LTC3443

2

sn3443 3443fs

SW1, SW2 Voltage

DC ...........................................................– 0.3V to 6V

Pulsed < 100ns ...................................... – 0.3V to 7V

SHDN/SS, MODE/SYNC Voltage ................. – 0.3V to 6V

Operating Temperature Range (Note 2) .. – 40°C to 85°C

Maximum Junction Temperature (Note 4) ........... 125°C

Storage Temperature Range ................ – 65°C to 125°C

ORDER PART

NUMBER

(Note 1)

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

Consult LTC Marketing for parts specified with wider operating temperature ranges.

LTC3443EDE

EXPOSED PAD IS PGND (PIN 13)

MUST BE SOLDERED TO PCB

DE PART MARKING

3443

12

11

10

9

8

7

1

2

3

4

5

6

FB

MODE/SYNC

SHDN/SS

GND

PGND

SW1

SW2

PGND

TOP VIEW

13

DE12 PACKAGE

12-LEAD (4mm × 3mm) PLASTIC DFN

The

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Start-Up Voltage

●

2.3

2.4

V

Output Voltage Adjust Range

●

2.4

5.25

V

Feedback Voltage

●

1.19

1.22

1.25

V

Feedback Input Current

1

50

nA

Quiescent Current—Burst Mode Operation

28

45

µA

Quiescent Current—SHDN

0.1

1

µA

Quiescent Current—Active

MODE/SYNC = 0V (Note 3)

520

900

µA

NMOS Switch Leakage

Switches B and C

0.1

7

µA

PMOS Switch Leakage

Switches A and D

0.1

10

µA

NMOS Switch On Resistance

Switches B and C

0.10

Ω

PMOS Switch On Resistance

Switches A and D

0.11

Ω

Input Current Limit

●

2

3.2

A

Max Duty Cycle

Boost (% Switch C On)

●

70

88

%

Buck (% Switch A In)

●

100

%

Min Duty Cycle

●

0%

Frequency Accuracy

●

510

600

690

kHz

MODE/SYNC Threshold

●

0.4

1.4

V

MODE/SYNC Input Current

0.01

1

µA

90

dB

Error Amp Source Current

14

µA

Error Amp Sink Current

300

µA

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