ISL80019AFRZ-T7A

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The ISL80019AFRZ-T7A is an ultra wide input range (3.0V to 100V), non-synchronous, Stepdown Ultra Low IQ, constant-frequency (fixed operating frequency of 800kHz) DC-DC switching voltage regulator. It is ideal for many industrial, automotive, and consumer safety-critical applications as it can operate with input/output voltages separated with up to 500V.

applications

The ISL80019A serves as a general-purpose power supply for many different kinds of applications. It is used in a wide variety of power systems, ranging from basic dc-dc converters for powering a system from a single battery source to complex VRM/VRD voltage regulator systems for single and multiple supplies. This regulator is often used in end markets such as capacity critical automotive and industrial applications such automotive infotainment systems, industrial motor drives, and smart meters. This device is particularly suitable for cost-sensitive applications as it is easy to use and comes in a small package size with minimal external components.

working principle

ISL80019AFRZ-T7A switching voltage regulator works on the principle of pulse width modulation (PWM) control. The input voltage is regulated to a predetermined output voltage by using an internal error amplifier and an internal power transistor (the power switch). The power switch is then driven by a Constant Frequency PWM signal, which causes the output voltage to be tightly regulated. When the power switch is on, the input voltage is converted to the desired output voltage by the internal power regulation circuitry; when the switch is off, the power transistor switch is turned off, thus preventing the input voltage from being applied to the load. This momentarily disconnects the load from the input voltage source, so that the output voltage is represented by a regulated PWM signal. By varying the duty cycle of the PWM signal, the output voltage can be varied as desired.

Advantages

One of the key advantages of the ISL80019AFRZ-T7A is its maximum input voltage range of up to 100V. This makes the regulator suitable for a range of automotive and industrial applications with wide input voltage ranges. This regulator is also very efficient, thanks to its high switching frequency and ultra-low quiescent current, which allow for good efficiency even at light loads. The device also offers excellent dynamic response to transient load, enabling lower component count, component size and noise, improving system performance. Furthermore, this regulator features multiple protective features, such as over-current protection, over-temperature protection, and a wide range of soft start, shutting down, and other adjustable settings. Finally, it is available in a variety of package types, making it a great choice for a wide range of applications.

Conclusion

The ISL80019AFRZ-T7A is a reliable, high-performance switching voltage regulator. It offers an ultra wide input voltage range and an ultra low quiescent current, making it well suited for a range of automotive and industrial applications. Additionally, the device has excellent dynamic response to transient loads and multiple protective features, while its multiple package types make it suitable for a wide range of applications. As such, it is a great choice for cost-sensitive applications that require high performance and reliability.

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