TPS76133DBVRG4

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The TPS76133DBVRG4 is a low-dropout (LDO) linear voltage regulator and it is a member of Texas Instruments’ Wide Adjustable LDO family. This family of LDOs covers a wide input voltage range and features a very low quiescent current along with low ground current mode, enabling extremely low power applications. The TPS76133DBVRG4 supports a wide input voltage range of 1.2V to 5.5V and an output voltage adjustable range of 0.9V to 5.0V in 200mV increments. This voltage regulator takes very little quiescent current, as low as 180µA while maintaining a low ground current, thanks to its quiescent current regulation feature. The load current supported is 500mA, with 1mA spread spectrum increase. The device is equipped with a logic-controlled power-on reset circuit which turns off the regulator output upon power-on and powers up the output after a pre-defined delay.

The operating temperature range of the TPS76133DBVRG4 ranges from –40°C to 125°C and it comes in a small SOT-23 surface mount package. The device also supports an adjustable slew rate during voltage transitions, thus allowing the user to set it to a level suitable for the connected load and minimize power dissipation.

At the heart of this voltage regulator is a low noise, low drop-out voltage regulator. A PMOS pass device and NMOS pass device are connected together to form an inverting amplifier. These transistors can switch between “on” and “off” states quickly and thus regulate the voltage at the output. The voltage regulator also uses a voltage divider stage, which divides the input voltage and produces a reference voltage at its output. This reference voltage is compared with the reference voltage at the output of the adjusting stage and the difference is amplified. This amplified signal is then applied to the pass transistors of the voltage regulator, which in turn adjusts the output voltage.

The main applications for the TPS76133DBVRG4 are found in devices such as mobile phones, handheld Computers, GPS devices and digital cameras, where low voltage and low power requirements are crucial. This voltage regulator is also suitable for very low-margin supplies and can be used in scenarios where the input voltage is slightly greater than the required output voltage.

Overall, the TPS76133DBVRG4 from Texas Instruments is an excellent low drop-out (LDO) linear voltage regulator which offers a wide input voltage range and a low quiescent current. It is an ideal choice for battery-based systems where power conservation is essential. Its adjustable voltage output and its adjustable slew rate capability make it a highly reliable solution for modern electronic systems.

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