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Buck Converter
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  • Model No. :

    CX8572

  • Withstand voltage :

    36V

  • Output voltage :

    3-28V ADJ

  • Output current :

    5A

  • Working mode :

    Buck

  • Packaging :

    TDFN3X3 -12
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Datesheet

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  • product details

Overview

The CX8572 is a constant‑voltage constant‑current step‑down DC‑DC converter featuring simple implementation, outstanding performance and high stability and reliability.

The CX8572 is a PWM controller chip designed for high‑performance synchronous step‑down DC‑DC applications. It supports a wide DC input voltage range of 4.5‑36 V, with adjustable DC output voltage from 3‑28 V, and delivers precise constant‑voltage and constant‑current step‑down PWM regulation.

The CX8572 integrates multiple protection functions: cycle‑by‑cycle current limiting, short‑circuit protection, under‑voltage lockout (UVLO) and thermal shutdown. The built‑in soft‑start function prevents inrush current during power‑on.

Adopting a current‑mode control scheme, the CX8572 achieves fast transient response. Its internal compensation eliminates external compensation components and simplifies design. External shutdown is realized by pulling the EN pin logic level low; in standby mode, the supply current is approximately 20 µA.


Features

  •  Wide DC input voltage: 4.5 V‑36 V 

  • Adjustable DC output voltage: 3.0‑28 V 

  • 5 A continuous output current capability 

  • Supports up to 98% duty cycle 

  • 1 mA quiescent standby current 

  • EN shutdown function: EN = 0 V, 20 µA standby current

  •  Constant‑Voltage (CV) / Constant‑Current (CC) output support 

  • Constant‑current accuracy: ±8% 

  • Constant‑voltage accuracy: ±2% (VFB = 0.8 V) 

  • Built‑in 3 ms soft‑start 

  • On‑chip compensation 

  • Built‑in cable compensation 

  • Input over‑voltage / under‑voltage protection 

  • On‑chip SW cycle‑by‑cycle sensing, including Short‑Circuit Protection (SCP), Over‑Current Protection (OCP) and Over‑Temperature Protection (OTP) 

  • Package: TDFN3×3‑12


Applications

  • Automotive chargers 

  • Power supply for portable devices 

  • Smart power strips


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