TPS62003DGSR Integrated Circuits (ICs)

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TPS62003DGSR Application Field and Working Principle

The TPS62003DGSR is a monolithic step-down dc–dc converter from Texas Instruments. It is a part of the company’s Family of PMICs (Power Management Integrated Circuits). It is designed to regulate the output voltage of a Buck step-down switching regulator for portable applications. As a DC/DC switching regulator, the TPS62003DGSR is an ideal solution for applications such as wireless headsets, portable gaming consoles, health and medical devices, and digital cameras among many others.

The device offers a very high efficiency, up to 95%, with a low quiescent current of 30uA and an adjustable output voltage of 2.5V to 6.5V. It is a space saving, industry standard 8-pin package that offers a cost effective solution, without sacrificing performance or safety. It also includes a fixed frequency current mode architecture and is controlled by a 0.5V input voltage reference.

The working principle of the TPS62003DGSR involves two main components:

• An internal current mode Buck PWM (Pulse Width Modulation) controller
• An external power MOSFET switches

The PWM controller operates in two modes: Force-PWM Mode and Slow-Mode. In Force-PWM Mode, the PWM controller adjusts the duty cycle of the output voltage to maintain a constant output voltage, even when the load changes. In Slow-Mode, the duty cycle is adjusted to reduce unwanted buzzing noise at light load conditions.

The external power MOSFET switches draw current through the input source to the output source when the PWM controller is in Force-PWM Mode. The external power MOSFET switches also allow for current to be drawn from the input source to the output when the device is in Slow-Mode.

Overall, the TPS62003DGSR DC/DC switching regulator is an efficient, space saving, cost effective solution for applications that require high efficiency buck voltage regulation. By employing the device in these applications, designers can be assured of reliable, low noise performance and a compact design.

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