The Texas Instruments TPS70933DBVR is a highly efficient, low-dropout regulator (LDO) designed to provide a stable output voltage from a higher input voltage, even with very low input-to-output voltage differentials. It is part of the TPS709 family of LDOs that is specifically optimized for applications requiring low quiescent current, low dropout voltage, and high output accuracy. This device is widely used in battery-powered systems, portable electronics, and other power-sensitive applications.

The TPS70933DBVR is a 3.3 V output low-dropout (LDO) voltage regulator that is designed to handle input voltages ranging from 1.6 V to 6 V, making it ideal for use in systems powered by low-voltage sources, such as lithium-ion batteries, USB power, and 5 V power rails. The device provides an excellent solution for powering low-voltage digital circuits, analog devices, sensors, and other components that require a stable 3.3 V supply.

## Key Features

* Low Dropout Voltage: One of the key advantages of the TPS70933DBVR is its extremely low dropout voltage, typically around 40 mV at 100 μA load current and 160 mV at a 150 mA load current. This ensures that the regulator can maintain stable output voltages even when the input voltage is very close to the output voltage, providing greater flexibility for power management in low-voltage systems.

* Output Voltage: The TPS70933DBVR provides a fixed 3.3 V output, which is a standard voltage level for powering many logic circuits, sensors, and communication devices. The fixed output is highly accurate, with a voltage tolerance of ±2% at 25°C.

* Wide Input Voltage Range: The device can operate with input voltages from 1.6 V to 6 V, providing flexibility in different power systems. This wide input range allows the regulator to be used with low-voltage batteries, USB power sources, or other voltage sources, making it suitable for a variety of applications.

* Low Quiescent Current: The TPS70933DBVR has an ultra-low quiescent current of just 30 nA, which minimizes power consumption when the load current is very low. This makes the device particularly well-suited for battery-operated applications, where energy efficiency is critical for prolonging battery life.

* High Output Accuracy: The TPS70933DBVR is designed with tight output voltage accuracy of ±2% over the full temperature range, ensuring reliable and consistent performance. This makes the device suitable for precision analog and digital systems where output voltage accuracy is crucial.

* Low Dropout Performance: Even at high output currents, the device maintains low dropout voltage. This makes it ideal for applications where maintaining a stable voltage is important even when the battery voltage or input supply voltage is nearly equal to the required output voltage.

* Overcurrent and Overtemperature Protection: The TPS70933DBVR includes built-in protection features such as overcurrent protection (OCP) and thermal shutdown. These features protect both the device and the downstream circuits from damage in case of excessive current draw or overheating.

* Small Package: The TPS70933DBVR comes in a compact SOT-23-5 package, which is ideal for space-constrained applications. This small package makes the regulator suitable for portable devices, wearables, and other applications where board space is limited.

* Stable with Low ESR Capacitors: The device is designed to be stable with low equivalent series resistance (ESR) output capacitors. This ensures reliable operation and low output voltage ripple, even with smaller capacitors, which are often used in compact designs.

* Wide Temperature Range: The TPS70933DBVR operates over a wide temperature range from -40°C to +125°C, making it suitable for a wide variety of environments, including automotive, industrial, and consumer electronics.

## Electrical Characteristics

## Absolute Maximum Ratings

* Input Voltage (V\_in): The maximum input voltage is 6 V, which defines the upper limit of the input voltage that can be safely applied to the device. Exceeding this voltage could result in permanent damage to the regulator.
* Output Voltage (V\_out): The device provides a fixed 3.3 V output voltage. Exceeding the specified output voltage tolerance can lead to incorrect operation or damage to the powered circuitry.
* Output Current (I\_out): The TPS70933DBVR is capable of sourcing up to 150 mA of output current. This makes it suitable for powering small to medium loads, such as low-power logic circuits, sensors, and other analog or digital components.
* Thermal Shutdown: The device will shut down if the junction temperature exceeds 150°C, which is a critical feature to protect against overheating. This ensures the device does not sustain damage from excessive thermal conditions.
* Storage Temperature: The device can be stored in the temperature range of -65°C to +150°C, making it durable and suitable for harsh storage conditions.

