Max1747 triple charge-pump tft lcd dc-dc converter – Rainbow Electronics MAX1747 User Manual
Page 2
MAX1747
Triple Charge-Pump TFT LCD
DC-DC Converter
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
SUPM
= +3.0V, V
SUPP
= V
SUPN
= +5V, TGND = PGND = GND, I
SHDN
= 22µA, C
OUT
= 2
✕
4.7µF, C
REF
= 0.22µF, C
INTG
=
1500pF, V
OUT
= +5V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°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.
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 (V
SUPM
+ 0.3V)
CXP to PGND ............................(V
SUPM
- 0.3V) to (V
OUT
+ 0.3V)
DRVN to GND .........................................-0.3V to (V
SUPN
+ 0.3V)
DRVP to GND..........................................-0.3V to (V
SUPP
+ 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 (V
IN
+ 0.3V)
Continuous Current into:
SUPM, CXN, CXP, OUT ..............................................±800mA
SUPP, SUPN, DRVN, DRVP........................................±200mA
SHDN...........................................................................+100µA
All Other Pins ....................................................................±10mA
Continuous Power Dissipation (T
A
= +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
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
U N IT S
Input Supply Range
V
IN
2.7
4.5
V
Input Undervoltage Threshold
V
UVLO
V
IN
falling, 40mV hysteresis (typ)
2.2
2.4
2.6
V
Input Quiescent Supply
Current
I
IN
+
I
SUPM
V
FB
= V
FBP
= 1.5V, V
FBN
= -0.2V, V
OUT
= 5V,
no load on DRVN and DRVP; CXN
and CXP open
0.9
1.0
mA
Output Quiescent Supply
Current
I
Q(OUT)
V
FB
= V
FBP
= 1.5V, V
FBN
= -0.2V, V
OUT
= 5V,
no load on DRVN and DRVP; CXN and
CXP open
2.5
4.0
mA
Shutdown Supply Current
V
SHDN
= 0, V
SUPM
= 5V
0.1
20
µA
Operating Frequency
f
OSC
I
SHDN
= 22
µA
0.65
1
1.2
MHz
MAIN CHARGE PUMP
Output Voltage Range
V
OUT
4.5
5.5
V
Maximum Output Current
I
OU T( M AX )
C
X
= 0.47
µF
200
mA
FB Regulation Voltage
V
FB
1.237
1.248
1.263
V
FB Input Bias Current
I
FB
V
FB
= 1.25V
-50
+50
nA
Integrator Transconductance
530
µS
FB Power-Ready Trip Level
Rising edge
1.09
1.125
1.16
V
FB Fault Trip Level
Falling edge
1.100
V
Main Soft-Start Period
4.096
/ F
OSC
s
NEGATIVE LOW-POWER CHARGE PUMP
SUPN Input Supply Range
V
SUPN
2.7
13
V
SUPN Quiescent Current
I
SUPN
V
FBN
= -0.2V, no load on DRVN
0.6
0.8
mA
SUPN Shutdown Current
V
SHDN
= 0, V
SUPN
= 13V
0.1
10
µA
FBN Regulation Voltage
V
FBN
-50
0
+50
mV