TPS3125L30DBVRG4

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The TPS3125L30DBVRG4 is a supervisor IC (integrated circuit) often used in power management applications. It is part of the Texas Instruments Supervisory Product family, which is one of the widely used low-cost power management ICs on the market. The TPS3125L30DBVRG4 is a dual-channel device with two independent voltage monitors. It is available in a SO-14 or VQFN-14 packages and is capable of monitoring multiple supply voltages in a low-power consumption and small form factor.

The TPS3125L30DBVRG4 is most useful for monitoring multiple regulated power rails in portable electronic applications, such as a notebook or mobile phone. It monitors the input and output power rails for over-voltage, under-voltage, and over-temperature conditions. In addition, the TPS3125L30DBVRG4 has an optional integrated watchdog timer, which is useful for program reset applications.

This IC offers two channels capable of operating independently of each other, with both channels providing fast foldback response, precision monitoring accuracy, overtemperature monitoring, as well as accurate and adjustable over-/under-voltage threshold settings. The TPS3125L30DBVRG4 has very low quiescent current of 20 μA maximum with one power supply on, and the total current per channel is 3.5 mA maximum.

Working principle

The TPS3125L30DBVRG4 is a dual-channel supervisor IC. The two channels are capable of monitoring different power rails independently of each other, for both over-voltage and under-voltage conditions. When either of the monitored power rails exceeds the over-voltage or under-voltage thresholds, the supervisor outputs a single low-signal response on a specific output pin. The supervisor can be programmed to provide different foldback de-assertion responses, meaning that the IC can respond in a variety of ways depending on the input voltage condition. The IC is also capable of monitoring for overtemperature conditions, with independent control of the over-temperature thresholds for each channel.

For over-voltage and under-voltage operations, the TPS3125L30DBVRG4 has internal 0.7V programming options and an adjustable 0.7V to 5V output range. The device also has a very fast propagation delay of only 1.45μs max. For optional watchdog timer applications, the TPS3125L30DBVRG4 has an adjustable watchdog timer from 10ms up to 4.3 seconds. In addition, the TPS3125L30DBVRG4 supports multiple operating temperature ranges.

The TPS3125L30DBVRG4 can be used in a variety of portable electronic applications. It is suitable for monitoring the input and output power rails of battery operated devices, as well as trackpad, LCD panel, and GPU voltage levels of notebook computers. In addition, the device can be used to protect against voltage spikes when switching between different power sources. The IC is also suitable for a variety of DC-DC converter supply application, such as PoE (Power over Ethernet), Quick Charge, and USB 3.0 applications.

Conclusion

The TPS3125L30DBVRG4 is a dual-channel supervisor IC suitable for monitoring multiple regulated power rails for over-voltage, under-voltage, and overtemperature conditions. The device has very low quiescent current of 20 μA maximum, fast propagation delay of 1.45μs max, and adjustable over-/under-voltage threshold settings. The TPS3125L30DBVRG4 is suitable for a variety of portable electronic applications, including tracking the input and output power rails of battery operated devices, PoE, Quick Charge, and USB 3.0 applications.

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