MAX1518B Datasheet, PDF (2/25 Pages) Maxim Integrated Products – TFT-LCD DC-DC Converter with Operational Amplifiers

TFT-LCD DC-DC Converter with
Operational Amplifiers
ABSOLUTE MAXIMUM RATINGS
IN, CTL to AGND ......................................................-0.3V to +7V
COMP, FB, FBP, FBN, DEL, REF to AGND ....-0.3V to (V_IN + 0.3V)
PGND, BGND to AGND ......................................................±0.3V
LX to PGND ............................................................-0.3V to +14V
SUP to AGND .........................................................-0.3V to +14V
DRVP, SRC to AGND..............................................-0.3V to +30V
POS_, NEG_, OUT_ to AGND ...................-0.3V to (V_SUP + 0.3V)
DRVN to AGND ...................................(V_IN - 30V) to (V_IN + 0.3V)
DRN to AGND...........................................-0.3V to (V_SRC + 0.3V)
DRN to COM............................................................-30V to +30V
OUT_ Maximum Continuous Output Current....................±75mA
LX Switch Maximum Continuous RMS Output Current .........1.6A
Continuous Power Dissipation (T_A = +70°C)
32-Pin Thin QFN (derate 21.2mW/°C above +70°C) ..1702mW
Operating Temperature Range .........................-40°C to +100°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, PGND = AGND = BGND = 0, I_REF = 25µA, T_A = 0°C to +85°C. Typical values are at T_A = +25°C, unless other-
wise noted.)
PARAMETER
IN Supply Range
IN Undervoltage-Lockout
Threshold
SYMBOL
V_IN
CONDITIONS
V_UVLO V_IN rising, typical hysteresis = 200mV
MIN TYP MAX UNITS
2.6
6.5
V
2.25 2.5 2.70
V
IN Quiescent Current
V_FB = V_FBP = 1.4V, V_FBN = 0,
LX not switching
I_IN
V_FB = 1.1V, V_FBP = 1.4V, V_FBN = 0,
LX switching
0.6
0.8
mA
6
11
Duration to Trigger Fault
Condition
REF Output Voltage
Thermal Shutdown
MAIN STEP-UP REGULATOR
Output Voltage Range
Operating Frequency
Oscillator Maximum Duty Cycle
FB Regulation Voltage
FB Fault Trip Level
FB Load Regulation
FB Line Regulation
FB Input Bias Current
FB Transconductance
FB Voltage Gain
-2µA < I_REF < 50µA, V_IN = 2.6V to 5.5V
Temperature rising
Hysteresis
200
ms
1.231 1.250 1.269
V
+160
°C
15
V_MAIN
V_IN
13
V
f_OSC
1020 1200 1380 kHz
84
87
90
%
V_FB
No load
T_A = +25°C to +85°C 1.221 1.233 1.245
V
T_A = 0°C to +85°C
1.218 1.233 1.247
V_FB falling
1.12 1.16 1.19
V
0 < I_MAIN < full load, transient only
-1.6
%
V_IN = 2.6V to 5.5V
+0.04 ±0.15 %/ V
V_FB = 1.4V
∆I_COMP = 5µA
-40
+40
nA
75
160 280
µS
FB to COMP
600
V/ V
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