LT3505

3

3505fc

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 LT3505E is guaranteed to meet performance 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. The LT3505I specifications are

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

3.6

36

V

Undervoltage Lockout

3.1

3.35

3.6

V

Feedback Voltage

"

765

780

795

mV

FB Pin Bias Current

"

55

150

nA

Quiescent Current

2.0

2.7

mA

Quiescent Current in Shutdown

0.01

2

µA

Reference Line Regulation

0.007

%/V

Switching Frequency

2.70

675

180

3.01

750

200

3.30

825

220

MHz

kHz

kHz

Maximum Duty Cycle

"

90

94

%

Error Amp Transconductance

200

µA/V

Error Amp Voltage Gain

400

V/V

10

µA

14

µA

0.9

V

1.7

V

0.5

50

V

mV

Switch Current Limit

(Note 3)

1.4

1.75

2.2

A

350

mV

Switch Leakage Current

0.1

2

µA

Minimum Boost Voltage Above Switch

1.6

2.2

V

BOOST Pin Current

24

50

mA

SHDN Input Voltage High

2.3

V

SHDN Input Voltage Low

0.3

V

SHDN Bias Current

6

0.01

20

0.1

µA

µA

"

denotes the specifications which apply over the full operating

Note 3: Current limit guaranteed by design and/or correlation to static test.

Slope compensation reduces current limit at higher duty cycle.

Note 4: Current flows out of pin.

Note 5: Current flows into pin.