RT6222CHGJ6F

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The RT6222CHGJ6F is a member of a family of DC-DC switching regulator controllers that provide step down, step up and inverting functions in a single package. The RT6222CHGJ6F is a faceted MOSFET controller with voltage mode control and integrated (auto-zero) current sensing. The RT6222CHGJ6F operates from an input voltage of 4.5V to 31V and provides either an adjustable or fixed output voltage.

The RT6222CHGJ6F is suitable for a wide range of applications, from medical and general purpose home appliances to industrial or automotive systems. It is well suited for use in designs that require efficient, low noise, low output ripple, high output current and high efficiency.

The RT6222CHGJ6F uses an innovative step-down control loop to achieve fast transient response and excellent line/load regulation. The two pulse width modulation (PWM) control loops are implemented separately, allowing the RT6222CHGJ6F to maintain a constant switching frequency over a wide range of input and output voltage conditions. This feature provides excellent EMI performance and allows the user to select an optimal switching frequency that is not limited by the operating conditions.

The RT6222CHGJ6F has two voltage mode control loops: the inner or primary loop and the outer or feedforward loop. The inner loop is a voltage-mode PWM (VM-PWM) with a fixed frequency set by an internal oscillator. The outer loop is a feedforward path that increases the primary loop’s dynamic response and allows the output voltage to track the input voltage with minimal overshoot or undershoot.

To ensure a noise-free output, the RT6222CHGJ6F includes an integrated current-sensing amplifier to monitor the current flowing through the output FET andthe current flowing through the inductor. The RT6222CHGJ6F also includes a low noise reset circuit to ensure a smooth turn-off of the output FET switch in the event of an overcurrent event.

The RT6222CHGJ6F is ideal for applications that require accurate regulation of the output voltage under varying load conditions and temperatures. The RT6222CHGJ6F operates flawlessly with ceramic and tantalum capacitors. It can also be configured to automatically adjust the switching frequency so as to maintain a constant switching frequency over a wide range of input and output voltages.

Overall, the RT6222CHGJ6F is an ideal solution for designers and developers who require a reliable, cost-effective, feature-rich and power efficient DC-DC switching regulator. It is a versatile and efficient regulator for a wide variety of applications requiring high efficiency, low output noise, low output voltage ripple, and high output current.

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