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Low-voltage, step-down regulator focuses on low-power, compact applications

A low-voltage, step-down regulator with an internal boost switch has been introduced by Maxim Integrated Products.

Designed for space-constrained applications, the MAX17083 integrates dual n-channel MOSFET power switches in a small, 16 mm2 TQFN package that supports a continuous load current up to 5A, the internal 25 mΩ low-side power MOSFETs ensure high efficiency while reducing component count. For further space and cost savings, the MAX17803 eliminates the need for external Schottky diodes, as well as an external boost diode. The small step-down regulator is ideal for ultra-mobile PCs (UMPCs), netbooks, portable gaming devices, and other low-power, compact applications.

The MAX17803 uses a current-mode, fixed-frequency control scheme to provide an easy-to-implement architecture that does not sacrifice transient response. The architecture also provides peak-current-limit protection and operates in pulse-skipping mode to maintain high efficiency under light-load conditions.

The step-down regulator produces an adjustable 0.75 V to 2.7 V output voltage from the system's 3.3 V or 5 V input supply.

Availability and Pricing

The device is available in a space-saving, 4 mm x 4 mm, 24-pin TQFN package, and is fully specified over the -40 to +85 degrees Celsius extended temperature range. Prices start at $2.75 (1000-up, FOB USA). An evaluation kit with recommended external components is available to reduce design time.

Datasheet for: MAX17083

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