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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flp87745-q1″>View Datasheet
Texas Instruments LP87745-Q1 Automotive Three Buck Converters are engineered for power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The LP87745-Q1 includes three step-down DC/DC converters, a 5V boost converter, and a 1.8V or 3.3V LDO. The LDO is powered from the boost and designed for the xWR I/O supply, while an SPI serial interface enables signals to manage the device.
The TI LP87745-Q1 automotive three-buck converters supply a programmable switching frequency of 4.4MHz, 8.8MHz, or 17.6MHz. High switching frequency and low noise across a wide frequency range allow an LDO-free power solution with minimal or no passive filtering. These features improve thermals and transient settling for the MMIC RF rails. The LP87745-Q1 forces the switching clock into PWM mode for optimal RF performance and can also be synchronized to an external clock. The device supports remote voltage sensing to compensate for IR drop between the regulator output and the point-of-load (POL), improving the output voltage’s accuracy.
The LP87745-Q1 supports programmable start-up and shutdown delays and sequences synchronized to the ENABLE signal. The sequences can also include GPO signals to control external regulators, load switches, and processor reset. The default settings for the LP87745-Q1 are programmed into nonvolatile memory (NVM). The LP87745-Q1 controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.
