Texas Instruments LP875610RNFRQ1

Overview

LP875610RNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four integrated high-efficiency DC/DC cores configured as a single 4-phase output delivering up to 16 A total (4 A per phase), 2.8 V–5.5 V input range, 0.6 V–3.36 V programmable output voltage, and 2 MHz fixed switching frequency - used in infotainment and ADAS domain controllers requiring tight voltage regulation and dynamic load response.

For engineers reviewing the LP875610RNFRQ1 datasheet, LP875610RNFRQ1 pinout, LP875610RNFRQ1 application, or LP875610RNFRQ1 equivalent, key selection criteria include multiphase current balancing accuracy, I²C-configurable slew rate (0.47–10 mV/µs), PGOOD programmability, thermal warning/shutdown thresholds, and support for remote differential sensing at point-of-load.

Technical Context

The LP875610RNFRQ1 implements automatic PWM-to-PFM mode transition and dynamic phase adding/shedding (e.g., 1→2→3→4 phases at 1 A / 2 A / 3 A load thresholds) to maintain >85% efficiency across 1 mA–16 A output current. Its four synchronous buck stages share a common control loop with interleaved 90° phase offsets and spread-spectrum modulation to reduce EMI.

It integrates an I²C interface supporting Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes, plus three configurable GPIOs (EN1/EN2/EN3) usable for sequencing external regulators or processor reset, and supports external clock synchronization via CLKIN pin for deterministic timing in multi-rail systems.

Key Specifications

Pinout & Package

VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size, 0.4 mm pitch, with exposed thermal pad - optimized for automotive thermal cycling reliability and board-level reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multiphase buck converter applications.

Compared with LP87562-Q1 and TPS65917-Q1, the LP875610RNFRQ1 uniquely delivers 16 A from a single 4-phase architecture with best-in-class current sharing, thermal derating, and EMI performance - making it the optimal choice for next-generation automotive domain controllers demanding high-density, high-efficiency power delivery.

Availability

LP875610RNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS radar processing, and digital cluster applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP875610RNFRQ1 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 company specializing in analog and embedded processing technologies, with deep expertise in automotive-grade power management ICs and functional safety certification.

The LP8756x-Q1 product line was designed specifically for high-current, low-voltage power delivery in automotive domain controllers - emphasizing thermal robustness, EMI control, and seamless integration with modern SoCs via I²C and GPIO sequencing.

FAQ

What is the maximum output current capability of the LP875610RNFRQ1?

The LP875610RNFRQ1 delivers up to 16 A total output current in its native 4-phase configuration, with each phase rated for 4 A continuous operation. This rating assumes VIN ≥3 V; at 2.8 V ≤VIN <3 V, maximum output is reduced to 12 A due to reduced headroom. The device enforces per-phase forward current limits (programmable 1.5–5 A) and monitors die temperature to prevent thermal overload.

Does the LP875610RNFRQ1 support remote voltage sensing?

Yes, the LP875610RNFRQ1 supports true remote differential voltage sensing using dedicated FB_Bx pins and complementary ground-sense terminals (e.g., FB_B0 as positive sense and FB_B1 as negative sense for BUCK0). This compensates for IR drop across PCB traces between the regulator output and point-of-load, maintaining ±2% output accuracy even with 50 mΩ trace resistance.

How does the LP875610RNFRQ1 handle light-load efficiency?

The LP875610RNFRQ1 automatically transitions from PWM to PFM mode below 200 mA (PWM-to-PFM threshold) and adds/drops phases dynamically: 4-phase operation above 3 A, 3-phase from 1.5–3 A, 2-phase from 0.7–1.5 A, and 1-phase below 0.7 A. This preserves >85% efficiency from 1 mA to full load while minimizing quiescent current (6.7 µA in standby).

Can the LP875610RNFRQ1 be synchronized to an external clock?

Yes, the LP875610RNFRQ1 accepts an external clock signal on the CLKIN pin, supporting nominal frequencies from 1 MHz to 24 MHz with ±30% tolerance. Upon detection, the internal PLL locks within 600 µs, and the switching clock synchronizes to the external source - critical for noise-sensitive applications like camera ISPs where deterministic EMI placement is required.

What protection features are integrated into the LP875610RNFRQ1?

The LP875610RNFRQ1 integrates overvoltage protection (OVP) and undervoltage lockout (UVLO) on VANA, output short-circuit and overload protection per phase, overtemperature warning (configurable 115–147 °C) and shutdown (140–160 °C), and programmable PGOOD monitoring with rising/falling thresholds (±8–20 mV). All protections are AEC-Q100 validated for automotive reliability.