RT7232GQW

RT7232GQW application field and working principle

RT7232GQW is a high performance, low quiescent current, 200mA buck-boost DC/DC switching regulator with Current Limit, Low Voltage Lockout (LVO) and Fixed Frequency PWM Control Mode. With a wide 2.6V to 12V input range and adjustable 1.2V to 11.6V output range, the RT7232GQW is ideal for a wide range of applications requiring variable input voltage, such as portable battery powered devices and automotive systems.

It is highly efficient with up to 95% conversion efficiency, and the combination of low quiescent current and low shutdown current makes it a perfect choice for modern power management solutions. The RT7232GQW also boasts a high switching frequency of 1.5MHz, minimizing external component size and greatly improving efficiency.

RT7232GQW Application Fields

• Smartphones and Tablets
• High-performance applications
• Power Management ICs
• Variable input voltage applications
• Dimensions & outputs for devices with cramped spaced

RT7232GQW Working Principle

The core principle of the RT7232GQW is the combination of a buck-boost DC/DC converter and a PWM control circuit. The buck-boost converter is fabricated using high-performance integrated circuits, and is based on the principle of a boost-type controller. Its input voltage is converted and regulated to a constant output voltage, determined by the external voltage divider and feedback resistors.

The PWM control circuit is based on a fixed frequency oscillator and a PWM comparator design, which outputs a pulse modulated signal. This pulse modulated signal is then fed to the buck-boost converter, which uses it to control the output voltage. The frequency of the PWM signal is determined by the external oscillator and can be set to any frequency up to 1.5 MHz.

The RT7232GQW also features integrated circuitry for current limit protection, thermal overload protection and LVO (low-voltage lockout) protection. The current limit feature provides a threshold for the maximum load current, and the thermal protection feature protects the device from extreme temperatures. The LVO (low-voltage lockout) feature prevents the device from operating if the input voltage is below a predetermined level.

Conclusion

The RT7232GQW is an efficient, low-quiescent current, high-performance buck-boost DC/DC switching regulator with current limit, Low Voltage Lockout (LVO) and Fixed Frequency PWM Control Mode. It is ideal for a range of applications requiring variable input voltage, such as portable battery-powered devices, high-performance applications, and power management ICs. Its combination of low quiescent current and low shutdown current, wide 2.6V to 12V input range, adjustable 1.2V to 11.6V output range, and ability to operate up to 1.5MHz make it a good choice for a variety of applications.