Low-Dropout, Constant-Current

Triple White LED Bias Supply

2

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ABSOLUTE MAXIMUM RATINGS

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.

correlation using statistical quality control (SQC) methods.

Note 2: Dropout Voltage is defined as the LED_ to GND voltage at which current sink into LED_ drops 20% from the value at

Note 3: Dropout Voltage is defined as the LED_ to GND voltage at which current sink into LED_ drops 10% from the value at

EN, SET, LED1, LED2, LED3 to GND ..................... -0.3V to +6V

6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C) ... 727mW

Operating Temperature Range ......................... -40°C to +85°C

Storage Temperature Range ........................... -65°C to +150°C

Lead Temperature (soldering, 10s)................................... 300°C

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range

EN is the power-supply input

2.5

5.5

V

2.2

2.47

V

Undervoltage Lockout

Threshold

Hysteresis

85

mV

SET Input Current Range

5

260

µA

SET to LED_ Current Ratio

µA

207

230

253

A/A

SET Bias Voltage

µA

1.154

1.215

1.276

V

°C to +25°C

0.01

1

SET Leakage Current

in Shutdown

EN = GND,

°C to +85°C5

µA

LED_-to-LED_ Current Matching

µA0.3

5

%

Maximum LED_ Sink Current

_

Each LED_

60

mA

µA (Note 2)

100

180

µA (Note 3)

200

360

LED_ Dropout Voltage

µA (Note 3)

230

410

mV

LED_ Leakage Current

in Shutdown

GND, each LED_

°C

0.01

1

µA

Input High Voltage

2.5

Input Low Voltage

2.2

V

input

40

100

EN Input Bias Current

°C

0.05

1

µA

Thermal Shutdown Temperature

170

°C

Thermal Shutdown Hysteresis

10

°C