TPS61001DGS

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TPS61001DGS is a digitally programmable, high-efficiency, DC/DC converter with a wide range of adjustability and flexibility. It offers a dynamic voltage scaling and high efficiency over the full range of operation with dual down conversion modes. The device integrates all the necessary logic, power extraction and control components, simplifying the overall design.

The TPS61001DGS is designed as a successive approximation (time-domain) regulator, with the switching frequency and other parameters easily adjustable via an external resistor. The core logic implements a buck-boost-type regulator with a PFM control loop.

As a DC/DC switching regulator, TPS61001DGS has a wide range of application fields, including USB-powered mobile phone, portable computer, MP3 player, digital camera, tablet PC, game machine and etc. The device offers high efficiency with low output ripple and emissions by using a combination of PFM (pulse frequency modulation) and PWM (pulse width modulation) control techniques. It is also able to output a stable voltage even with a varying input voltage.

The working principle of TPS61001DGS can be clearly divided into two parts: buck-boost operation and PFM control loop. In the buck-boost operation, a P-FET (power FET) is used to switch the output voltage. A buck-boost controller is used to make sure that the output voltage is always within the specified range. It uses the voltage reference, error amplifier and a soft-start circuitry to adjust the duty cycle according to the input voltage range. The duty cycle is then used to control the power FET to switch the output voltage.

The second part is the PFM control loop. The PFM control loop is used to reduce the overall switching frequency and ensure continuous voltage regulation. It uses feedback loops to monitor the output voltage and adjust the switching frequency to maintain the output voltage within the preset regulation range. The duty cycle of the P-FET is then adjusted accordingly. It also has an adjustable voltage limit which will turn OFF the switch when the output voltage reaches an configured limit.

The TPS61001DGS is an excellent DC/DC switching regulator with the flexibility of adjustable voltage, wide input voltage range, low output ripple, high efficiency, and low noise. It is suitable for many applications, including USB-powered mobile phone, laptop, digital camera, and etc. Its PFM control loop and buck-boost operation allows for smooth voltage regulation even with varying input voltage, making it an ideal choice for portable electronic devices.

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