PTH08T231WAS

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DC DC Converters

DC DC converters are versatile power supply devices used to convert a DC input voltage to a DC output voltage. They come in a variety of applications from consumer electronics, automotive, aerospace, military, medical, and industrial applications. The PTH08T231WAS based DC DC converter is one of many products in the DC-DC converter family.

The PTH08T231WAS is a low-dropout (LDO) DC-DC converter with adjustable Vout up to 2.3V and maximum 2A current output. It features an advanced controlling circuit, wide temperature range operation (-40℃ to +85℃) with built-in temperature protection, and a variety of safety protections. With 3 biax latch shut down and detection circuits, it is designed to provide reliable and stable output voltage for a variety of applications.

Working Principle

The PTH08T231WAS is a three-terminal adjustable LDO regulator. Its working principle is to firstly boost input voltage, transform to get higher voltage, then to step-down the voltage through linear regulation to target voltage. It internally consists of a power MOSFET, slow start circuit, reference voltage, feedback loop and control circuitry. The typical block diagram of PTH08T231WAS is shown in the figure below:

The power MOSFET is the main switching element of the circuit. It is directly controlled by current through the gate via the control circuitry. When the current passing through the MOSFET gate exceeds the turn-on threshold voltage and the control voltage is higher than the reference voltage, the MOSFET will be turned on, resulting in Vout reaching the target voltage set by the resistor divider network.

The slow start circuit is also another important part of the operating circuit. It limits the inrush current during start up and prevents the sudden input current from burning the power MOSFET due to the large capacitance on the output side. It also prolongs the life of the MOSFET.

The feedback loop is used to adjust the output voltage by comparing the feedback voltage with the reference voltage. The feedback voltage is generated by the voltage divider R1 and R2. When the feedback voltage is higher than the reference voltage, the control circuit will output lower voltage to decrease the drain-source voltage of the MOSFET, thus adjusting the output voltage.

Moreover, the PTH08T231WAS also provides a wide range of monitoring functions, including under voltage protection, over voltage protection, over temperature protection, enable/shut down pin, power good pin, etc. These functions ensure the reliability and safe working of the circuit in various conditions.

Application Fields

The PTH08T231WAS is widely used in various applications such as electric vehicles, digital cameras, phones, battery powered systems, super capacitors, laptops, and other portable devices. It can provide stable and reliable output voltage for different applications while still ensuring its small size and low power consumption. It can also be used in applications where multiple voltages are needed, such as in standby power supplies.

The PTH08T231WAS is a cost-effective and reliable DC DC converter and is a widely used and popular product. With its adjustable output voltage and current output, wide temperature range, and built-in safety protections, it is an ideal choice for various applications that require high quality and performance.

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