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PMIC - Voltage Regulators - Linear

TLE42994GXUMA1 application field and working principle

The TLE42994GXUMA1,named TI TLE42994G Precision Low Power High PSRR 2.8MHz DC-DC Converter,is a low power buck converter from the SMR family of devices released by Texas Instruments. The device is suitable for a wide range of automotive and other portable applications like handsets. It provides a very high load transient accuracy, light load efficiency and no load quiescent current, while minimizing Input Output (I/O) capacitance footprints.

The TLE42994GXUMA1 integrates a complete switching regulator in a very small package providing the user with the advantage of improved current, voltage and time accuracy. The internal voltage regulation network is a single-phase buck converter with a constant frequency current-mode control; this allows for accurate regulation at light and heavy load currents, as well as low output voltage ripple and noise.

The TLE42994GXUMA1 has an input voltage range of 2.6V to 5.5V, which makes it suitable for a wide range of automotive and other portable applications. Its output voltage can be set externally between 0.6V and 3.3V, while the nominal switching frequency is 2.8MHz, allowing for improved current and voltage accuracy. The device also integrates a pulse-frequency modulation (PFM) control to preserve power, at light-load conditions.

The TLE42994GXUMA1 can operate at a 1.5A continuous output current, with an efficiency of 90% over a wide input voltage range, at room temperature. Its output voltage is adjustable via an external resistor divider or via the enable pin (EN). Additionally, its output voltage is also adjustable for operation over the full temperature range, via a single resistor.

The device has several distinct features to simplify design, such as an over-current protection (OCP) circuit, over-temperature protection (OTP), and an improved UVLO feature to protect the device against adverse conditions. The device also integrates several other features to simplify design, such as a soft-start, a low quiescent current, and a direct connection to the battery.

The TLE42994GXUMA1 has several application fields, where it has proven to be highly useful. It is suitable for Portable Device like mobile phones, laptops, tablet PCs and other consumer electronics. It’s also used in automotive applications such as GPS, HVAC, Audio Systems and Automotive Infotainment systems.

Conclusion

The TLE42994GXUMA1 from TI provides a means for efficient power conversion, as required in automotive and other portable applications. It features a low quiescent current, high efficiency, over-current protection, over-temperature protection and a direct connection to the battery. It is suitable for a wide range of mobile devices, consumer electronics and automotive applications, with its adjustable output voltage.

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