Texas Instruments LP873200RHDRQ1

Overview

LP873200RHDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC integrating two high-current synchronous buck converters (2 A per phase, 0.7–3.36 V) and two linear regulators (300 mA, 0.8–3.3 V), all in a single 5-mm × 5-mm VQFN-28 package with wettable flanks. It supports dual-phase or independent single-phase buck operation, remote differential feedback, programmable slew rate (0.5–10 mV/µs), and I²C-controlled sequencing for head units, camera modules, and radar ECUs.

For engineers reviewing the LP873200RHDRQ1 datasheet, LP873200RHDRQ1 pinout, LP873200RHDRQ1 application, or LP873200RHDRQ1 equivalent, this device delivers verified dual-buck + dual-LDO integration with automotive-grade thermal protection, EMI-reduction features (spread-spectrum, phase interleaving), and precise power-good monitoring - critical for safety-compliant ADAS and infotainment systems.

Technical Context

The LP873200RHDRQ1 implements a configurable multi-phase architecture: its two buck stages can operate independently as single-phase regulators or combine into a single dual-phase regulator with automatic phase adding/shedding (1000 mA add / 650 mA shed thresholds) and current balancing (<10% mismatch). Remote differential sensing on FB_B1 in dual-phase mode compensates IR drop to improve point-of-load voltage accuracy.

Control is fully I²C-compatible (up to 3.4 MHz High-Speed mode), supporting programmable startup/shutdown sequences synchronized to EN and GPO signals. The integrated PLL accepts external clocks (1–24 MHz) and enables synchronization to minimize system-level switching noise, while AUTO mode dynamically transitions between PWM and PFM to maintain >90% efficiency across 10 mA–4 A output range.

Key Specifications

Pinout & Package

LP873200RHDRQ1 uses a 28-pin VQFN package (5.00 mm × 5.00 mm) with exposed thermal pad connected to PCB ground plane via multiple vias for optimal thermal performance (R_θJB = 8.9°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-buck + dual-LDO power management applications.

Compared with TPS653210-Q1 and LP873320RHDRQ1, the LP873200RHDRQ1 provides optimal current density for dual-core ADAS processors without redundant safety peripherals or unused boost circuitry - reducing thermal load and enabling smaller heatsinking in space-constrained radar modules.

Availability

LP873200RHDRQ1 is available at Aetrix Electronics and suitable for automotive head units, camera modules, and radar ECUs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP873200RHDRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.

The LP8732xx-Q1 product line was designed specifically for automotive ADAS and infotainment power delivery - integrating high-efficiency conversion, precise sequencing, and robust fault protection into compact Q1-qualified packages.

FAQ

What is the maximum supported output current for each buck regulator in the LP873200RHDRQ1?

The LP873200RHDRQ1 supports up to 2 A per buck regulator in single-phase mode. In dual-phase configuration, the combined output current reaches 4 A with current balancing <10% mismatch. This is achieved using internal 50–110 mΩ high-side and 45–90 mΩ low-side FETs, with programmable forward current limit (1.5–3 A per phase) and thermal derating based on junction temperature.

Does the LP873200RHDRQ1 support remote voltage sensing, and how is it implemented?

Yes, the LP873200RHDRQ1 supports true remote differential voltage sensing in dual-phase configuration: FB_B0 serves as the positive sense point for Buck 0, while FB_B1 acts as the negative (return) sense point - enabling compensation of IR drop between the regulator output and point-of-load. This configuration improves DC output voltage accuracy to ±0.5% at the load, critical for SoC core rails.

How does the LP873200RHDRQ1 reduce electromagnetic interference (EMI)?

The LP873200RHDRQ1 reduces EMI through three integrated methods: (1) spread-spectrum modulation of the 2-MHz switching clock, (2) phase interleaving between the two buck stages in dual-phase mode, and (3) programmable slew-rate control (0.5–10 mV/µs) to limit dv/dt-induced noise. These features collectively lower peak EMI by >10 dB, easing CISPR 25 Class 5 compliance in automotive environments.

Can the LP873200RHDRQ1 be synchronized to an external clock, and what is the acceptable frequency range?

Yes, the LP873200RHDRQ1 supports external clock synchronization via the CLKIN pin (also configurable as GPO2). The accepted external clock frequency ranges from 1 MHz to 24 MHz. The internal PLL locks to this input and ensures the buck switching frequency remains above 1.7 MHz - preventing subharmonic oscillation and enabling deterministic noise placement for EMI filtering.

What protection features are built into the LP873200RHDRQ1 for automotive reliability?

The LP873200RHDRQ1 includes overtemperature warning (115–135°C, configurable) and shutdown (140–160°C), overvoltage protection (OVP) and undervoltage lockout (UVLO) on VANA, buck short-circuit detection (280–440 mV), LDO short-circuit detection (190–450 mV), and programmable PGOOD monitoring with deglitching (4–15 µs). All protections meet AEC-Q100 Grade 1 requirements for −40°C to +125°C ambient operation.