LT3476

3

3476fa

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Quiescent Current Idle

PWM1-4 = 0V

5.5

mA

Quiescent Current Active (Not Switching)

VC1-4 = 0V

22

30

mA

Switching Frequency

1700

850

160

2000

1000

200

2300

1150

240

kHz

kHz

kHz

1.26

V

Maximum Duty Cycle

84

76

90

98

%

%

%

Current Out of Pin

–10

20

100

nA

VC1-4 Idle Input Bias Current

PWM1-4 = 0V

–20

0

20

nA

200

μS

VC Output Impedance

3MΩ

SW1-4 Current Limit

Static Test

1.5

2

2.5

A

350

mV

SW1-4 Leakage Current

SHDN = 0V

0.1

5

μA

CAP1-4 Overvoltage Protect Threshold

33.5

35

V

CAP1-4/LED1-4 Idle Input Bias Current

PWM1-4 < 0.4V, CAP = LED = 5V

100

nA

CAP1-4/LED1-4 Input Bias Current

CAP = LED = 5V

70

μA

SHDN Input Low Voltage

0.4

V

SHDN Input High Voltage

1.5

V

SHDN Pin Current

16

30

μA

PWM1-4 Input Low Voltage

0.4

V

PWM1-4 Input High Voltage

1.5

V

PWM1-4 Pin Current

50

100

μA

ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

Note 3: The LT3476E is guaranteed to meet specifications from 0°C to

85°C. Specifications over the –40°C to 85°C operating temperature range

are assured by design, characterization and correlation with statistical

process controls.