TPS40009DGQG4

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TPS40009DGQG4 is an integrated synchronous current-mode buck controller designed for high-performance voltage regulation applications, specifically designed for cost-sensitive, space- and power-constrained low-voltage (< 1 V) system powering applications. It integrates an adaptive PWM controller with an N-channel MDMOS power stage and features built-in protection features and a low on-resistance MOS switch.

The device is available in the 16-pin exposed-paddle, 4x4 mm QFN package, and its wide input voltage range supports the battery and common adapter input voltages worldwide. The thermally-enhanced package provides maximum-power device performance while minimizing thermal resistance across the package that results in reliable device operation regardless of the application environment.

Application Field for TPS40009DGQG4

TPS40009DGQG4 is widely used in low-voltage (< 1 V) applications. These can include powering low-voltage ASICs, FPGAs, ICs, microprocessors, DSPs and other smart applications. It is also suitable for low efficiency, battery powered portable applications including media players, PDAs, cell phones, smartphones and other handheld electronics. In addition, TPS40009DGQG4 can be used in an array of other applications such as automotive systems, point-of-load (POL) converters and industrial applications.

Principle of Operation for TPS40009DGQG4

The TPS40009DGQG4 synchronous buck converter is a voltage regulator that takes an input voltage, regulates it down to a specified level and provides a regulated output voltage. The converter consists of an input inductor, an output capacitor, a PWM (pulse width modulation) controller and an N-channel MOSFET switch. The input inductor delivers energy to both the load and the output capacitor. The PWM controller then determines when and how much energy is delivered to the load. Finally, the MOSFET switch is used to control the energy flow either to the load or to the output capacitor.

The controller monitors an auxiliary winding located on the input inductor which carries the sensed DC voltage waveform. During normal operation, this waveform is compared to a reference waveform to generate the appropriate PWM signal. The PWM signal is then used to drive the N-channel MOSFET switch. The amount of time the switch is on is controlled by the PWM signal, and this determines how much energy is delivered to the load.

The TPS40009DGQG4 is intended for use with a synchronous buck converter and is designed to provide a very cost- effective solution for supplying low-voltage applications. The device provides excellent input line/load transient response and is capable of delivering up to 3A of output current with good line and load regulation.

The TPS40009DGQG4 is an extremely reliable device providing adjustable output voltage regulation, allowing for customized powering with clean, stable voltages delivered to any application, regardless of input and load changes.

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