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White LED 1x/1.5x Charge Pump
for Main and Sub-Displays
ABSOLUTE MAXIMUM RATINGS
IN, OUT, ENM, ENS to GND..................................-0.3V to +6.0V
SET, LED_, C1N, C2N to GND.....................-0.3V to (V IN + 0.3V)
C1P, C2P to GND.............................................................-0.3V to
the greater of (V OUT + 1V) or (V IN + 1V)
OUT Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T A = +70 ° C)
16-Pin Thin QFN 4mm x 4mm
(derate 16.9 mW/ ° C above +70 ° C) ............................1349mW
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 = 3.6V, V GND = 0V, ENM = ENS = IN, R SET = 6.81k Ω , C IN = C1 = C2 = C OUT = 1μF, T A = -40°C to +85°C, unless otherwise
noted. Typical values are at T A = +25 ° C.) (Note 1)
PARAMETER
IN Operating Voltage
Undervoltage-Lockout Threshold
V IN falling
CONDITIONS
MIN
2.7
2.25
TYP
2.45
MAX
5.5
2.60
UNITS
V
V
Undervoltage-Lockout Hysteresis
35
mV
OUT Overvoltage-Protection Threshold
No-Load Supply Current
V OUT rising
1MHz switching in 1.5x mode
No switching in 1x mode,10% setting
5
2
0.5
V
mA
Shutdown Supply Current
Soft-Start Time
SET Bias Voltage
SET Leakage in Shutdown
SET Current Range
SET-to-LED_ Current Ratio (I LED_ / I SET )
ENM = ENS = OUT = GND
ENM = ENS = GND
T A = 0 ° C to +85 ° C
T A = -40 ° C to +85 ° C
100% setting
10
30
0.1
2
0.6
0.01
234
2
1
130
130
μA
ms
V
μA
μA
A/A
LED Current Accuracy
LED-to-LED Current Matching (Note 2)
Maximum LED_ Sink Current
LED_ Dropout Voltage
LED_ 1x-to-1.5x Transition Threshold
LED Leakage in Shutdown
Maximum OUT Current
Open-Loop OUT Resistance
T A = +25 ° C to +85 ° C
T A = -40 ° C to +85 ° C
T A = +25 ° C to +85 ° C
T A = -40 ° C to +85 ° C
R SET = 4.53k Ω
(Note 3)
V LED falling
ENM = ENS = GND, V LED_ = 5.5V
V IN ≥ 3.4V, V OUT = 3.9V, 100% setting
1x mode (V IN - V OUT ) / I OUT
1.5x mode (1.5 x V IN - V OUT ) / I OUT
-8
-9.5
-5
-6.5
27.4
90
120
± 2
± 1.5
30.0
60
100
0.01
1
4.2
+8
+9.5
+5
+6.5
100
110
1
2.5
10
%
%
mA
mV
mV
μA
mA
Ω
Switching Frequency
1
MHz
OUT Pulldown Resistance
ENM, ENS High Voltage
ENM, ENS Low Voltage
ENM = ENS = GND
V IN = 2.7V to 5.5V
V IN = 2.7V to 5.5V
1.6
5
0.4
k Ω
V
V
ENM, ENS Input Current
V EN_ = 0V or 5.5V
0.01
1
μA
Shutdown Delay
From falling edge of ENM and ENS
1.0
2
3.3
ms
2
_______________________________________________________________________________________
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