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Low-output voltage step down converter

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MAXIM Integrated Products, represented by Arrow Electronics , has introduced the MAX1572, the first 800mA, PWM, step-down converter capable of delivering low-output voltages.

It includes a built-in 170ms dc-dc reset output and preset outputs for 0.75V to 2.5V, stepped in 50mV increments.

The small size and minimal external part count is ideal for Smart Phone and PDA applications.

The MAX1572 operates at a high 2MHz and provides precision line and load regulation for the latest CPU and DSP cores. It uses a low-profile 2.2 microhenries inductor and tiny ceramic capacitors.

It has an input range of 2.6V to 5.5V for use with a single lithium-ion battery. Other features include voltage positioning for load transients and analogue soft-start with zero inrush current.

To maximise battery life for hand-held equipment, the quiescent current is only 48 microamp and drops to 0.1 microamp in logic-controlled shutdown.

The MAX1572 comes in a space-saving 12-pin QFN package and is screened for the extended-industrial temperature range (-40°C to +85°C).

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