XRP7674IDTR-F

EXAR  XRP7674IDTR-F  直流-直流开关降压逐步递减稳压器, 可调, 4.5V-18V输入, 925mV-16V输出, 2A输出, SOIC-8

The is a synchronous PFM/PWM Step-down Regulator with improved light current load efficiency. A wide 4.5 to 18V input voltage range allows for single supply operations from industry standard 5 and 12V power rails. With a 340kHz constant operating frequency and integrated high and low-side 100/100mR MOSFETs, the XRP7674 reduces the overall component count and solution footprint. Current-mode control provides fast transient response and cycle-by-cycle OCP. An adjustable soft-start prevents inrush current at turn-ON and in shutdown mode the supply current drops to 0.1µA. At light current loads, the XRP7674 operates in discontinuous conduction mode DCM and is complemented by a pulse frequency modulation mode PFM to provide excellent conversion efficiency. Built-in output overvoltage open load, over temperature, cycle-by-cycle overcurrent, undervoltage lockout UVLO and hiccup mode short-circuit protection insures safe operation under abnormal operating conditions.

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Light-load efficiency

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Programmable soft-start and enable function

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PWM current-mode control - 340kHz Constant operations and up to 95% efficiency