power-Ready Trip Level
FBN Fault Trip Level
Maximum RMS DRVN Current
REFERENCE
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
VFBN
IFBN
VFBN = -0.05V
VFBN = 0.035V
VFBN = -0.025V
Rising edge
Falling edge
VREF
-2µA < IREF < +50µA
VREF rising
0.4V hysteresis (typ)
I SHDN
ISINK = 2mA
V RDY = 13V
MIN
1.20
-50
20
1.091
TYP
0.5 x
fOSC
1.25
3
1.5
1.125
1.11
0.1
MAX
1.30
+50
10
4
1.159
UNITS
Hz
V
nA
Ω
Ω
kΩ
V
V
A
2.7
13.0
V
0.5 x
fOSC
Hz
-50
0
+50
mV
-50
+50
nA
3
10
Ω
1.5
4
Ω
20
kΩ
80
110
165
mV
130
mV
0.1
A
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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