LT3592

3

3592fa

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: The LT3592E is guaranteed to meet performance specifications

from 0°C to 125°C junction temperature. Specifications over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LT3592I is guaranteed over the full –40°C to 125°C operating junction

temperature range. The operating lifetime is derated at junction

temperatures greater than 125°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

l

3.25

3.6

V

Input Quiescent Current

- in Shutdown

Not Switching

2

0.1

3

2

mA

μA

CAP to OUT Voltage

0.4Ω CAP to OUT

BRIGHT = 1.4V

BRIGHT = 0.3V

l

l

190

18

200

20

210

22

mV

mV

DA Pin Current to Stop OSC

–0.8

–1

–1.2

A

Switching Frequency

350

800

1.9

400

900

2.2

450

1000

2.5

kHz

kHz

MHz

Maximum Duty Cycle

90

94

%

SHDN Input High Voltage

2.3

V

SHDN Input Low Voltage

0.3

V

BRIGHT Input High Voltage

1.4

V

BRIGHT Input Low Voltage

0.3

V

Switch Current Limit (Note 4)

l

0.85

1.25

1.5

A

300

mV

Boost Pin Current

20

30

mA

Switch Leakage Current

110

μA

Minimum Boost Voltage

1.8

2.5

V

Boost Diode Forward Voltage

800

mV

OUT = CAP = 4V

l

1.185

1.21

1.235

V

The

Note 3: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed the maximum operating junction temperature

when overtemperature protection is active. Continuous operation above

the specified maximum operating junction temperature may result in

device degradation or failure.

Note 4: Switch Current Measurements are performed when the outputs

are not switching. Slope compensation reduces current limit at higher duty

cycles.