Texas Instruments LP87524TRNFTQ1

Overview

LP87524TRNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade quad-buck DC/DC converter IC configured exclusively for four independent 1-phase outputs, each delivering up to 4.0 A at VIN ≥3 V (3.0 A at 2.8–3 V), with programmable 0.6–3.36 V output voltage, 2 MHz switching frequency, and I²C interface supporting up to 3.4 MHz. It powers infotainment SoCs, ADAS camera sensors, and cluster displays requiring tightly regulated, low-noise, phase-isolated rails.

For engineers reviewing the LP87524TRNFTQ1 datasheet, LP87524TRNFTQ1 pinout, LP87524TRNFTQ1 application, or LP87524TRNFTQ1 equivalent, key selection criteria include per-phase current capability (4 A max), 1-phase-only configuration flexibility, automotive thermal robustness (–40°C to +125°C ambient), and integrated current sensing without external resistors.

Technical Context

The LP87524TRNFTQ1 implements four fully independent synchronous buck regulators-each with dedicated high-side (29–65 mΩ) and low-side (17–35 mΩ) FETs, individual feedback (FB_B0–FB_B3), input (VIN_B0–VIN_B3), and switch-node (SW_B0–SW_B3) pins-enabling true rail isolation and independent sequencing. Its AUTO mode dynamically transitions between PFM (for light-load efficiency) and PWM (for regulation accuracy), with programmable slew rate (0.47–10 mV/µs) and soft-start timing (200 µs to 0.35 V).

Control is executed via a 3.4-MHz-capable I²C interface with interrupt (nINT), power-good (PGOOD), reset (NRST), and three configurable GPIOs (EN1–EN3), while remote differential sensing supports point-of-load accuracy. Thermal warning (115–147°C) and shutdown (140–160°C) thresholds ensure operation within AEC-Q100 Grade 1 limits.

Key Specifications

Pinout & Package

The LP87524TRNFTQ1 is housed in a 26-pin VQFN-HR package (4.5 mm × 4.0 mm, 0.35 mm pitch) with exposed thermal pad. Pin functions are electrically isolated per buck channel to support independent routing and grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-buck regulator applications.

Compared with LP87523TRNFTQ1 and TPS65917B1ZWSR, the LP87524TRNFTQ1 uniquely delivers four truly independent 1-phase rails with per-phase current measurement and programmable slew control - making it optimal for noise-sensitive, multi-domain automotive systems where rail coupling must be avoided.

Availability

LP87524TRNFTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply across extended temperature and long production lifecycles.

Supply support for LP87524TRNFTQ1 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 power management solutions, with decades of AEC-Q100 qualification expertise.

The LP8752x-Q1 product line was designed specifically for automotive processor power delivery - emphasizing multiphase flexibility, functional safety compliance, and robust operation in harsh vehicular environments.

FAQ

What is the maximum output current per phase for LP87524TRNFTQ1?

The LP87524TRNFTQ1 delivers up to 4.0 A per phase when input voltage is ≥3 V, and 3.0 A per phase at 2.8–3 V input. This is specified in the Electrical Characteristics table under IOUT for 1-phase output configuration. The device's four independent phases do not share current limit resources - each maintains its own forward current limit (1.5–5 A programmable range) and thermal monitoring.

Does LP87524TRNFTQ1 support remote voltage sensing?

Yes, LP87524TRNFTQ1 supports remote differential voltage sensing for each buck output using dedicated FB_Bx pins. This compensates for IR drop between the regulator output and point-of-load, improving output voltage accuracy - especially critical for low-voltage rails like 0.8 V CPU cores where ±20 mV tolerance is required.

Can LP87524TRNFTQ1 be synchronized to an external clock?

Yes, LP87524TRNFTQ1 accepts an external clock via the CLKIN pin (1–24 MHz nominal), enabling synchronization to system master clocks to reduce beat-frequency EMI. Clock detection includes 1.8 µs missing-clock delay and 20 µs debounce; valid clock detection triggers a 600 µs internal delay before switching to external clock source.

How does LP87524TRNFTQ1 handle thermal protection?

LP87524TRNFTQ1 features configurable thermal warning (115–147°C) and shutdown (140–160°C) thresholds with 20°C hysteresis. Warning events trigger an interrupt via nINT; shutdown forces all regulators off. These thresholds meet AEC-Q100 Grade 1 requirements and are monitored continuously regardless of operating mode (PWM or PFM).

Is LP87524TRNFTQ1 pin-compatible with other LP8752x-Q1 variants?

No, LP87524TRNFTQ1 is not pin-compatible with LP87521–LP87525-Q1 despite sharing the same VQFN-HR package and pin count. Internal phase mapping, current sharing logic, and register defaults differ - for example, FB_B1 serves as negative feedback for BUCK0 in LP87524TRNFTQ1 but has different routing in LP87522TRNFTQ1. Board redesign is required for substitution.