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NX9548 - Time Synchronous Buck Regulator

Datasheet Summary

Description

The NX9548 is a synchronous buck switching regulator with 21 mΩ internal N-channel MOSFETs, primarily intended for portable (mobile) applications.

The NX9548 operates from 4.5 V to 24 V, and the output voltage range is from 0.75 V to 5 V, with output currents as high as 8 A.

Features

  • overcurrent protection (OCP), feedback under-voltage lockout (FB UVLO), and overvoltage protection (OVP). It also includes an integrated bootstrap Schottky diode, and provides lowvoltage (5 V) gate-drive capability. In addition it provides a Power Good indicator and has adaptive dead time. Features.
  • Adaptive COT Control.
  • Adjustable, Constant Switching Frequency up to 1 MHz.
  • Extremely Low-RDSON N-MOSFETs.
  • Bus Voltage 4.5 V to 24 V.
  • Selectable Diode Emulation Mode (PSM Mo.

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Datasheet Details

Part number NX9548
Manufacturer Microsemi
File Size 897.78 KB
Description Time Synchronous Buck Regulator
Datasheet download datasheet NX9548 Datasheet
Additional preview pages of the NX9548 datasheet.

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Full PDF Text Transcription

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NX9548 4.5 V to 24 V, 8 A Adaptive Constant On Time (COT) Synchronous Buck Regulator Description The NX9548 is a synchronous buck switching regulator with 21 mΩ internal N-channel MOSFETs, primarily intended for portable (mobile) applications. The NX9548 operates from 4.5 V to 24 V, and the output voltage range is from 0.75 V to 5 V, with output currents as high as 8 A. It can be selected to operate in synchronous mode, or non-synchronous (diode emulation or PSM) mode at light loads, to improve efficiency. Adaptive constant on time (COT) control provides extremely fast transient response to line and load steps, while at the same time providing near-constant switching frequency over a wide input voltage range. The frequency is also externally adjustable.
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