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LTC3400/LTC3400B

3400fa

VIN Voltage ................................................. – 0.3V to 6V

SW Voltage ................................................. – 0.3V to 6V

SHDN, FB Voltage ....................................... – 0.3V to 6V

VOUT ........................................................... – 0.3V to 6V

Operating Temperature Range (Note 2) .. – 30

°C to 85°C

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

°C to 125°

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

°C

ORDER PART

NUMBER

S6 PART MARKING

TJMAX = 125°C, θJC = 102°C/W

LTWK

LTUN

LTC3400ES6

LTC3400BES6

(Note 1)

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

of a device may be impaired.

Note 2: The LTC3400E/LTC3400BE are guaranteed to meet performance

specifications from 0

°C to 70°C. Specifications over the –30°C to 85°C

operating temperature range are assured by design, characterization and

correlation with statistical process controls.

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VOUT = 3.3V, unless otherwise specified.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Start-Up Voltage

ILOAD = 1mA

0.85

Minimum Operating Voltage

SHDN = VIN (Note 4)

0.5

0.65

Output Voltage Adjust Range

2.5

Feedback Voltage

1.192

1.23

1.268

Feedback Input Current

VFB = 1.25V (Note 3)

Quiescent Current (Burst Mode Operation)

VFB = 1.4V (Note 5), LTC3400 Only

µA

Quiescent Current (Shutdown)

VSHDN = 0V, Not Including Switch Leakage

0.01

µA

Quiescent Current (Active)

Measured On VOUT

300

500

µA

NMOS Switch Leakage

VSW = 5V

0.1

µA

PMOS Switch Leakage

VSW = 0V

0.1

µA

NMOS Switch On Resistance

VOUT = 3.3V

0.35

Ω

VOUT = 5V

0.20

Ω

PMOS Switch On Resistance

VOUT = 3.3V

0.45

Ω

VOUT = 5V

0.30

Ω

NMOS Current Limit

600

850

Burst Mode Operation Current Threshold

LTC3400 Only (Note 3)

Current Limit Delay to Output

(Note 3)

Max Duty Cycle

VFB = 1.15V

Switching Frequency

0.95

1.2

1.5

MHz

0.85

1.2

1.5

MHz

SHDN Input High

SHDN Input Low

0.35

SHDN Input Current

VSHDN = 5.5V

0.01

µA

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

Note 3: Specification is guaranteed by design and not 100% tested in

production.

Note 4: Minimum VIN operation after start-up is only limited by the

battery’s ability to provide the necessary power as it enters a deeply

discharged state.

Note 5: Burst Mode operation IQ is measured at VOUT. Multiply this value

by VOUT/VIN to get the equivalent input (battery) current.

SW 1

GND 2

FB 3

6 VIN

5 VOUT

4 SHDN

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC SOT-23

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

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