The LP87745-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5-V boost converter and a 1.8 V or 3.3 V LDO. The LDO is powered from the boost and intended for xWR I/O supply. An SPI serial interface and enable signals control the device.
The step-down DC/DC converters support programmable switching frequency of 4.4 MHz, 8.8 MHz, or 17.6 MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. This improves thermals and transient settling for the MMIC RF rails. The device 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 IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage.
The LP87745-Q1 device supports programmable start-up and shutdown delays and sequences which are 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 device are programmed into nonvolatile memory (NVM). The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LP87745-Q1 Three Buck Converters and 5-V Boost for AWR and IWR Radar Sensors datasheet (Rev. A) | PDF | HTML | 17 Nov 2022 |
| Technical article | Addressing 3 power design challenges for corner radar systems | PDF | HTML | 22 Dec 2023 | |
| Technical article | What ADAS engineers need to know about the new NCAP requirements for radar | PDF | HTML | 04 Jan 2022 | |
| Certificate | LP877451Q1EVM EU RoHS Declaration of Conformity (DoC) | 27 Sep 2021 |
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The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and (...)
| Package | Pins | Download |
|---|---|---|
| VQFN-HR (RXV) | 28 | View options |
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