LP87721-Q1 - Automotive 3A 3-Channel Low-Noise Buck PMIC | Texas Instruments
MPN： LP87721-Q1 ✓ 啟用中LP87721-Q1 概覽
A PMIC, or Power Management IC, is a semiconductor device that integrates multiple voltage regulator channels, control logic, and sequencing functions into a single chip. It sits within the broader power management IC hierarchy, which is a subset of integrated circuits used to convert, regulate, and distribute power across a system. PMICs are essential for managing the multiple power rails required by processors, sensors, RF transceivers, and other analog and digital components.
Key features of the LP87721-Q1 include three independent buck converter channels, each capable of sourcing 3A, a low-noise design for sensitive radar signal chains, and automotive qualification. The integrated MOSFETs and control circuitry reduce external component count, simplifying board design. The device supports a wide input voltage range, although specific values require verification from the datasheet. The compact VQFN-HR package enables space-constrained designs typical of in-vehicle radar modules.
Architecturally, the LP87721-Q1 uses synchronous buck topology to achieve high efficiency, and the low-noise output is critical for maintaining radar signal integrity. The PMIC includes features for power sequencing, allowing controlled start-up of multiple rails. Detailed specifications such as switching frequency, output voltage accuracy, and quiescent current are documented in the TI datasheet (https://www.ti.com/product/LP87721-Q1).
Typical applications include automotive radar front ends, advanced driver assistance systems (ADAS), driver monitoring systems, and industrial radar. The device is particularly suited for powering radar processors and sensors, where multiple clean 3A rails are required. Its AEC-Q100 qualification ensures reliable operation under harsh automotive conditions.
When designing with the LP87721-Q1, pay attention to input and output capacitor selection to maintain stability and reduce noise. Ensure adequate PCB copper area for thermal dissipation, as the buck converters can dissipate significant power at high load. The sequencing feature should be utilized to maintain proper power-up order. For precise design guidance, refer to the TI application notes and reference designs.
直接替換替代品，適用於 LP87721-Q1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LP87721-Q1 （相同外形與佔位） — 差異在於 Automotive Grade, Number of Outputs, Topology.
LP87725101RAGRQ1
⚡ 相同封裝📋 參考替代品（不在目錄中）
LP87722-Q1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LP87723-Q1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LP87724-Q1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LP87725-Q1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LP87721-Q1 最大額定值與電氣特性
| 封裝 | 24-VQFN-HR (4x4) |
| 輸出數量 | 3 |
| Output Current per Channel | 3 A |
| 拓撲 | Buck (Step-Down) |
| Automotive Grade | AEC-Q100 Qualified (Q1) |
| 安裝類型 | Surface Mount |
| Application | Radar |
LP87721-Q1 24-vqfn-hr (4x4) 腳位配置指南
LP87721-Q1（24-vqfn-hr (4x4) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： LP87721-Q1.
請參閱 資料表 以查看完整腳位配置。
典型應用
LP87721-Q1 適用於 6 應用s: Automotive Radar, ADAS Power Management, Driver Monitoring Systems, Precision Analog Power Supply, Industrial Radar, Sensor Fusion Systems.
Automotive Radar
The LP87721-Q1 is specifically designed for automotive radar systems, providing three 3A low-noise buck rails to power radar processors and sensor front-ends. Its automotive AEC-Q100 qualification ensures reliable operation in -40C to +125C environments. The low-noise output minimizes interference with sensitive radar signal chains, while the compact VQFN-HR package saves PCB space in radar modules. Used with TI radar processors like TDA4VL21HGAALZRQ1, the PMIC enables a complete power solution for ADAS radar.
推薦
ADAS Power Management
In ADAS, the LP87721-Q1 manages multiple power rails for radar, cameras, and processing units. The three 3A buck converters can supply core, I/O, and analog voltages, reducing the number of discrete regulators. Its built-in sequencing prevents power-up errors in multi-rail systems. With a wide input range and automotive qualification, it suits 12V/24V vehicle power buses. The PMIC is a central element in ADAS ECUs, ensuring reliable power delivery under varying load conditions.
