TPS54332DDA

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The TPS54332DDA is a 2.5-A ultra-wide input voltage come-down DC-DC converter intended for portable products. The devicesupports a 4.5-V to 26-V wide input voltage range, making it ideal for battery-powered systems or systems powered by unregulated power sources. Its switching frequency is adjustable up to 1 MHz, allowing the user to realize high system efficiency while maintaining very small magnetic components. It has a low dropout voltage of just 65 mV in a 2.5-A load current, enabling it to provide power to the core of the system. The TPS54332DDA features programmable current limit and has a power good output for system-level operations. It operates from an input voltage of 4.5 to 26 V and can be used in a wide range of applications from consumer, to portable and automotive applications.

Working Principle: The TPS54332DDA utilizes a single-stage buck topology, with an internal switch, a Schottky diode, an inductor, two capacitors, and a temperature-compensated current-sense amplifier for the current limit function. When power is applied to the device, the power switch is configured to conduct, supplying current to the output. Once the output voltage reaches its programmed level, the power switch is switched off and a reverse current through the Schottky diode is conducted to the output, which prevents output voltage droop and eventually charges the output capacitors to the desired level. The output is then ready to accept further load current.

The TPS54332DDA provides supply voltage to many applications due to its very wide input voltage range. This makes it ideal for consumer electronics, automotive and portable applications. The device incorporates current-limit circuitry, preventing damage to the power device circuitry due to excessive current draw. The low dropout voltage (65 mV) also allows for very low noise output at light loads. With a programmable current-limit feature, the TPS54332DDA can be used in a number of applications, including USB Type-C applications, where an external current-sense resistor is used to sense current and report it to a USB-C controller for more accurate current measurement.

In a nutshell, the TPS54332DDA is a versatile, low-noise DC-DC converter intended for use in applications with wide input voltage ranges, low dropout voltage and adjustable frequency capability. Its wide input voltage range, adjustable frequency, and low dropout voltage makes it an ideal fit for consumer and automotive applications and portable applications. Its programmable current limit prevents damage to circuits due to excessive current draw and also allows for accurate current measurements.

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