Application software & framework
LP8774X-Q1DOCUMENTS — LP8774x-Q documents
LP8774x-Q documents
LP87745-Q1
Automotive three 3-A low-noise buck converter, IO LDO & 5-V boost converter PMIC for radar MMICs
Data sheet
LP87745-Q1
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature
- Functional safety-compliant device
- Developed for functional safety applications
- Documentation available to aid ISO 26262 functional safety system design up to ASIL-C / SIL-2
- Input supply overvoltage and undervoltage monitoring
- Regulator output overvoltage and undervoltage monitoring
- Overvoltage and undervoltage monitoring for one external rail
- Q&A watchdog
- Level or PWM error signal monitor (ESM)
- BIST and CRC
- Input voltage: 3.3V nominal (3V to 4V range)
- Three low-noise step-down DC/DC converters:
- Output voltage: 0.9V to 1.9V, 0.8V (BUCK3), 0.82V (BUCK3)
- Maximum output current: 3A/ 3A/ 3A
- Switching frequency: 4.4MHz, 8.8MHz, and 17.6MHz
- 5V boost converter
- Maximum output current: 350mA
- 150mA LDO
- Output voltage 1.8V or 3.3V
- Output short-circuit and overload protection
- Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
- Overtemperature warning and protection
- Serial peripheral interface (SPI)
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 5V boost converter and a 1.8V or 3.3V 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 4.4MHz, 8.8MHz, or 17.6MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. The high switching frequency 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 LP8774x-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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Technical documentation
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View all 5 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LP8774x-Q1 Three Buck Converters and 5-V Boost for AWR and IWR Radar Sensors datasheet (Rev. B) | PDF | HTML | 24 Jun 2024 |
| White paper | mmWave Radar for Safe Sensing in Industrial Stationary and Mobile Applications | PDF | HTML | 28 Jan 2025 | |
| 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 |
Design & development
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN-HR (RXV) | 28 | Ultra Librarian |
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