ISL85009FRZ-T

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The ISL85009FRZ-T is a robust, highly efficient, low quiescent current DC-DC converter that targets a wide variety of application segments, including handheld, industrial and automotive sectors. It is designed to deliver up to 25W of power, meeting the needs of increasing power requirements of today\'s applications. This DC-DC converter incorporates input and output voltage range of 1.5V to 34V, which can be used in applications such as fan controllers, high power lighting, and Power over Ethernet with high efficiency. The ISL85009FRZ-T is part of the ISL85009 family of DC-DC switching regulators and is grouped under PMIC (Power Management Integrated Circuit), Voltage Regulators and DC DC Switching Regulators.

The ISL85009FRZ-T converter is a synchronous, step-down, DC-DC converter that uses a PMOS/NMOS synchronous rectifier designed for a wide input voltage range and higher efficiency, contributing to lower thermal variability and higher reliability. Its wide operating temperature range of -40℃ to +125℃ makes it an ideal choice for automotive and harsh industrial applications. The ISL85009FRZ-T is equipped with various protection features like Thermal Shutdown, SoftStart, Over-Voltage Protection (OVP) and Under-Voltage Protection (UVP), Over Current Protection (OCP) and Short Circuit Protection (SCP).

The major advantage of the ISL85009FRZ-T converter is its efficiency of up to 95%, which results in significantly lower input current and lower temperature. This makes this DC-DC converter an ideal solution for applications which require higher output power in a smaller form factor. The converter also has other features such as ultra-low quiescent current, low output ripple, low switching noise and a fast transient response for improving power system performance. Its Low Dropout (LDO) mode provides the flexibility of supplying multiple outputs from the same input voltage.

Under normal operating conditions, the ISL85009FRZ-T converter will be in the buck converter mode. In this mode, the power is transferred from the input to the output through a MOSFET switch configured as a high-side switch. The output voltage is controlled by a Pulse Width Modulation (PWM) signal generated by the internal control logic. When the output voltage reaches the predetermined voltage setpoint, the logic will turn off the MOSFET switch and the output voltage will be maintained at the predetermined voltage. This buck converter mode is highly efficient and reduces RDS(ON) power loss.

The ISL85009FRZ-T is also capable of operating in a low dropout (LDO) mode. In this mode, the power is transferred from the input to the output through a MOSFET switch and diode connected in series at the output. The PWM signal generated by the internal control logic is used to regulate the output voltage. When the output voltage reaches the predetermined voltage setpoint, the logic turns off the MOSFET switch and the diode connected to the output maintains the output voltage at the predetermined voltage. This LDO mode is preferred for applications which require multiple output voltage regulation.

The ISL85009FRZ-T also comes with a host of safety features such as Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), Over-Current Protection (OCP) and Short Circuit Protection (SCP). It is also equipped with Thermal Shutdown to protect the device from any thermal damage due to the high power dissipation. The SoftStart feature ensures smooth start-up and reduces inrush current and output voltage ringing, thus preventing the system from experiencing any over-shoots. The low quiescent current of 1.2mA makes the ISL85009FRZ-T an ideal choice for automotive applications that require low power systems.

In summary, the ISL85009FRZ-T is an ideal DC-DC converter for a wide variety of applications, thanks to its wide input and output voltage range, high efficiency and multiple protection features. Its high efficiency results in lower input currents and less temperature variation, allowing for higher power system performance in a smaller form factor. Its low quiescent current and various protection features make it an ideal choice for automotive applications, helping to meet the ever increasing needs of today\'s power-hungry systems.

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