LP87721-Q1 - Automotive 3A 3-Channel Low-Noise Buck PMIC | Texas Instruments
MPN: LP87721-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
Drop-in alternatives for LP87721-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LP87725101RAGRQ1
β‘ Same Packageπ Reference alternative (not in catalog)
LP87722-Q1
β Drop-Inπ Reference alternative (not in catalog)
LP87723-Q1
β Drop-Inπ Reference alternative (not in catalog)
LP87724-Q1
β Drop-Inπ Reference alternative (not in catalog)
LP87725-Q1
β Drop-Inβ In Stock
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View Datasheet βLP87721-Q1 Maximum Ratings & Electrical Characteristics
| Package | 24-VQFN-HR (4x4) |
| Number of Outputs | 3 |
| Output Current per Channel | 3 A |
| Topology | Buck (Step-Down) |
| Synchronous Rectification | [DATA_NEEDED: Synchronous Rectification] |
| Input Voltage Range | [DATA_NEEDED: Input Voltage] |
| Output Voltage Range | [DATA_NEEDED: Output Voltage] |
| Switching Frequency | [DATA_NEEDED: Switching Frequency] |
| Quiescent Current | [DATA_NEEDED: Quiescent Current] |
| Output Noise | [DATA_NEEDED: Output Noise] |
| Operating Temperature Range | [DATA_NEEDED: Operating Temperature] |
| Automotive Grade | AEC-Q100 Qualified (Q1) |
| Mounting Type | Surface Mount |
| RoHS Status | [DATA_NEEDED: RoHS] |
| Supply Voltage | [DATA_NEEDED: Supply Voltage] |
| Communication Interface | [DATA_NEEDED: I2C/SPI] |
| MSL Level | [DATA_NEEDED: MSL Level] |
| Application | Radar |
LP87721-Q1 24-vqfn-hr (4x4) Pin Configuration Guide
Complete pinout information for LP87721-Q1 (24-vqfn-hr (4x4) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for LP87721-Q1.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LP87721-Q1 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for LP87721-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| Output Current per Channel | 3 A | [DATA_NEEDED] | 3 A | 3 A | 3 A | 3 A |
| 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) |
| Output Voltage Range | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Switching Frequency | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Three dedicated 3A low-noise buck channels (vs TPS659039-Q1)
- AEC-Q100 qualified for automotive (vs LP87702)
- Compact 24-VQFN-HR package (vs TPS65386x-Q1)
Design Notes
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]
Compliance Information
AEC-Q100 qualified per Q1 suffix. RoHS/REACH status not provided in verified data.
