MAX1747 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1747 Datasheet PDF : 13 Pages
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Triple Charge-Pump TFT LCD
DC-DC Converter
ABSOLUTE MAXIMUM RATINGS
IN, SUPM, OUT, TGND to GND................................-0.3V to +6V
SHDN........................................................................-0.3V to +1V
PGND to GND.....................................................................±0.3V
SUPM to IN .........................................................................±0.3V
CXN to PGND.........................................-0.3V to (VSUPM + 0.3V)
CXP to PGND ............................(VSUPM - 0.3V) to (VOUT + 0.3V)
DRVN to GND .........................................-0.3V to (VSUPN + 0.3V)
DRVP to GND..........................................-0.3V to (VSUPP + 0.3V)
RDY to GND ...........................................................-0.3V to +14V
SUPP, SUPN to GND..............................................-0.3V to +14V
INTG, REF, FB, FBN, FBP to GND ...............-0.3V to (VIN + 0.3V)
Continuous Current into:
SUPM, CXN, CXP, OUT ..............................................±800mA
SUPP, SUPN, DRVN, DRVP........................................±200mA
SHDN ...........................................................................+100µA
All Other Pins ....................................................................±10mA
Continuous Power Dissipation (TA = +70°C)
20-Pin TSSOP (derate 10.9mW/°C above +70°C) .......879mW
Operating Temperature Range............................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = VSUPM = +3.0V, VSUPP = VSUPN = +5V, TGND = PGND = GND, I SHDN = 22µA, COUT = 2 ✕ 4.7µF, CREF = 0.22µF, CINTG =
1500pF, VOUT = +5V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Input Supply Range
Input Undervoltage Threshold
Input Quiescent Supply
Current
SYMBOL
CONDITIONS
MIN
VIN
2.7
VUVLO VIN falling, 40mV hysteresis (typ)
2.2
IIN +
ISUPM
VFB = VFBP = 1.5V, VFBN = -0.2V, VOUT = 5V,
no load on DRVN and DRVP; CXN
and CXP open
TYP
2.4
0.9
MAX
4.5
2.6
U N IT S
V
V
1.0
mA
Output Quiescent Supply
Current
IQ(OUT)
Shutdown Supply Current
Operating Frequency
MAIN CHARGE PUMP
Output Voltage Range
Maximum Output Current
FB Regulation Voltage
FB Input Bias Current
Integrator Transconductance
FB Power-Ready Trip Level
FB Fault Trip Level
fOSC
VOUT
IOUT(MAX)
VFB
IFB
Main Soft-Start Period
NEGATIVE LOW-POWER CHARGE PUMP
SUPN Input Supply Range
VSUPN
SUPN Quiescent Current
ISUPN
SUPN Shutdown Current
FBN Regulation Voltage
VFBN
VFB = VFBP = 1.5V, VFBN = -0.2V, VOUT = 5V,
no load on DRVN and DRVP; CXN and
CXP open
V SHDN = 0, VSUPM = 5V
I SHDN = 22µA
CX = 0.47µF
VFB = 1.25V
Rising edge
Falling edge
VFBN = -0.2V, no load on DRVN
V SHDN = 0, VSUPN = 13V
0.65
4.5
200
1.237
-50
1.09
2.7
-50
2.5
0.1
1
1.248
530
1.125
1.100
4.096
/ FOSC
0.6
0.1
0
4.0
20
1.2
5.5
1.263
+50
1.16
13
0.8
10
+50
mA
µA
MHz
V
mA
V
nA
µS
V
V
s
V
mA
µA
mV
2 _______________________________________________________________________________________
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