DESCRIPTION
The LTC®3426 step-up switching regulator generates an 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, 100mΩ 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.

FEATURES
■ Internal 2A MOSFET Switch
■ 1.2MHz Switching Frequency
■ Integrated Soft-Start
■ Low 1.6V VIN Operation
■ Low RDS(ON) Switch: 100mΩ at 5V Output
■ Delivers 5V at 800mA from a 3.3V Input
■ Delivers 3.3V at 800mA from a 2.5V Input
■ Uses Small, Low Profile External Components
■ Low Profile (1mm) SOT-23 (ThinSOTTM) Package

APPLICATIONS
■ White LED Driver Supply
■ Local 3.3V or 5V Supply
■ Battery Back-Up