3

LT3503

3503f

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switch Current Limit

(Note 3)

1.45

1.75

2.2

A

400

mV

Switch Leakage Current

2

µA

Minimum Boost Voltage Above Switch

2

2.3

V

BOOST Pin Current

25

50

mA

SHDN Input Voltage High

2.3

V

SHDN Input Voltage Low

0.3

V

SHDN Bias Current

6

15

µA

0.01

0.1

µA

The

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 LT3503E 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.

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.

TYPICAL PERFOR A CE CHARACTERISTICS

LOAD CURRENT (A)

0

82

86

90

0.8

3503 G01

78

74

80

84

88

76

72

70

0.2

0.4

0.6

1.0

1.2

L = 2.5

µH

LOAD CURRENT (A)

0

82

86

90

0.8

3503 G02

78

74

80

84

88

76

72

70

0.2

0.4

0.6

1.0

1.2

L = 3.3

µH