TPS3809I50QDBVRQ1

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PMIC supervisors are integrated circuit devices used to keep track of and control the power supply in modern electronics. TPS3809I50QDBVRQ1 is a low-dropout (LDO) voltage supervisory from the Texas Instruments Switching Voltage Supervisory Series. This supervisor device has several specific applications and a distinct working principle.

Features of TPS3809I50QDBVRQ1

TPS3809I50QDBVRQ1 combines precision monitoring and reset, adjustable delay, and push button reset features into a single, integrated device. It features a rail-to-rail voltage supervisor, with adjustment of the reset voltage, delay, and manual reset. The adjustable reset voltage ranges from 0.8V - 5.5V, and the reset delay is adjustable from 0.2 - 20 ms. It comes in the SC70-6 package, and is rated at a max input voltage of 16V.

TPS3809I50QDBVRQ1 has a wide range of applications. It is suitable for designs that require power reset, glitch or voltage brownout protection, supervision for power backup, and reliable circuit start-up systems. It is also suitable for portable devices powered by battery packs, power management interrupt and reset, and manual reset devices.

Working principle and features

The main principle of operation of the TPS3809I50QDBVRQ1 supervisor is to keep track and control of the power supply. It monitors input power, and when the voltage drops below a preset value, it automatically sets the output reset pin logic low, which forces the circuit to reset itself. This is useful for controlling an unreliable power supply, or when a power unit needs to reset.

The device has several features:

• Precision monitoring and reset
• Adjustable reset voltage from 0.8V to 5.5V
• Adjustable reset delay from 0.2 to 20 ms
• Push button reset feature
• Wide operating temperature range of -40°C to +125°C

The reset function of the TPS3809I50QDBVRQ1 ensures that power supply is running safely, and no unwanted events take place due to voltage drop or glitch. Its adjustable reset voltage and delay allow system designers to adjust the reset intervals to its exact requirement. The push button reset feature is an additional feature that can be used to safely reset a system manually.

Applications

The TPS3809I50QDBVRQ1 supervisor is ideal for applications that require precise power reset, voltage brownout protection, power management interrupt and reset, manual reset devices and reliable circuit start-up systems. Some of the most common applications include protection from power-on glitch or brownouts, in which the reset pin is pulled logic low and releases once the voltage goes back to its normal operating level. This makes the device ideal for power backup circuits, or for keeping unwanted events from occurring during power up or shutdown.

Other applications include portable electronic devices that require battery packs, or systems with LCD displays. In these applications, the TPS3809I50QDBVRQ1 can be used to monitor the power supply and ensure the system stays on while the battery drains, or to ensure the LCD display always stays on while the system is powered up.

Conclusion

In conclusion, TPS3809I50QDBVRQ1 is a versatile and reliable supervisor device, which combines reset, adjustable voltage and adjustable reset delay features. It is suitable for a wide range of applications, from portable devices, to power management and backup circuits. The device ensures that the power supply is always maintained and no unwanted events take place due to voltage glitches or drops.

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