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125mA 1x/1.5x Charge Pumps for 5 White LEDs
in 3mm x 3mm TDFN
ABSOLUTE MAXIMUM RATINGS
IN, OUT to GND.....................................................-0.3V to +6.0V
C1N, C2N, ENM, CPWM, ENS,
PWM to GND ............................................-0.3V to (V IN + 0.3V)
LED_ to GND ............................................-0.3V to (V OUT + 0.3V)
C1P, C2P to GND ...-0.3V to greater of (V OUT + 1V) or (V IN + 1V)
OUT Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T A = +70°C)
14-Pin TDFN 3mm x 3mm
(derate 18.2mW/°C above +70°C) .............................1454mW
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, EN_ (PWM) = IN, 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 rising or falling
CONDITIONS
MIN
2.7
2.20
TYP
2.45
MAX
5.5
2.65
UNITS
V
V
Undervoltage-Lockout Hysteresis
100
mV
Output Overvoltage Protection
Threshold
No-Load Supply Current
V OUT rising, any LED_ = GND
1/32nd setting, 1.5x mode
1/32nd setting, 1x mode
5
1.4
0.35
V
mA
Shutdown Supply Current
ENM = ENS (PWM) = GND
T A = +25°C
T A = +85°C
0.01
0.1
2
μA
Soft-Start Time (t SOFT-START )
MAX8630_ETD15
2
15
ms
Full-Scale LED Current
MAX8630_ETD18
MAX8630_ETD20
MAX8630_ETD25
18
20
25
mA
Full-Scale LED Current Accuracy
T A = +25°C
T A = -40°C to derating function start temperature
-1
-3.5
±0.3
±0.3
+1
+3.5
%
Derating Function Start
Temperature
40
°C
Derating Function Slope
T A = +40°C to +85°C
-1.67
%/°C
LED_ Dropout Voltage
1x to 1.5x Mode Transition
Threshold
Input Voltage Mode Transition
Hysteresis
1.5x Mode Regulation Voltage
OUT Pulldown Resistance in
Shutdown
100% LED setting (Note 2)
V LED_ falling
Minimum of V LED_
ENM = ENS (PWM) = GND
40
88
70
122
5
75
mV
mV
mV
mV
k Ω
2
_______________________________________________________________________________________
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