TPS62590DRVT

TPS62590DRVT is a synchronous step-down converter integrated circuit created by Texas Instruments. It couples a 1.2 MHz fixed frequency VOLT Southwest sloop converter and 3.3 V fixed output LDO linear voltage regulator into a single chip. This converter can provide up to a 1.5 A load current while operating at up to 5.5 V input voltage. In addition, it features low quiescent current and low-noise operation. The TPS62590DRVT provides small and low-cost solutions for applications where the power supply must be efficient in terms of power consumption, and have a wide operating temperature range.

Application Field for the Voltage Regulator

The TPS62590DRVT voltage regulator is useful for applications requiring buffer solutions with selectable output voltages due to its high switching frequency. Examples of usage for the TPS62590DRVT include:

• Noise-sensitive and high-precision circuits
• Low-noise regulated power supplies
• Point-of-load supplies used in conjunction with ultra-stable switching regulators
• Integrated systems used for home consumer products, such as audio playback systems, gaming consoles, and televisions.

Working Principle of the Voltage Regulator

When operating with the TPS62590DRVT, the converter is powered with a primary source, typically between 4.5 and 5.5 V. The regulated output voltage depends on the voltage divider set at the output of the converter. The output voltage can be adjusted to as low as 0.8 V. A separate 3.3 V adjustable output LDO linear regulator (LDO) is provided to supply a low voltage rail, while an external shunt regulator controls the load transients and reduces the output voltage ripple. The LDO output is then connected to an output buffer stage to create a buck-boost converter.

The TPS62590DRVT integrates an internal oscillator that controls the switching frequency of the converter. The user can choose one of multiple switching frequencies ranging from 200 kHz to 1.2 MHz. Additionally, the size of the converter’s power stage and the number of switching cycles determine the output ripple amplitude. Due to low EMI emission and the ability to provide low output voltage ripple, the TPS62590DRVT is suitable for applications requiring high-precision power regulation.

Conclusion

The TPS62590DRVT is an efficient and innovative step-down converter from Texas Instruments. It is integrated with a 1.2 MHz fixed frequency VOLT Southwest sloop converter and 3.3 V fixed output LDO linear voltage regulator, and can provide up to 1.5 A load current while operating at up to 5.5 V. It is suitable for noise-sensitive and high-precision circuit applications, such as powered audio playback systems, gaming consoles, and televisions. The output voltage of this converter can be adjusted to as low as 0.8 V. The integrated oscillator controls the switching frequency of the converter, which can be set to any frequency between 200 kHz and 1.2 MHz.