LTC3443

3

sn3443 3443fs

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

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.

ELECTRICAL CHARACTERISTICS

TYPICAL PERFOR A CE CHARACTERISTICS

20mV/DIV

AC-COUPLED

BUCK

BUCK-BOOST

BOOST

2µs/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

100µs/DIV

3443 G03

MODE Transient Response:

Burst Mode Operation to Fixed

Frequency

200mV/DIV

AC-COUPLED

MODE

5V/DIV

500µs/DIV

3443 G03

100mV/DIV

AC-COUPLED

MODE

5V/DIV

500µs/DIV

3443 G03

MODE Transient Response:

Fixed Frequency to Burst Mode

Operation