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: 3.3 V nominal (3 V to 4 V range)
- Three low-noise step-down DC/DC converters:
- Output voltage: 0.9 V to 1.9 V, 0.8 V (BUCK3), 0.82 V (BUCK3)
- Maximum output current: 3 A/ 3 A/ 3 A
- Switching frequency: 4.4 MHz, 8.8 MHz, and 17.6 MHz
- 5 V boost converter
- Maximum output current: 350 mA
- 150 mA LDO
- Output voltage 1.8 V or 3.3 V
- Output short-circuit and overload protection
- Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
- Overtemperature warning and protection
- Serial peripheral interface (SPI)
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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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LP87745-Q1 Three Buck Converters and 5-V Boost for AWR and IWR Radar Sensors datasheet (Rev. A) | PDF | HTML | 2022年 11月 17日 |
| Technical article | Addressing 3 power design challenges for corner radar systems | PDF | HTML | 2023年 12月 22日 | |
| Technical article | What ADAS engineers need to know about the new NCAP requirements for radar | PDF | HTML | 2022年 1月 4日 | |
| Certificate | LP877451Q1EVM EU RoHS Declaration of Conformity (DoC) | 2021年 9月 27日 |
設計與開發
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LP877451Q1EVM — 適用於 ADAS PMIC 低雜訊配置 3 降壓和 5-V 升壓的 LP8774x-Q1 評估模組
LP8774x-Q1 裝置設計旨在滿足各種汽車與工業雷達應用中的 AWR 和 IWR MMIC 電源管理需求。本裝置配備三個降壓式 DC/DC 轉換器、5 V 升壓轉換器和 1.8 V/3.3 V LDO。LDO 由升壓供電，用於 xWR 與周邊裝置 IO 供電。本裝置由 SPI 序列介面及啟用訊號控制。
降壓式 DC/DC 轉換器支援 17.6 MHz、8.8 MHz 或 4.4 MHz 的可編程切換頻率，並在廣泛頻率範圍中擁有低雜訊，以最小或無需額外被動式濾波實現免 LDO 電源解決方案。LP8774x-Q1 (...)
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| 封裝 | 引腳 | 下載 |
|---|---|---|
| VQFN-HR (RXV) | 28 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。