XC9128B45CDR-G

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DC DC switching regulators offer efficient, switch controlled voltage and current regulation. The XC9128B45CDR-G is part of ON Semiconductor’s DC-DC buck switching regulators with a wide input range of 4.5V to 32V and a fixed output voltage of 5V. It is a high-efficiency synchronous rectifier buck switching regulator that provides a low-ripple output voltage, low current consumption and features a pulse width modulation (PWM) dimming control circuit. It also has a wide range of operating temperature ranging from -40°C to +105°C.

The XC9128B45CDR-G is well-suited for applications in industrial, communications, computer, and battery powered equipment such as power supplies. In many of these applications such as in battery-powered equipment, it can be used to maintain a constant voltage in order to ensure device and system performance and to minimize battery drain. It is also suitable for any place where space is at a premium and the higher efficiency levels of the XC9128B45CDR-G yield improved thermal design and reduce the size of cooling fans for thermal management and system performance.

The XC9128B45CDR-G uses an advanced PWM controller in constant frequency, current mode topology to achieve high performance, low-noise, and high efficiency power conversion in a wide range of applications. The device integrates gate drivers that drive two external N-channel MOSFETs in a synchronous rectifier buck topology. The control algorithm and advanced protection features provide maximum safety and reliability in a variety of operating conditions. The XC9128B45CDR-G also features a spread spectrum frequency modulation (SSFM) option, which makes it suitable for computer and other applications where low noise operation is required.

The buck-converter is an important type of DC-DC converter for uses in power management systems. It consists of a power MOSFET switch, a diode, a storage capacitor and an inductor, together with control logic. With this configuration the XC9128B45CDR-G can provide a constant regulated output from a wide input voltage range. The control logic causes the switch to turn on and off with a certain frequency and duty cycle that is proportional to the voltage difference between the output and the input. As the input voltage increases, the duty cycle of the switch increases and more current is allowed to flow through the system. This enables the regulator to achieve fast response and dynamic stability.

The efficiency of the XC9128B45CDR-G is greater than 90%, with up to 93% load efficiency. This high efficiency allows for more power to be delivered to the load with less waste heat. The input capacitance is minimized and the built in overvoltage, overcurrent and temperature protection are helpful features in providing maximum safety and reliability to the system. With its small footprint and wide operating temperature range, the XC9128B45CDR-G is an ideal choice for powering nearly any type of production system or other high performance application.

The XC9128B45CDR-G is an efficient and reliable DC-DC switching regulator for applications where a steady and reliable power supply is required. Its versatile PWM control circuit and its wide operating temperature range make it a reliable and attractive choice for designers of audio, automotive, industrial, communications, computer, and battery powered equipment.

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