2

LTC3440

3440fb

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Start-Up Voltage

●

2.4

2.5

V

Input Operating Range

●

2.5

5.5

V

Output Voltage Adjust Range

●

2.5

5.5

V

Feedback Voltage

●

1.196

1.22

1.244

V

Feedback Input Current

1

50

nA

Quiescent Current, Burst Mode Operation

25

40

μA

Quiescent Current, Shutdown

SHDN = 0V, Not Including Switch Leakage

0.1

1

μA

Quiescent Current, Active

600

1000

μA

NMOS Switch Leakage

Switches B and C

0.1

5

μA

PMOS Switch Leakage

Switches A and D

0.1

10

μA

NMOS Switch On Resistance

Switches B and C

0.19

Ω

PMOS Switch On Resistance

Switches A and D

0.22

Ω

Input Current Limit

●

1A

Maximum Duty Cycle

Boost (% Switch C On)

●

55

75

%

Buck (% Switch A On)

●

100

%

Minimum Duty Cycle

●

0%

Frequency Accuracy

●

0.8

1

1.2

MHz

MODE/SYNC Threshold

0.4

2

V

MODE/SYNC Input Current

0.01

1

μA

(Note 1)

SW1, SW2 Voltage ..................................... – 0.3V to 6V

MODE/SYNC Voltage .................................. – 0.3V to 6V

ORDER PART

NUMBER

LTC3440EDD

The

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

DD

PART MARKING

LBKT

1

2

3

4

5

MODE/SYNC

SW1

SW2

GND

10

9

8

7

6

FB

SHDN/SS

TOP VIEW

MS PACKAGE

10-LEAD PLASTIC MSOP

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

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

Storage Temperature Range ................. – 65

°C to 125°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ORDER PART

NUMBER

LTC3440EMS

MS

PART MARKING

LTNP

TOP VIEW

DD PACKAGE

10-LEAD (3mm

× 3mm) PLASTIC DFN

EXPOSED PAD (PIN 11) IS GND

MUST BE SOLDERED TO PCB

10

9

6

7

8

4

5

3

2

1

FB

SHDN/SS

MODE/SYNC

SW1

SW2

GND

11

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF

Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/