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Product Detailed Parameters
- Description：AUTOMOTIVE THREE 3-A LOW-NOISE B
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Topology：Step-Down (Buck) (3), Step-Up (Boost) (1), Linear (LDO) (1)
- Number of Outputs：5
- Frequency - Switching：4.4MHz, 8.8MHz, 17.6MHz
- Voltage/Current - Output 1：0.9V ~ 1.9V, 3A
- Voltage/Current - Output 2：0.9V ~ 1.9V, 3A
- Voltage/Current - Output 3：0.9V ~ 1.9V, 3A
- w/LED Driver：No
- w/Supervisor：No
- w/Sequencer：No
- Voltage - Supply：3V ~ 4V
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：28-PowerVFQFN
- Supplier Device Package：28-VQFN-HR (4.5x5)
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LP87745101RXVRQ1 is an automotive-grade PMIC featuring three low-noise buck converters, a boost converter, and an LDO. It operates within a -40°C to +125°C temperature range in a VQFN-28 package. The buck outputs provide up to 3A current with adjustable voltages from 900mV to 1.9V. Switching frequencies are programmable at 4.4MHz, 8.8MHz, or 17.6MHz. The device includes SPI interface control, NVM programming, and comprehensive protection features for radar MMIC power management.
Feature Summary
- Integrates three high-current low-noise buck converters optimized for RF applications
- Includes integrated boost converter and LDO for complete system power sequencing
- Features programmable switching frequencies to minimize external filtering requirements
- Supports synchronized start/stop delays and GPO signals for complex power sequences
Applications
- Short-range and mid-angle automotive radar systems
- Long-range front-facing radar applications
- Ultra-short-range radar (USRR) modules
- Power supply for AWR and IWR MMIC devices
Procurement Notes
Verify the specific suffix '101' against the official Texas Instruments datasheet to confirm exact output configurations and factory default settings. Ensure compatibility with AEC-Q100 Grade 1 requirements for your target automotive environment. Cross-reference the VQFN-28 footprint dimensions during PCB layout to guarantee proper thermal dissipation and mechanical fitment.
Selection Notes
Select this component when designing power architectures for Texas Instruments mmWave radar sensors requiring precise low-noise regulation. It is suitable for applications needing synchronized multi-rail sequencing and high-frequency operation to reduce passive component size. Consider the integrated boost and LDO capabilities if space-constrained designs require consolidated power management solutions.
Part Context
This part belongs to the LP8774x-Q1 family of specialized power management ICs designed specifically for automotive radar systems. The series provides integrated solutions for powering AWR and IWR mmWave devices, combining multiple converter types into a single compact package to simplify board design and improve reliability in harsh automotive environments.
Replacement Considerations
Consult the LP8774x-Q1 family datasheet for pin-compatible alternatives with different factory presets or slight parameter variations. Verify that any substitute maintains the required 3A buck output capability and supports the necessary SPI communication protocol for your specific radar application.
