ISL6522CVZ

The ISL6522CVZ is a high-performance multi-phase pulse width modulated (MPPWM) controller designed for use in switching mode DC/DC power supply applications. Developed by Intersil Corporation, it is designed to operate on input voltages from 2V to 24V, effectively supporting a range of automotive and computing applications. The device features built-in loop compensation, operating frequency dithering, and digital power-good. It also features Intersil’s proprietary Pre-Charge Voltage Logic, to ensure proper switching in low-voltage applications. This paper will discuss the application fields, working principle and features of the ISL6522CVZ.

Application Fields

The ISL6522CVZ is ideal for several different applications that require a regulated power supply. These applications are mainly to be used in automotive, computing, communication and industrial applications. Automotive applications include power steering, electric power steering, DC/DC converters, and automotive audio systems. Computing applications include microprocessors, low-power embedded systems, and industrial-grade server cards. Communication systems require it to drive high-voltage DC/DC converters, RF modules, and cellular base stations. Finally, the power supply is suitable for use in industrial-grade applications, such as programmable logic controllers, as well as in medical and avionic devices.

Working Principle

The ISL6522CVZ operates in a non-isolated buck configuration, using pulse width modulation (PWM) control. It uses current-mode control with peak current-mode control. This controller has built-in loop compensation and can be programmed to operate over a wide frequency range, from 200 kHz to 1MHz. The synchronous rectifier is driven via a charge pump, which reduces stress on the low voltage side MOSFETs. The duty cycle is adjusted in order to maintain the output voltage. The power-on reset (POR), under-voltage lockouts (UVLO) and the over-current protection (OCP) functions ensure a safe and stable operating environment. The device integrates Intersil’s Pre-Charge Voltage Logic, which provides a controlled rise time for safe operation in low voltage applications.

Features

• 2V to 24V voltage range
• Operating frequency from 200 kHz to 1 MHz
• Built-in loop compensation
• Peak current-mode control with synchronous rectification
• Pre-charge voltage logic
• Power-on reset, under-voltage lockout, and over-current protection
• Small 2mm x 3.5mm 8-pin plastic QFN package option

In conclusion, the ISL6522CVZ is a multi-phase pulse width modulated (MPPWM) controller designed to operate over a wide voltage range. It is suitable for use in several different applications, such as automotive, computing, communication, and industrial-grade applications. It features built-in loop compensation, operating frequency dithering, and digital power-good. Intersil’s Pre-Charge Voltage Logic provides a controlled rise time for low voltage applications, and it also features power-on reset, under-voltage lockout, and over-current protection. The device is available in small, easy to integrate 2mm x 3.5mm 8-pin plastic QFN package option.