LM2670S-3.3/NOPB

降压开关稳压器, 固定, 8V-40V输入, 3.3V和3A输出, TO-263-7

The is a step-down Voltage Regulator provides all of the active functions for a step-down buck switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency >90% is obtained through the use of a low on-resistance DMOS power switch. The simple switcher concept provides for a complete design using a minimum number of external components. The switching clock frequency can be provided by an internal fixed frequency oscillator 260KHz or from an externally provided clock in the range of 280 to 400kHz which allows the use of physically smaller sized components. A family of standard inductors for use with the LM2670 are available from several manufacturers to greatly simplify the design process. The external Sync clock provides direct and precise control of the output ripple frequency for consistent filtering or frequency spectrum positioning.

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Efficiency up to 94%

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Simple and easy to design with using off-the-shelf external components

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150mR DMOS output switch

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50µA Standby current when switched OFF

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±2% Maximum output tolerance over full line and load conditions