## Typical Electrical Characteristics

* Output Voltage: The regulated output voltage is 3.3 V, with a typical tolerance of ±2% at 25°C. This ensures that the device maintains a consistent output voltage under typical operating conditions.
* Dropout Voltage: The typical dropout voltage is around 40 mV at 100 μA load current and 160 mV at 150 mA load current, ensuring that the regulator continues to provide stable output even when the input voltage is close to the output voltage.
* Quiescent Current (I\_q): The device has an extremely low quiescent current of 30 nA, which ensures minimal current draw when the device is not under load, making it ideal for low-power applications and battery-powered systems.
* Output Current: The TPS70933DBVR is capable of supplying a continuous 150 mA output current, which is suitable for powering small analog or digital circuits, microcontrollers, sensors, or wireless communication modules.
* Power Supply Ripple Rejection (PSRR): The regulator exhibits excellent power supply ripple rejection (PSRR), typically around 50 dB at 100 Hz. This helps ensure that the output voltage remains stable and free from high-frequency noise or ripple from the power supply.

## Key Protection Features

* Overcurrent Protection (OCP): The device includes integrated overcurrent protection to prevent excessive current from flowing through the regulator, protecting both the device and the load.
* Thermal Shutdown: If the junction temperature exceeds 150°C, the device will enter thermal shutdown mode to prevent overheating and damage.
* Reverse Current Protection: The device includes reverse current protection, ensuring that it does not draw current from the output when the input voltage is disconnected or lower than the output.

## Application Circuit

The TPS70933DBVR is ideal for a variety of applications, particularly those requiring efficient, low-dropout voltage regulation in space-constrained, battery-powered, or low-voltage systems. Some typical application circuits include:

1. Battery-Powered Systems: The TPS70933DBVR can be used in portable electronics such as smartphones, tablets, wearable devices, and handheld instruments to regulate voltage from batteries or low-voltage power sources.
2. Low-Voltage Logic Circuits: The 3.3 V output is suitable for powering low-voltage digital circuits, including microcontrollers, logic gates, and sensor interfaces.
3. Powering Analog Devices: The stable output voltage provided by the TPS70933DBVR can be used to power analog circuits, op-amps, signal processing circuits, and other low-power analog components.
4. Portable Communication Devices: The device can be used in wireless communication systems (e.g., Bluetooth, Wi-Fi, Zigbee) to power low-voltage radio circuits.
5. Energy-Efficient Systems: With its low quiescent current and low dropout voltage, the TPS70933DBVR is ideal for energy-efficient designs, including solar-powered devices, battery management systems, and energy harvesting applications.

## Thermal and Mechanical Characteristics

* Thermal Resistance (Junction-to-Ambient, R\_θJA): The thermal resistance is typically 180°C/W for the SOT-23-5 package, meaning the device will dissipate heat more effectively, with minimal rise in junction temperature for a given load current.
* Operating Temperature Range: The TPS70933DBVR operates within a temperature range of -40°C to +125°C, making it suitable for industrial, automotive, and consumer applications where temperature extremes are common.
* Storage Temperature Range: The device can be safely stored within the range of -65°C to +150°C, providing durability and reliability even under harsh conditions.

## Conclusion

The TPS70933DBVR is a high-performance, low-dropout voltage regulator (LDO) that is designed to provide a stable 3.3 V output with extremely low dropout voltage and low quiescent current. It is ideal for use in battery-powered devices, portable electronics, and other low-voltage systems where space, efficiency, and output accuracy are important. With its wide input voltage range, tight output voltage tolerance, and built-in protection features, the TPS70933DBVR provides a reliable and efficient solution for powering a variety of low-power analog and digital systems.