LT3509

3

3509f

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.

1 second transients and 36V for continuous operation.

Note 3. The LT3509E 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

The

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

3.3

3.6

V

37

38.5

40

V

Input Quiescent Current

1.9

2.2

mA

Input Shutdown Current

V(RUN/SS[1,2]) < 0.3V

9

15

μA

Feedback Pin Voltage

l

0.784

0.8

0.816

V

Reference Voltage Line Regulation

0.01

%/V

RUN/SS Shutdown Threshold

0.4

0.6

0.8

V

2V

RUN/SS Pin Pull-up Current

0.7

1

1.3

μA

Feedback Pin Bias Current

l

90

500

nA

Switch Current Limit

l

1.05

1.4

1.9

A

DA Comparator Current Threshold

0.7

0.95

1.2

A

Boost Pin Current

22

36

mA

Switch Leakage Current

0.01

1.0

μA

Switch Saturation Voltage

0.32

V

Minumum Boost Voltage above Switch

1.5

2.2

V

Boost Diode Forward Voltage

0.7

0.9

V

Boost Diode Leakage

0.1

5

μA

Switching Frequency

l

0.92

237

2.0

1.0

264

2.2

1.08

290

2.5

MHz

kHz

MHz

Switch Minimum Off Time

l

80

150

ns

and correlation with statistical process controls. The LT3509I is guaranteed

over the full –40°C to 125°C temperature range.

Note 4. Switch Saturation Voltage is guaranteed by design.

Note 5. This IC includes over-temperature protection that is intended to protect

the device during momentary overload conditions. Junction temperature will

exceed the maximum operating temperature when overtemperature protection

is active. Continuous operation above the specified maximum operating

junction temperature may impair device reliability.