推薦
Driver Monitoring Systems
Driver monitoring systems (DMS) rely on power rails for sensors, processing, and communication. The LP87721-Q1 offers three 3A low-noise buck channels, ideal for powering always-on infotainment and DMS controllers. Its low-noise output reduces artifacts in sensor signals, improving monitoring accuracy. The AEC-Q100 grade ensures operation across automotive temperature ranges, making it a robust choice for interior sensing. The PMIC's compact size allows integration into space-limited DMS board designs.
推薦
Precision Analog Power Supply
Precision analog circuits in radar sensors require clean power supplies to maintain accuracy. The LP87721-Q1's low-noise buck converters provide clean 3A rails for analog front-ends and data converters. Compared to switching regulators, this PMIC reduces noise, but dissipated power depends on voltage drop. Proper filtering and layout are essential to maximize performance. The three-channel design allows dedicated supplies for sensors, amplifiers, and ADCs.
推薦
Industrial Radar
Beyond automotive, the LP87721-Q1 is suitable for industrial radar for automation and robotics. Its three 3A rails power radar-based distance sensors and position feedback systems. The wide input voltage tolerance supports industrial power supplies. Though AEC-Q100 qualified for automotive, it can be used in non-automotive harsh environments. The PMIC enables compact controller boards with minimal components, simplifying BOM.
推薦
Sensor Fusion Systems
Sensor fusion combines data from multiple sensors, including radar, LiDAR, and cameras. The LP87721-Q1 provides three clean 3A rails to power the fusion processor and peripherals. Its low-noise output ensures data integrity, and the automotive grade supports in-vehicle operation. The PMIC's sequencing feature powers up different domains in a controlled order, preventing initialization issues. This makes it a reliable power backbone for fusion ECUs.
推薦
推薦產品摘要
工程參考資料，適用於 LP87721-Q1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LP87725101RAGRQ1 | LP87722-Q1 | LP87723-Q1 | LP87724-Q1 | LP87725-Q1 |
|---|---|---|---|---|---|---|
| Package | 24-VQFN-HR (4x4) | 24-VQFN-HR (4x4) | 24-VQFN-HR (4x4) | 24-VQFN-HR (4x4) | 24-VQFN-HR (4x4) | 24-VQFN-HR (4x4) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Outputs | 3 | 5 | 3 | 3 | 3 | 3 |
| Topology | Buck (Step-Down) | Buck (Step-Down) | Buck (Step-Down) | Buck (Step-Down) | Buck (Step-Down) | Buck (Step-Down) |
| Automotive Grade | AEC-Q100 (Q1) | AEC-Q100 (Q1) | AEC-Q100 (Q1) | AEC-Q100 (Q1) | AEC-Q100 (Q1) | AEC-Q100 (Q1) |
主要差異化特點
- Three dedicated 3A low-noise buck channels (對比TPS659039-Q1)
- AEC-Q100 qualified for automotive (對比LP87702)
- Compact 24-VQFN-HR package (對比TPS65386x-Q1)
設計說明
The LP87721-Q1 contains three buck converters that can each source 3A; total power dissipation can be significant. Ensure adequate PCB copper area and vias for heat spreading. Use a thermal pad in the VQFN package. Monitor junction temperature; if operating at high ambient, consider reducing load or adding airflow. Verify thermal resistance and derating from the datasheet.
Place input capacitors close to each buck input, and output capacitors close to the inductor outputs. Use a solid ground plane and separate digital and analog grounds if possible. The low-noise channels require careful routing to avoid inductive loops. Follow the reference layout in the TI application note.
Do not ignore the input voltage range; exceeding maximum can damage the IC. Ensure proper power sequencing using the EN pins. Avoid using oversized inductor values that may cause instability. Verify the output voltage divider resistors for accuracy. [DATA_NEEDED: specific sequencing requirements]
合規資訊
AEC-Q100 qualified per Q1 suffix. RoHS/REACH status not provided in verified data.
