Absolute maximum ratings, Electrical characteristics – Rainbow Electronics MAX1543 User Manual
Page 2
MAX1542/MAX1543
TFT LCD DC-to-DC Converter with
Operational Amplifiers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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, CTL, COMP, FB, DEL, FREQ (MAX1543)
to AGND ...............................................................-0.3V to +6V
COMP, FB, DEL to AGND .............................-0.3V to (IN + 0.3V)
PGND to AGND ..................................................................±0.3V
LX to PGND ............................................................-0.3V to +14V
SUP, POS1, NEG1, OUT1, POS2,
NEG2, OUT2 to AGND .......................................-0.3V to +14V
POS1, NEG1, OUT1, POS2, NEG2,
OUT2 to AGND ......................................-0.3V to (SUP + 0.3V)
SRC, COM to AGND...............................................-0.3V to +30V
SRC to COM ...........................................................-0.3V to +30V
SRC to DRN (MAX1543).........................................-0.3V to +30V
COM to AGND ...........................................-0.3V to (SRC + 0.3V)
DRN (MAX1543) to AGND .........................-0.3V to (SRC + 0.3V)
DRN (MAX1543) to COM.........................................-30V to +30V
MAX1542 COM RMS Output Current ...............................+75mA
MAX1543 COM RMS Output Current ...............................±50mA
OUT1, OUT2 Continuous Output Current.........................±75mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin Thin QFN 5mm x 5mm
(derate 20.8mW/°C above +70°C) .............................1667mW
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
ELECTRICAL CHARACTERISTICS
(V
IN
= 3V, V
SUP
= 8V, V
SRC
= 28V, FREQ = IN (MAX1543), PGND = AGND = 0, T
A
= 0°C to +85°C, typical values at T
A
= +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
IN Supply Range
V
IN
2.6
5.5
V
V
IN
rising
2.3
2.5
2.7
IN Undervoltage Lockout
Threshold
V
UVLO
V
IN
falling
2.2
2.35
2.5
V
V
FB
= 1.3V, LX not switching
0.45
0.65
IN Quiescent Current
I
IN
V
FB
= 1.1V, LX switching
3.6
6.5
mA
MAX1542
55
FREQ = AGND
51
Duration to Trigger Fault
Condition
MAX1543
FREQ = IN
55
ms
Rising edge
160
Thermal Shutdown
Hysteresis
15
°C
MAIN STEP-UP REGULATOR
Output Voltage Range
V
MAIN
V
IN
13
V
MAX1542
1020
1200
1380
MAX1543
FREQ = AGND
512
600
768
Operating Frequency
f
OSC
FREQ = IN
1020
1200
1380
kHz
Oscillator Maximum Duty Cycle
82
87
92
%
FREQ Input Low Voltage
MAX1543, V
IN
= 2.6V to 5.5V
0.3 x V
IN
V
FREQ Input High Voltage
MAX1543, V
IN
= 2.6V to 5.5V
0.7 x
V
IN
V
FREQ Pulldown Current
MAX1543, V
FREQ
= 1.0V
3.5
5
6.5
µA
T
A
= +85°C
1.224
1.240
1.256
FB Regulation Voltage
V
FB
No load
T
A
= 0°C to +85°C
1.222
1.240
1.258
V
FB Fault Trip Level
V
FB
falling
0.96
1
1.04
V
FB Load Regulation
0
≤ I
MAIN
≤ full load
-1
%
FB Line Regulation
V
IN
= 2.6V to 5.5V
-0.08
±0.15
%/V