ISL6307CRZ

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The ISL6307CRZ is a DC-DC synchronous buck controller designed for low-voltage/high-current applications, providing a wide range of output voltage and current options. This controller is ideal for applications where space, efficiency and design flexibility are key design considerations.

The ISL6307CRZ operates in either current-mode, constant on-time or voltage-mode control, providing a high level of dynamic current control and efficiency while operating over a wide input-voltage range. Its on-chip driver circuit ensures minimal external component count and its slew-rate-controlled PWM output pin provides excellent line and load regulation, eliminating the need for external voltage-feedback compensation. The low operating current minimizes power consumption in active standby conditions without the need for separate POR logic. The addition of external bad block detection logic ensures noisy power-supply conditions are quickly detected thus preventing unexpected output errors.

Benefits of the ISL6307CRZ include its wide operating frequency range, low ripple and noise, and fast transient response. Its low quiescent current also helps to extend battery life and decrease power consumption during active power standby modes. Outputs may be synchronised to an external clock source, enabling multi-output applications.

Applications of the ISL6307CRZ include:

• Computer CPUs, GPUs, and other active voltage regulators
• Telecommunications and industrial power systems
• DC motor speed motor controllers
• DC-DC power supplies
• Set-top boxes, TVs, and displays
• Motherboards and server power supplies

The basic operating principle of the ISL6307CRZ is as follows: an external clock signal is used to control the switching of the output stage, turning the power device (a MOSFET) on and off. When the power device is on, current is transferred from the input of the circuit to the output; when it is off, the output is disconnected from the input, thus controlling the overall output voltage. The input signal is also compared to a reference voltage to control the amount of current being transferred, thereby controlling the output voltage. The output voltage is further influenced by the external and on-chip components of the circuit, such as resistors, capacitors, and the input voltage, as well as the gain of the amplifiers used in the circuit.

The ISL6307CRZ is designed to be a low power and high efficiency DC-DC converter and is capable of working with both linear and switching inputs. The wide range of output voltage (4.4V to 24V) and current ratings (up to 30A) enable this device to be used in a variety of different applications. Additional features such as soft-start, internal current limiting, and external bad block detection make the ISL6307CRZ an ideal solution for safely regulating battery and system power in a range of diverse applications.

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