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High-Efficiency, 26V Step-Up Converters for Main
and Subdisplays Using OLEDs and/or White LEDs
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to +7V
PGND to GND .......................................................-0.3V to +0.3V
LX to GND.................................................-0.3V to (V OVP + 0.3V)
OVP, OUTA, OUTB to GND....................................-0.3V to +30V
CTRL to GND...................-0.3V to the lower of +7V or (V IN + 2V)
COMP, FBA, FBB, FSEL,
ENA, ENB to GND ....................................-0.3V to (V IN + 0.3V)
Continuous Power Dissipation (T A = +70°C)
14-Pin TDFN 3mm x 3mm (derate 18.2mW/°C
above +70°C)..............................................................1454mW
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
I LX ......................................................................................1A RMS
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 = 3.0V, V OVP = 20V, L1 = 22μH, C OVP = 1μF, C COMP = 0.01μF, R COMP = 10k ? , R SENSE = 13 ? , V CTRL = 1.6V, T A = -40°C to
+85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER
Supply Voltage
UVLO Threshold
V IN rising or falling
CONDITIONS
MIN
2.7
2.05
TYP
2.38
MAX
6.0
2.70
UNITS
V
V
UVLO Hysteresis
140
mV
Quiescent Current
No switching
0.4
0.8
mA
Shutdown Supply Current
OVLO Threshold
CTRL = GND,
OVP = IN
V OVP rising
T A = +25°C
T A = +85°C
26
0.01
0.01
27
1
28
μA
V
OVLO Hysteresis
2
V
V OVP = 26V, ENA = IN
30
50
75
OVP Input Bias Current
OVP = IN, ENA =
T A = +25°C
0.01
1
μA
ENB = GND
T A = +85°C
0.01
Thermal Protection
Typical hysteresis = 20°C
+160
°C
Output Voltage Range
(Note 2)
(V IN -
V D1 )
26
V
ENA, ENB, FSEL Logic Input-
Voltage High
ENA, ENB, FSEL Logic Input-
Voltage Low
V IN = 2.7V to 6V
V IN = 2.7V to 6V
1.4
0.6
V
V
ENA, ENB, FSEL Input
Leakage
V LOGIC = 6V
T A = +25°C
T A = +85°C
0.01
0.01
1
μA
ERROR AMPLIFIER
CTRL to FBA/FBB Regulation
V CTRL = 1.5V, V IN = 2.7V to 6V, T A = +25°C
0.295
0.300
0.305
V
FBA, FBB Input Bias Current
V FBA or V FBB =
V CTRL / 5
T A = +25°C
T A = +85°C
0.01
0.2
1
μA
CTRL Input Resistance
Derating Function Start
Temperature
Derating Function Slope
V CTRL ≤ 1.0V, T A = -40°C to start of T A derating function
MAX8608Y, V CTRL = 3.0V, ENA = IN
MAX8608Y, V CTRL = 3.0V, ENA = IN, T A = start of T A
derating to +85°C
290
500
+40
-5.8
780
k ?
°C
mV/°C
2
_______________________________________________________________________________________
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