IXD3235A18CMR-G

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The DC DC Switching Regulators category of power management solutions is arguably the broadest of PMIC offerings. It consists of power solutions which manage and adjust voltage, current, and power load to ensure that a specific set of requirements are met. All DC DC Switching Regulators will fulfill one or more of the following roles: provide power delivery and control to appliance loads; regulate voltage, current, and power flows; provide overload protection; and offer an adjustable output. Within this category, the IXD3235A18CMR-G stands out as one of the most trusted and reliable solutions in these areas of power management. This application note will detail the IXD3235A18CMR-G’s application field and its working principle.

Application Field

The IXD3235A18CMR-G is a type of DC DC switching regulator, which provides a step-down, adjustable voltage output from a VIN and VOUT input respectively. It is suited to a variety of applications due to its ability to output a highly adjustable voltage up to 18V with a fairly low output ripple of 40mVpp. The IXD3235A18CMR-G is also notable for its patent pending synchronous gate drive which significantly reduces board space and provides improved electromagnetic interference (EMI) performance.

The IXD3235A18CMR-G is designed for general purpose DC/DC power conversion applications, such as providing a regulated output voltage for industrial and automotive products, including applications like telecom base stations, navigation systems, in-vehicle infotainment systems, home audio systems and portable medical devices. This DC DC Switching Regulator can also be used for distributed power architectures and system-in-package applications.

Working Principle

The IXD3235A18CMR-G works using high-frequency pulse-width modulation (PWM) control to regulate the output voltage from the input voltage. The topology used in this device is a synchronous buck type and it operates by using a pair of synchronized MOSFETs for switching. The IXD3235A18CMR-G uses a serial digital control interface (I2C) to simplify the design of power supply systems by providing a digital interface for external circuit components. Using this I2C (or SMBus) interface, the device can interface with an external microcontroller or display driver to control its operation.

The IXD3235A18CMR-G features a patent pending synchronous gate drive which makes use of two signal loops to reduce cost and board size. It also includes integrated loop compensation and cycle-by-cycle current limit for greater reliability. Other features include overload protection, thermal shutdown, and a power good signal, all of which provide added protection to the system.

In summary, the IXD3235A18CMR-G is a DC DC Switching Regulator with an integrated synchronous gate driver that offers adjustable voltage up to 18V and a highly-efficient, low ripple voltage output. With its serial digital control interface, adjustable output settings and added protection features, it is suitable for use in a variety of DC/DC power conversion applications.

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