MAX1542 Datasheet, PDF (2/20 Pages) Maxim Integrated Products – TFT LCD DC-to-DC Converter with Operational Amplifiers

TFT LCD DC-to-DC Converter with
Operational Amplifiers
ABSOLUTE MAXIMUM RATINGS
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
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
(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
IN Supply Range
IN Undervoltage Lockout
Threshold
IN Quiescent Current
Duration to Trigger Fault
Condition
Thermal Shutdown
MAIN STEP-UP REGULATOR
Output Voltage Range
Operating Frequency
Oscillator Maximum Duty Cycle
FREQ Input Low Voltage
FREQ Input High Voltage
FREQ Pulldown Current
FB Regulation Voltage
FB Fault Trip Level
FB Load Regulation
FB Line Regulation
SYMBOL
V_IN
V_UVLO
I_IN
CONDITIONS
V_IN rising
V_IN falling
V_FB = 1.3V, LX not switching
V_FB = 1.1V, LX switching
MAX1542
MAX1543
FREQ = AGND
FREQ = IN
Rising edge
Hysteresis
V_MAIN
f_OSC
MAX1542
MAX1543
FREQ = AGND
FREQ = IN
MAX1543, V_IN = 2.6V to 5.5V
MAX1543, V_IN = 2.6V to 5.5V
MAX1543, V_FREQ = 1.0V
V_FB
No load
T_A = +85°C
T_A = 0°C to +85°C
V_FB falling
0 ≤ I_MAIN ≤ full load
V_IN = 2.6V to 5.5V
MIN TYP MAX UNITS
2.6
5.5
V
2.3
2.5
2.7
V
2.2 2.35 2.5
0.45 0.65
mA
3.6
6.5
55
51
ms
55
160
°C
15
V_IN
13
V
1020 1200 1380
512 600 768
kHz
1020 1200 1380
82
87
92
%
0.3 x V_IN V
0.7 x
V
V_IN
3.5
5
6.5
µA
1.224 1.240 1.256
V
1.222 1.240 1.258
0.96
1
1.04
V
-1
%
-0.08 ±0.15 %/V
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