1

LTC3426

3426fa

1.2MHz Step-Up DC/DC

Converter in SOT-23

■

Local 3.3V or 5V Supply

The LTC

output voltage of up to 5.5V from an input voltage as low

as 1.6V. Ideal for applications where space is limited, it

switches at 1.2MHz, allowing the use of tiny, low cost and

low profile external components. Its internal 2A, 100m

Ω

NMOS switch provides high efficiency even at heavy load,

while the constant frequency, current mode architecture

results in low, predictable output noise that is easy to filter.

Antiringing circuitry reduces EMI concerns by damping

the inductor while in discontinuous mode, and internal

soft-start eases inrush current worries. Internal frequency

compensation is designed to accommodate ceramic out-

put capacitors, further reducing noise. The device features

very low shutdown current of 0.5

µA.

The LTC3426 is available in the 6-lead SOT-23 package.

3.3V to 5V Boost Converter

Efficiency

SW

2.2

µH

3.3V

LTC3426

SHDN

22

µF

10

µF

5V

800mA

3426 TA01

FB

OFF ON

GND

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

LOAD CURRENT (mA)

1

70

75

80

85

90

10

100

1000

3426 TA01b

65

60

55

50

95

100

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Protected by U.S. Patents, including 6498466, 6611131