MAX1570 Datasheet, PDF (2/11 Pages) Maxim Integrated Products – White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump

White LED Current Regulator with 1x/1.5x
High-Efficiency Charge Pump
ABSOLUTE MAXIMUM RATINGS
IN, OUT, EN1, EN2 to GND ......................................-0.3V to +6V
SET, LED1, LED2, LED3, LED4,
LED5 to GND ...........................................-0.3V to (V_IN + 0.3V)
PGND to GND..........................................................-0.3 to +0.3V
C1N, C2N to GND ..........................................-0.3V to (V_IN + 1V)
C1P, C2P to GND ..........................................-0.3V to the greater
(V_OUT + 1V) or (V_IN + 1V)
OUT Short Circuit to GND..............................................Indefinite
Continuous Power Dissipation (T_A = +70°C)
16-Pin Thin QFN (derate 16.9 mW/°C) .......................1349mW
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 = 3.6V, GND = PGND = 0, EN1 = EN2 = IN, C_IN = C1 = C2 = 1µF, C_OUT = 4.7µF, T_A = 0°C to +85°C, unless otherwise noted.
Typical values are at T_A = +25°C.)
PARAMETER
IN Operating Voltage
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Supply Current
Shutdown Supply Current
Soft-Start Done Time
SET Bias Voltage
SET Leakage in Shutdown
SET Current Range
SET to LED_ Current Ratio
LED_ to LED_ Current Matching
Maximum LED_ Sink Current
LED_ Dropout Voltage
LED1 Regulation Voltage
(1.5x Mode)
LED Leakage in Shutdown
Maximum OUT Current
Open-Loop OUT Resistance
Switching Frequency
EN1, EN2 High Voltage
EN1, EN2 Low Voltage
EN1, EN2 Input Current
CONDITIONS
V_IN rising or falling
1MHz switching, no load
EN1 = EN2 = GND
EN1 = GND, EN2 = IN, I_SET = 33µA
EN1 = IN, EN2 = GND, I_SET = 67µA
EN1 = IN, EN2 = IN, I_SET = 100µA
EN1 = EN2 = GND, V_IN = 5.5V, V_SET = 0 or 5.5V
I_LED/I_SET, I_SET = 67µA, V_{LED_}= 1V
I_SET = 67µA, V_{LED_}= 1V
I_SET = 130µA, V_{LED_}= 1V
I_SET = 33µA (Note 1)
I_SET = 67µA (Note 2)
I_SET = 100µA (Note 2)
EN1 = GND, EN2 = IN, I_SET = 33µA
EN1 = IN, EN2 = GND, I_SET = 67µA
EN1 = IN, EN2 = IN, I_SET = 100µA
EN1 = GND, EN2 = GND, V_{LED_}= 5.5V
IN ≥ 3.4V, OUT ≥ 3.9V
1x mode (V_IN - V_OUT)/I_OUT
1.5x mode (1.5V_IN - V_OUT)/I_OUT
IN = 2.7V to 5.5V
IN = 2.7V to 5.5V
EN_ = GND or 5.5V
MIN
2.7
2.25
0.190
0.380
0.570
20
215
-3
28
185
277
360
150
1.6
TYP
2.45
35
2.0
0.1
2.1
0.200
0.400
0.600
0.01
230
0.3
30
100
200
230
200
300
400
0.01
1.00
1
0.01
MAX
5.5
2.60
3.5
5
0.210
0.420
0.630
1.00
130
245
+3
180
360
410
215
323
440
1.00
1.75
8
0.4
1.00
UNITS
V
V
mV
mA
µA
ms
V
µA
µA
A/A
%
mA
mV
mV
µA
mA
Ω
MHz
V
V
µA
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