TPS62043DRCR

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TPS62043DRCR application field and working principle

TPS62043DRCR is a low dropout (LDO) linear regulator with constant frequency DC-DC switching regulator from Texas Instruments. With its high efficiency and low power consumption, it can be used in a wide range of applications from miniaturized portable electronics requiring a low input voltage to medium power applications such as wireless local area networks (WLAN) and other low voltage powered circuit designs.

The TPS62043DRCR is a diminutive, high-efficiency, DC-DC switching regulator that can be used to provide a step-down voltage from a 4.5 V to 5.5 V input voltage. It features low quiescent current of 20 uA and is a good replacement for linear regulators in portable designs that require a low dropout voltage and current error amplification. The device supports a wide operating range from 0.5 V to 5 V and is capable of supplying up to 800 mA output current for portable and connectivity devices.

The DC-DC switching regulator topology employed in the TPS62043DRCR operates on a quasi-constant frequency. This eliminates the need for an output capacitor in order to make the loop stable, reducing size and cost. The switching frequency of the device is internally set to 600 kHz and can be adjusted using an external resistor. Its ultra-low external component count simplifies circuit layout and board area.

The device also features a programmable soft-start to limit in-rush current and to help protect against outputs voltage undershoot. Thermal foldback reduces the peak current when the die becomes too hot, preventing the device from entering thermal shutdown. The device also features integrated external MOSFETs that help protect the load regulated by the device when the output voltage is over-discharged or the load is shorted.

In addition to its low quiescent current, high efficiency and low operating voltage, the TPS62043DRCR is also pin-to-pin compatible with other, similar devices from Texas Instruments, such as the TPS62043DRCT. This allows circuit designers to easily substitute one part for the other when needed, without having to redesign the board.

The TPS62043DRCR is offered in a space-saving, 4-pin SOT-23 package and is fully protected against over-voltage, over-temperature, and output shorts. It is designed for operation in commercial temperature ranges from 0°C to 85°C and is ideal for use in battery-powered and smaller form factor applications.

In summary, the TPS62043DRCR is a highly efficient, low quiescent current DC-DC switching regulator with an ultra-low external component count, programmable soft start, and integrated external MOSFETs to protect the output, making it an ideal choice for a wide range of portable and low voltage powered circuit designs.

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