TPS60313DGSR

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The TPS60313DGSR is a Pulse Width Modulation DC-DC converter integrated circuit. The device is a member of the DC-DC Switching Regulators family of Power Management Integrated Circuits (PMICs). Usually, it is applicable to industrial, communication, and computer systems that require an input voltage source supplied by four-cell or two-cell alkaline battery packs.

The TPS60313DGSR provides a complete power solution for input battery voltages of 3 or 4.5V, and a 3.3V output voltage with up to 500mA of load current. The device supports a battery life of more than 20 hours even under heavy load conditions. This is achieved with a low quiescent current of only 55uA and due to its high efficiency, it dissipates very low heat during operation.

The device comes in an ultra-small carrier suitable for use on densely populated PCBs. It includes a reference, an oscillator, a fixed off-time current-mode control, as well as two high-frequency MOSFETs. In addition, protection features such as short circuit current limitation (500mA), over-temperature protection, over-voltage protection, under-voltage protection, output current fold back, etc. are integrated on the chip.

The TPS60313DGSR is primarily intended for cost-effective total power solution for industrial, communications, and computer systems in applications such as battery- operated portable electronic devices, notebook and laptop computers, or for powering embedded systems. It is also used for applications that require high efficiency, low dropout voltage and low quiescent current.

The working principle of the TPS60313DGSR is based on Pulse Width Modulation (PWM) or Current Mode Control. The integrated circuit regulates the output voltage by controlling the average power applied to the load over time. It does this by changing the duty cycle of the pulse width modulation waveform, thus controlling the average power output. It is important to note that the frequency of the pulses is generally fixed and the pulses are the same regardless of the load current.

The internal power MOSFETs of the TPS60313DGSR switch at a frequency of 400kHz, with a peak current up to 500mA and a minimum on-time of 60ns. A low pass filter is used to smooth the current waveform to reduce the ripple on the output. The feedback divider provides the feedback to the control loop of the device, allowing it to adjust the output voltage.

In conclusion, the TPS60313DGSR is a low cost, easy to use DC-DC switching regulator integrated circuit from Texas Instruments. It is designed for efficient operation and provides a low quiescent current and high output efficiency. As a member of the DC-DC Switching Regulators family of Power Management Integrated Circuits (PMICs), it is suitable for a variety of industrial, communications, battery-powered applications and embedded systems, which require a 3.3V output with up to 500mA of load current.

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