ISL21009DFB841Z

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ISL21009DFB841Z is a low-dropout voltage reference with I2C serial interface developed by Renesas Electronics Corporation. It has a very small form factor of only 9UPs, which makes it one of the most compact voltage references available. The device is capable of providing adjustable output voltages from 0.6V to 3.3V, with 0.01V increments. It can also be used to measure temperatures up to +85C.

ISL21009DFB841Z is typically used in portable applications, such as medical devices, telemetry, automotive and industrial systems. The device is also used in power management systems where accurate and stable reference voltages are required. It is ideal for some of these systems due to its wide operating voltage range, low power consumption and small form factor.

The ISL21009DFB841Z is designed to regulate supply voltages with low losses and low jitter. It integrates an ultra-low noise, low dropout voltage reference with an I2C slave interface. The device supports a wide supply voltage range of 4.2V to 14V and provides adjustable output voltages of 0.6V to 3.3V. The device also provides excellent load regulation with a maximum output current of 1mA.

The power supply sequence of the device is very simple. First, the output voltage is adjusted by sending a valid I2C command. Then, the device increases its internal bias current as the supply voltage rises. Finally, the device pulls up the output voltage in order to maintain its accuracy. The maximum output voltage is clamped at 3.3V, even when the internal bias current exceeds the maximum rated current.

The outputs of the ISL21009DFB841Z are fully protected against overvoltage and reverse current flows. An overvoltage protection feature prevents the output voltage from exceeding 3.3V, even if the supply voltage is higher than the specified maximum. The output voltage is also automatically reset to its preset level if it exceeds the limit. The outputs also include short circuit and reverse current protection to ensure optimal performance at all times.

The ISL21009DFB841Z provides a very accurate and stable reference voltage for applications requiring precise voltage control. It is suitable for a wide range of applications due to its adjustable output voltage range, low dropout voltage, overvoltage protection, reverse current protection and low power consumption. This makes it an ideal device for supplying reference voltages in low power, portable applications where accuracy and stability are required.

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