Switching regulator has ultrawide input range

Accepts inputs from 3.6 to 25V, making it suitable for regulating power from a wide variety of sources, including protected automotive batteries, industrial supplies and unregulated wall adapters.

Available now from Linear Technology, the LT1913 is a 3.5A, 25V step-down switching regulator packaged in a 3 x 3mm DFN.

The LT1913 accepts inputs from 3.6 to 25V, making it suitable for regulating power from a wide variety of sources, including protected automotive batteries, industrial supplies and unregulated wall adapters.

Its 4.6A internal switch can deliver up to 3.5A of continuous output current at voltages as low as 0.79V.

The LT1913's switching frequency is user programmable from 200kHz to 2.4MHz, enabling designers to optimise efficiency while avoiding critical noise-sensitive frequency bands and keeping externals small.

The combination of its high switching frequency and tiny 3 x 3mm DFN package ensure a very compact solution foot print.

The LT1913 includes a high-efficiency 4.6A, 95mohm switch that can run at up to 90% efficiency.

The necessary boost diode, oscillator, control and logic circuitry are integrated into a single chip.

Special design techniques used in the LT1913 enable high efficiency over a wide input voltage range, and the device's current mode topology enables fast transient response and excellent loop stability.

Other features include external synchronisation (from 250kHz to 2MHz), a power good flag and soft-start capability.

Pricing for the LT1913EDD starts at US $3.65 each for 1000-piece quantities.

The LT1913IDD is tested and guaranteed to operate from a -40 to +125C operating junction temperature and is priced at US $4.38 each in 1000-piece quantities.

Both versions are available from stock.

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