LTC3429 datasheet(2/12 Pages) LINER

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LTC3429/LTC3429B

3429fa

VIN Voltage .............................................. –0.3V to 4.4V

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

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

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

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

Storage Temperature Range ................... – 65°C to 150°

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

ORDER PART

NUMBER

S6 PART MARKING

TJMAX = 125°C, θJC = 102°C/W

LTH5

LTBMS

LTC3429ES6

LTC3429BES6

(Note 1)

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

of a device may be impaired.

Note 2: The LTC3429ES6/LTC3429BES6 are 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.

The

● 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, VOUT = 0V

0.85

Minimum Operating Voltage

SHDN = VIN (Note 3)

0.5

0.65

Output Voltage Adjust Range

(Note 5)

2.5

Feedback Voltage

●

1.192

1.230

1.268

Feedback Input Current

VFB = 1.25V

Quiescent Current (Burst Mode Operation)

VFB = 1.4V (Note 4)

µA

Quiescent Current (Shutdown)

VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V

0.01

µA

Quiescent Current (Active)

Measured on VOUT, Nonswitching

380

550

µA

NMOS Switch Leakage

VSW = 5V

0.1

µA

PMOS Switch Leakage

VSW = 5V, VOUT = 0V

0.1

µA

NMOS Switch On Resistance

0.35

Ω

PMOS Switch On Resistance

0.45

Ω

NMOS Current Limit

600

850

Burst Mode Operation Current Threshold

L = 4.7µH (LTC3429 Only)

1.25

Current Limit Delay to Output

Max Duty Cycle

VFB = 1.15V

●

Switching Frequency

●

380

500

620

kHz

SHDN Input High

SHDN Input Low

0.35

SHDN Input Current

VSHDN = 5.5V

0.01

µA

Soft-Start Time

SHDN to 90% of VOUT

2.5

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

Note 3: 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 4: Burst Mode operation IQ is measured at VOUT. Multiply this value

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

Note 5: For applications where VOUT > 4.3V, an external Schottky diode is

required. See the Applications Information.

SW 1

GND 2

FB 3

6 VIN

5 VOUT

4 SHDN

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

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

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