New family of adaptable buck-boost converters delivers up to 2.5 A in a tiny footprint to shrink board space

11/08/2019

Texas Instruments (TI) introduced a family of four high-efficiency, low-quiescent-current (I_Q) buck-boost converters that feature tiny packaging with minimal external components for a small solution size. The integrated TPS63802, TPS63805, TPS63806 and TPS63810 DC/DC noninverting buck-boost converters offer wide input and output voltage ranges that scale to support multiple battery-driven applications, helping engineers simplify and accelerate their designs.

Each of the devices in the family automatically selects buck, buck-boost or boost mode according to the operating conditions. Their complete solution size of 19.5 mm² to 25 mm² – up to 25% smaller than similar devices – is a result of compact packaging, an advanced control topology requiring few external multilayer ceramic capacitors, and tiny 0.47-µH inductors. The devices offer a wide 1.3-V to 5.5-V input and 1.8-V to 5.2-V output voltage range, which helps engineers speed their designs and encourages reuse across multiple applications.

These DC/DC converters are the latest addition to TI’s industry-leading low-I_Q power-management portfolio, providing low 11- to 15-µA I_Q for excellent light-load efficiency while minimizing power losses and extending run times in battery-driven applications such as portable electronic point-of-sale terminals, grid infrastructure metering devices, wireless sensors and handheld electronic devices.

Key features and benefits

• The TPS63802 is a 2-A buck-boost converter with low 11-µA I_Q consumption suitable for pulsed-load applications such as industrial Internet of Things devices.
• The TPS63805 is a 2-A buck-boost converter with a 22-µF output capacitor and 0.47-µH inductor resulting in a small solution size of 19.5 mm² that meets the requirements of handheld industrial and personal electronics applications.
• The TPS63806 is a 2.5-A buck-boost converter with a focus on improved load-step regulation for applications with an aggressive load profile that require tight regulation, such as time-of-flight sensors in smartphones, cameras or augmented reality devices.
• The TPS63810 is a 2.5-A buck-boost converter with I²C interface for dynamic voltage scaling through either a two-wire interface or the VSEL pin, enabling the device to serve as a pre-regulator or voltage envelope tracker for systems found in smartphones, wireless hearing aids or headphones.

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