Datasheet MAX1573 (Analog Devices) - 2

White LED 1x/1.5x Charge Pump in UCSP and Thin QFN ABSOLUTE MAXIMUM RATINGS
IN, OUT, EN1, EN2 to GND ...-0.3V to +6.0V Continuous Power Dissipation (TA = +70°C) SET, LED1, LED2, LED3, LED4 to GND ..-0.3V to (VIN + 0.3V) 14-Bump UCSP (derate 7.36mW/°C above +70°C) ..589mW C1N, C2N to GND ..-0.3V to (VIN + 1V) 16-Pin Thin QFN (derate 16.9mW/°C above +70°C) .1349mW C1P, C2P to GND ..-0.3V to greater of Operating Temperature Range ...-40°C to +85°C ...(VOUT + 1V) or (VIN + 1V) Junction Temperature ..+150°C OUT Short Circuit to GND ..Continuous Storage Temperature Range ...-65°C to +150°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
MAX1573
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
(VIN = VEN1 = VEN2 = 3.6V, CIN = C1 = C2 = COUT = 1µF, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
IN Operating Voltage 2.7 5.5 V Undervoltage Lockout Threshold VIN rising or falling, 35mV hysteresis 2.25 2.45 2.60 V Supply Current Switching, no load, ISET = 130µA 2 4 mA Shutdown Supply Current EN1 = EN2 = OUT = GND, TA = +25°C 0.1 10 µA Soft-Start Completion Time 2.1 ms SET Bias Voltage 0.570 0.6 0.630 V SET Leakage in Shutdown EN1 = EN2 = GND, TA = +25°C 0.01 1 µA SET Current Range 40 130 µA EN1 = EN2 = IN 190 219 245 SET to LED_ Current Ratio (ILED/ISET) ISET = 60µA EN1 = IN, EN2 = GND 58 66 74 A/A EN1 = GND, EN2 = IN 19.5 22 25.0 LED_ Current Accuracy E N 1 = EN 2 = IN , RS E T = 4.64kΩ , TA = 0°C to + 85°C ±0.6 % LED_ Current Matching ISET = 130µA, TA = 0°C to +85°C (Note 2) ±0.2 % Maximum LED_ Sink Current ISET = 130µA, EN1 = EN2 = IN 25.9 28 mA LED_ Dropout Voltage ISET = 87µA (Note 3) 40 80 mV LED_ Minimum Regulation Voltage (1.5x Mode) EN1 = EN2 = IN, ISET = 87µA 100 150 200 mV LED Leakage in Shutdown EN1 = EN2 = GND, VLED = 5.5V, TA = +25°C 0.01 1 µA Maximum OUT Current VIN ≥ 3.4V, VOUT ≥ 3.9V, EN1 = EN2 = IN 120 mA 1x mode (1 x VIN - VOUT) / IOUT 1.5 Open-Loop OUT Resistance Ω 1.5x mode (1.5 x VIN - VOUT) / IOUT 10 Switching Frequency 1 MHz EN1, EN2 Logic High Voltage VIN = 2.7V to 5.5V 1.6 V EN1, EN2 Logic Low Voltage VIN = 2.7V to 5.5V 0.4 V EN1, EN2 Input Current VEN_ = GND or 5.5V, TA = +25°C 0.01 1 µA Thermal-Shutdown Threshold 20°C hysteresis 160 °C
Note 1:
Specifications to -40°C are guaranteed by design and not production tested.
Note 2:
LED_ current matching is defined as: (ILED - IAVG) / IAVG.
Note 3:
Dropout voltage is defined as the LED_ to GND voltage at which the LED_ current drops 10% from the value at VLED = 200mV.
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