TPS61080DRCTG4

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The TPS61080DRCTG4 is a DC-DC switching regulator with an integrated power switch. It is suitable for applications in low-power designs, such as low-power displays, portable media players and digital video players. The device is available in the TO-220 package with a wide input voltage range of 2.4 to 6.5V. It can operate from input voltage sources ranging from a single 1.5V battery cell to a 5.5V USB power rail. It is designed to efficiently deliver up to 1.1A of continuous output current over a wide temperature range of -40°C to +85°C.

Device Feature

The TPS61080DRCTG4 has a high integration level and low component count. It features a fixed 500kHz frequency, current-mode control and is capable of operating over a wide input voltages range. It includes the output voltage detection and Brown-out protection functions. Internal circuit protections include overcurrent protection and overtemperature protection. The device also features an external P-MOSFET that allows for a very low stand-by current and advanced features, such as low-ripple start-up, adaptive slope compensation and adjustable soft-start.

Application Field

The TPS61080DRCTG4 is ideally suited for low-power voltage regulation applications in portable medical, fitness and consumer devices, such as digital cameras, mobile phones and music players. It is specificall designed for use in portable devices where board size is a critical consideration. Thanks to its wide operating voltage range the device can be powered from a single 1.5V battery cell or 5.5V USB power rail.

Working Principle

The TPS61080DRCTG4 works by converting an input voltage to a regulated output voltage. It operates by turning ON/OFF a power switch at a controlled ON/OFF ratio. The regulation loop requires two feedback input to adjust the ON/OFF ratio. The first feedback is passed through a voltage divider and it provides information to the internal comparator which determine when to turn the switch ON. The second feedback is passed through a gain block and it determines when to turn the switch OFF. When the input voltage is higher then the output voltage, the comparator will control the ON/OFF ratio so that the input current is equal to the output current. When the input voltage is lower then the output voltage, the voltage feedback loop will adjust the ON/OFF ratio to maintain a regulated output voltage regardless of the input voltage.

Conclusion

The TPS61080DRCTG4 is an efficient DC-DC switching regulator with integrated power switch. It features a wide input voltage range of 2.4 to 6.5V and is capable of delivering up to 1.1A of continuous output current over a wide temperature range of -40°C to +85°C. The device has excellent efficiency and is ideal for a wide array of low-power applications, such as portable medical, fitness and consumer devices. It works by converting an input voltage to a regulated output voltage by turning ON/OFF the power switch at a controlled ON/OFF ratio.

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