LTC3443 Linear Technology, LTC3443 Datasheet - Page 3

• Manufacturer Part Number: LTC3443
• Description: High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
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.
TYPICAL PERFOR A CE CHARACTERISTICS
100
90
80
70
60
40
30
20
10
50
0
0.1
Li-Ion to 3.3V Efficiency
Burst Mode
OPERATION
AC-COUPLED
20mV/DIV
V
IN
1.0
V
OUTPUT CURRENT (mA)
= 2.7V
OUT
V
I
V
OUT
OUT
OUT
= 1A
V
10
= 3.3V
IN
Ripple at 1A Load
= 3.3V
V
IN
= 4.2V
100
W
2µs/DIV
3443 G01
U
1000
AC-COUPLED
200mV/DIV
5V/DIV
MODE
3443 G02
V
OUT
MODE Transient Response:
Burst Mode Operation to Fixed
Frequency
V
V
I
BUCK
V
BUCK-BOOST
V
BOOST
V
OUT
OUT
IN
IN
IN
IN
= 3.3V
= 4.2V
= 3.3V
= 2.7V
= 30mA
= 3.3V
500µs/DIV
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.
100mV/DIV
100mA
V
OUT
1A
(T
3443 G03
Load Transient Response,
100mA to 1A
A
= 25°C unless otherwise specified)
AC-COUPLED
100mV/DIV
5V/DIV
MODE
V
OUT
100µs/DIV
MODE Transient Response:
Fixed Frequency to Burst Mode
Operation
V
V
I
OUT
OUT
IN
= 3.3V
= 30mA
= 3.3V
www.DataSheet4U.com
500µs/DIV
3443 G03
LTC3443
sn3443 3443fs
3
3443 G03