UC28023DWG4

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UC28023DWG4 is a current-mode PWM controller designed for DC-DC regulator applications. It is classified as a PMIC (Power Management Integrated Circuit), Voltage Regulator, and DC DC Switching Controller. The UC28023DWG4 offers system reliability and control, low noise, and cost-effective solutions in a small, thermally-efficient package.

The UC28023DWG4 features a soft-start, programmable overvoltage protection (OVP), pre-biased load start-up, a selectable burst mode operation, and a programmable, low ripple, high efficiency, fault-protected output power regulator. Other features such as a temperature-monitoring circuit, output over-current and over-voltage protection, and an integrated error amplifier with adjustable DC current-limit function are incorporated to provide optimal system reliability and control.

The UC28023DWG4 can be used in a variety of applications that require a switching regulator. These include computers, communications/networking, industrial control and instrumentation, automotive electronics, and audio/video playback. It can be used for single- and multiple-phase synchronous Buck (step-down), Buck-boost, boost, and SEPIC (single ended primary inductor converter) topologies.

Applications that require a low-noise, cost-effective solution for powering mobile devices will find the UC28023DWG4 ideal. It offers improved thermal performance and dissipation in a small package. Furthermore, due to its many protections, the UC28023DWG4 is robust against many system failure modes, making it a reliable choice for high-performance applications.

The UC28023DWG4 features an enhanced high-voltage current-mode control scheme optimized for improved efficiency and minimized output noise. The integrated constant frequency oscillator ensures excellent current-mode control across all conditions. In addition, it features an adjustable pre-biased start-up circuit which allows the power supply to start-up with a large pre-biased output capacitor and no external circuit components.

The UC28023DWG4 also features selectable burst mode operation to help reduce system standby power consumption. In addition, the integrated over-voltage protection feature helps prevent system damage from output voltage levels rising above a predetermined voltage. The fault-protected output power regulator helps maintain high efficiency by reducing power consumption and maximizing system reliability.

The UC28023DWG4 also incorporates an error amplifier with an adjustable DC current-limit function, making the system more robust in the event of overload. An external temperature-sensing circuit provides feedback on overheating, allowing the system to shut down for protection. The device also includes an adjustable soft-start, allowing the output voltage to ramp up gradually, minimizing excessive inrush current during start-up.

The UC28023DWG4 is an ideal solution for powering mobile devices due to its low-noise, cost-effective design. Its fault-protected output, soft-start and OVP features provide enhanced system protection. Furthermore, its small size and thermally-efficient package make it an excellent choice for applications with space constraints. Finally, the UC28023DWG4’s wide input and output voltage range, burst mode operation, and pre-biased start-up features make it a versatile and reliable solution for many applications.

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