3

LT3477

3477fb

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Soft-Start Pin Current

SS = 0.5V, Out of Pin

9

µA

FBP Pin Bias Current

25

100

nA

FBN Pin Bias Current

25

100

nA

Feedback Amplifier Offset Voltage

–2

2

6

mV

Feedback Amplifier Voltage Gain

500

V/V

Voltage Feedback Amplifier Transconductance

500

µS

Feedback Amplifier Sink Current

10

µA

Feedback Amplifier Source Current

10

µA

Current Sense Amplifier Sense Voltage

●

97.5

100

102.5

mV

●

97.5

100

103

mV

Ground

88

100

112

mV

Switching Frequency

0.9

1

1.15

MHz

160

200

240

kHz

2.7

3.5

4.3

MHz

Maximum Switch Duty Cycle

●

87

93

%

Switch Current Limit

(Note 3)

3

4

5

A

150

200

mV

Switch Leakage Current

SW = 40V

0.2

5

µA

SHDN Pin Current

30

60

µA

0.1

1

µA

SHDN Pin Threshold

0.3

1.5

2

V

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 LT3477E is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

TYPICAL PERFOR A CE CHARACTERISTICS

Switch Current Limit

junction temperature range are assured by design, characterization and

correlation with statistical process controls. The LT3477I is guaranteed

over the full –40

°C to 125°C operating junction temperature range.

by design and/or correlation to static test.

SWITCH CURRENT (A)

0

0

0.10

0.20

0.30

0.25

0.5

1

1.5

2

3477 G01

2.5

0.40

0.50

0.05

0.15

125

°C

–50

°C

0.35

0.45

3

25

°C

TEMPERATURE (

°C)

–50

–25

0

2

5

0

50

75

3477 G02

1

4

3

25

100

125

TEMPERATURE (

°C)

–50

1.21

1.22

1.23

1.24

1.25

050

100

150

3477 G03

1.26

1.27

–25

25

75

125