TPS61045DRBRG4

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The TPS61045DRBRG4 is a member of Texas Instruments\' compact, synchronous boost voltage regulator series. Designated as part of their DC/DC switching regulator portfolio, this integrated circuit was specially developed for power sensitive applications that require portability, miniature form factors and high efficiency to be met. Its tiny chassis allows it to occupy minimal board space and its broad input voltage range make it perfect for a range of solutions. Through several safety and protection mechanisms incorporated into this device, the TPS61045DRBRG4 can be used confidently in a range of settings.

A primary feature of this integrated circuit is its ability to boost an input voltage of as low as 1.6V up to a maximum output of 5.5V, with a minimum of 3% accuracy. It has a maximum output current capability of 1.5A. This is done by a two-stage dynamic output voltage control structure which firstly uses the built-in inductance to transform the input voltage before converting it to an even higher output voltage through a 1-MHz buck-boost topology.

The TPS61045DRBRG4 has several safety and protection features implemented, such as two fold over current protection techniques that monitor the input and output stages separately, as well as overtemperature and undervoltage protection. The voltage ration between the output and the input, the duty cycle and the switch current is accurately regulated and monitored, with the sense pin on the output providing accurate control of the output current.

The total device power consumption is extremely low, typically as low as 0.75 μA during shutdown and operating at a supply current from 2.5 mA to 3.5 mA. As this device does not require any external loop compensation, it does not have a large current gain pole, allowing for easy adjustment over load conditions. On-Die thermal and current shutdown further protects the device and its load under severe fault conditions.

The TPS61045DRBRG4 has wide applicability in products such as portable media players, smartphones, personal digital assistant, digital cameras, wireless sensor modules, wireless data communication and industrial control systems. Its low profile furthermore allows it to be used in designs in which space is limited, such as in PC-MCIA cards and credit-card sized system applications. Typical operating temperature range of this device is -40°C to +85°C.

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