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LTC3426

1.2MHz Step-Up DC/DC Converter in SOT-23

Linear Technology 

LTC3426

ABSOLUTE AXI U RATI GS

(Note 1)

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) .. – 40°C to 85°C

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

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

UW U

PACKAGE/ORDER I FOR ATIO

TOP VIEW

SW 1

GND 2

FB 3

6 VIN

5 VOUT

4 SHDN

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

TJMAX = 125°C, θJA = 165°C/W, θJC = 102°C/W

ORDER PART NUMBER S6 PART NUMBER

LTC3426ES6

LTAJT

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/

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

CO VERTER CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 1.8V, VOUT = 3.3V, unless otherwise specified.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

Output Voltage Adjust Range

SHDN = VIN

1.6

V

2.25

5

V

Feedback Voltage

● 1.173

1.22

1.247

V

Feedback Input Current

Quiescent Current (Shutdown)

Quiescent Current

Switch Leakage

Switch On Resistance

Current Limit

VFB = 1.23V

VSHDN = 0V, Not Including Switch Leakage

SHDN = VIN, Not Switching

VSW = 5V

VOUT = 3.3V

VOUT = 5V

●

2

0.1

µA

1

µA

600

1000

µA

0.2

10

µA

0.11

Ω

0.10

Ω

2.3

A

Maximum Duty Cycle

Switching Frequency

VFB = 1.15V

80

85

● 0.85

1.2

%

1.5

MHz

SHDN Input High

1

V

SHDN Input Low

0.4

V

SHDN Input Current

SHDN = 5.5V

1

µA

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC3426 is guaranteed to meet performance specifications

from 0°C to 85°C. Specifications over the –40°C to 85°C operating

temperature are assured by design, characterization and correlation with

statistical process controls.

Note 3: 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 impair device reliability.

3426fa

2

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