ISL80121IR50Z

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The ISL80121IR50Z is a low noise linear regulator designed and manufactured by Infineon Technologies. It is a member of Infineon\'s family of low dropout linear voltage regulators. The ISL80121IR50Z is a fixed voltage, low-dropout linear voltage regulator featuring low noise, low quiescent current and very fast transient response. It is suitable for applications requiring low noise, low quiescent current and stability.

The ISL80121IR50Z is designed to provide a regulated low voltage output voltage with high efficiencies and fast transient response. It has a very low operating temperature range of -40°C to +105°C. In order to obtain the desired output voltage, the chip requires a minimum input voltage of 1.5V and a maximum of 6.5V. The maximum output current for this regulator is 300mA. It has an on-chip adjustable current limit feature as well as an enable control input for shutdown control.

The ISL80121IR50Z regulator produces very low levels of output noise, which is made possible by the application of proprietary internal noise reduction techniques. The ISL80121IR50Z includes several features that can help reduce noise and ripple in the output voltage. These include an on-chip low-noise error amplifier, a power MOSFET-based active filter, current limit protection and soft-start circuitry to reduce inrush currents.

The ISL80121IR50Z is typically used in applications such as: voltage regulators for microprocessors, cell phones and computers; voltage regulation for embedded systems and DSL systems; and power supplies for custom test equipment and instrumentation.

The ISL80121IR50Z employs an internal p-channel MOSFET pass transistor, an on-chip voltage reference, current limit circuitry and several other features as part of its design. The chip includes an error amplifier, a turn-on circuit, a bias voltage regulator and a soft-start circuit. The error amplifier provides the necessary voltage regulation control. When the output voltage is lower than the specified output voltage, the error amplifier turns on the pass transistor increasing the current through the output and raising the output voltage. When the output voltage is greater than the specified output voltage, the error amplifier reduces the current through the output and lowering the output voltage.

The current limit circuitry of the ISL80121IR50Z monitors and protects the output by limiting the output current to a predetermined level. When the output current reaches this maximum limit, the current down-regulation occurs, limiting the output current to the set point and protecting the device against damage due to overcurrent. The ISL80121IR50Z also has a internal soft-start circuitry to reduce inrush current during power up, which prevents damage due to excessive inrush current.

The ISL80121IR50Z is a low noise linear voltage regulator that is suitable for applications requiring low noise and low quiescent current. It is designed to provide a regulated low voltage output voltage with high efficiencies and fast transient response. The chip includes an error amplifier, a turn-on circuit, a bias voltage regulator, a power MOSFET-based active filter and a soft-start circuit. The ISL80121IR50Z produces very low levels of output noise and is typically used in voltage regulation for microprocessors, cell phones and computers, voltage regulation for embedded systems, power supplies for custom test equipment and instrumentation and DSL systems.

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