LT3480

3

3480fb

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 LT3480E 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 LT3480I specifications are

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

The

Note 3: Bias current flows out of the FB pin.

Note 4: This is the minimum voltage across the boost capacitor needed to

guarantee full saturation of the switch.

nonrepetitive 1 second transients, and 40V for continious operation.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

l

0.01

30

105

0.5

100

160

μA

μA

μA

Quiescent Current from BD

l

0.01

80

1

0.5

120

5

μA

μA

μA

Minimum Bias Voltage (BD Pin)

2.7

3

V

Feedback Voltage

l

780

775

790

790

800

805

mV

mV

FB Pin Bias Current (Note 3)

l

730

nA

FB Voltage Line Regulation

0.002

0.01

%/V

400

μMho

Error Amp Gain

1000

45

μA

45

μA

3.5

A/V

2V

Switching Frequency

2.1

0.9

160

2.4

1

200

2.7

1.15

240

MHz

MHz

kHz

Minimum Switch Off-Time

l

60

150

nS

Switch Current Limit

Duty Cycle = 5%

3

3.5

4

A

500

mV

Boost Schottky Reverse Leakage

0.02

2

μA

Minimum Boost Voltage (Note 4)

l

1.5

2.1

V

BOOST Pin Current

22

35

mA

RUN/SS Pin Current

5

10

μA

RUN/SS Input Voltage High

2.5

V

RUN/SS Input Voltage Low

0.2

V

PG Threshold Offset from Feedback Voltage

100

mV

PG Hysteresis

12

mV

PG Leakage

0.1

1

μA

PG Sink Current

l

100

600

μA

SYNC Low Threshold

0.5

V

SYNC High Threshold

0.7

V

SYNC Pin Bias Current

0.1

μA

ELECTRICAL CHARACTERISTICS