TPS3820-33DBVR

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Power management integrated circuit (PMIC) is an integrated circuit series composed of multiple functional circuits and peripheral circuits, which are used to realize the power supply, the power management of other circuits in the system and the fault protection of the system. It is an important component of metal system, and at the same time, it plays a major role in reducing the power consumption of electronic products, improving the power transmission efficiency, simplifying the circuit design and reducing the cost. Supervisor is a commonly used PMIC, which is mainly used for system reset and power failure warning. The TPS3820-33DBVR application field and working principle is described in detail in the following part.

The TPS3820-33DBVR is a supervisor IC with low voltage detection, push pull reset OUTput (PPV), and adjustable reset threshold, operating from a single 2.5V to 5.5V supply. It provides integrated supervision of power supply and power system integrity with fixed pull-up voltage, adjustable reset threshold and delay, open-drain reset and push-pull reset output. This part has a very low quiescent current and ultra-low power consumption. Its main applications are embedded systems requiring low-voltage detection, low-voltage voltage, and low-power reset functions. It is also suitable for battery management systems that require low-power supply applications.

The TPS3820-33DBVR is available in a space saving SOT-23 package. It integrates a low-voltage detector that monitors the supply voltage, a voltage reference configured to the reset threshold voltage, and a delay circuit configured to the reset timeout. When the supply voltage is applied, the voltage is immediately compared to the reference voltage. If the voltage is above the reset threshold, the reset signal will be disabled. If the voltage falls below the reset threshold, the reset signal will be enabled after a pre-set delay. When the reset signal is enabled, the output is released to indicate a reset condition.

The reset threshold voltage of TPS3820-33DBVR can be adjusted over a range of 1V - 3.8V with a tolerance of ±5%. It has a low supply current of 150uA and a maximum reset timeout of 4.5s. It also has an internal pull-up voltage of 1.66V and a reset timeout down to 250ms. The part operates at temperatures between -40ºC and +125ºC. The reset signal remains valid for a minimum of 90µs. It is wide range of input voltage tolerant and can cater to supplies as low as 1V and as high as 5.5V.

In conclusion, the TPS3820-33DBVR is an excellent example of PMIC – Supervisors, providing low-voltage detection, low voltage voltage, low-power reset functions and other advantages. Its main applications are embedded systems requiring low-voltage detection, low-voltage voltage, and low-power reset functions. It is suitable for battery management systems requiring low-power supply applications and has a wide-range input voltage tolerance and operating temperature range. Therefore, it is an ideal product for many applications.

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