LTC3443

3

3443fa

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 LTC3443E is guaranteed to meet performance specifications

from 0

°C to 70°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 measurements are performed when the outputs are not

switching.

Note 4: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. Junction

temperature will exceed 125

°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may result in device degradation or failure.

TYPICAL PERFOR A CE CHARACTERISTICS

20mV/DIV

AC-COUPLED

BUCK

BUCK-BOOST

BOOST

2

μs/DIV

3443 G02

Li-Ion to 3.3V Efficiency

OUTPUT CURRENT (mA)

0.1

40

50

60

70

80

1.0

10

100

1000

3443 G01

30

20

10

0

90

100

Burst Mode

OPERATION

Load Transient Response,

100mA to 1A

100mV/DIV

1A

100mA

100

μs/DIV

3443 G03

MODE Transient Response:

Burst Mode Operation to Fixed

Frequency

200mV/DIV

AC-COUPLED

MODE

5V/DIV

500

μs/DIV

3443 G03

100mV/DIV

AC-COUPLED

MODE

5V/DIV

500

μs/DIV

3443 G03

MODE Transient Response:

Fixed Frequency to Burst Mode

Operation

The

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SHDN/SS Threshold

When IC is Enabled

●

0.4

1

1.4

V

SHDN/SS Threshold

When EA is at Max Boost Duty Cycle

2

2.4

V

SHDN/SS Input Current

0.01

1

μA