Texas Instruments LP87524TRNFRQ1

Overview

LP87524TRNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four independent 1-phase DC/DC regulators, 2.8–5.5 V input range, 0.6–3.36 V programmable output voltage per channel, and 4.0 A maximum output current per phase at ≥3 V input. It delivers precise power to infotainment SoCs and camera sensor rails in space-constrained automotive modules.

For engineers reviewing the LP87524TRNFRQ1 datasheet, LP87524TRNFRQ1 pinout, LP87524TRNFRQ1 application, or LP87524TRNFRQ1 equivalent, this page provides verified electrical specs, validated I²C timing modes up to 3.4 MHz, confirmed thermal metrics (R_θJA = 34.6°C/W), and real-world multiphase configuration constraints for automotive power sequencing.

Technical Context

The LP87524TRNFRQ1 implements four fully independent synchronous buck converters-each configurable as a standalone 1-phase rail-enabling flexible power delivery to heterogeneous loads such as display interfaces, image signal processors, and radar MMICs. Its AUTO mode dynamically switches between PWM and PFM based on load, while phase shedding (e.g., 2→1-phase at 0.7 A) maintains high efficiency across 0.1–4.0 A per rail.

It supports remote differential voltage sensing per channel via dedicated FB pins, enabling accurate point-of-load regulation despite PCB IR drop. The integrated 2 MHz switching frequency (±10%), spread-spectrum operation, and programmable slew rate (0.47–10 mV/µs) reduce EMI and inrush during startup or voltage transitions.

Key Specifications

Pinout & Package

LP87524TRNFRQ1 uses 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; VIN_Bx and SW_Bx pins are not internally connected and must be externally tied and bypassed locally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail buck converter applications.

Compared with LP87524TRNFRQ1, LP87523TRNFRQ1 offers higher current scalability on one rail but less granular per-rail independence, while LP87525TRNFRQ1 sacrifices 1-phase flexibility for improved ripple suppression in dual-heavy-load scenarios-making LP87524TRNFRQ1 optimal for heterogeneous, space-constrained ADAS modules requiring four distinct voltage domains.

Availability

LP87524TRNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera systems, and digital cluster designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP87524TRNFRQ1 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-grade power management solutions with decades of automotive qualification expertise.

The LP8752x-Q1 product line was designed specifically for next-generation automotive ADAS and infotainment platforms, delivering high-efficiency, configurable multi-rail power with integrated diagnostics and functional safety features.

FAQ

What is the maximum output current per channel for LP87524TRNFRQ1?

The LP87524TRNFRQ1 supports up to 4.0 A per 1-phase channel when input voltage is ≥3 V. At 2.8–3 V input, the maximum drops to 3.0 A per channel due to reduced headroom. This rating is validated across –40°C to +125°C ambient and accounts for thermal derating in the 26-pin VQFN-HR package. Each channel operates independently, so total device current capability is 4 × 4.0 A only if thermally feasible and properly laid out.

Does LP87524TRNFRQ1 support I²C communication at 3.4 MHz?

Yes, LP87524TRNFRQ1 fully supports High-Speed I²C mode at 3.4 MHz (with C_b ≤ 100 pF), as specified in Section 7.6 of the datasheet. It also supports Standard (100 kHz), Fast (400 kHz), and Fast+ (1 MHz) modes. Logic-level compatibility requires SDA/SCL pulled to 1.65–1.95 V or 3.1–3.6 V depending on speed mode, and timing parameters like t_LOW (160 ns min) and t_SU;DAT (10 ns min) must be met in system design.

How does LP87524TRNFRQ1 handle thermal protection?

LP87524TRNFRQ1 implements dual-stage thermal management: die temperature warning triggers at 115–135°C (configurable), generating an interrupt before shutdown; thermal shutdown activates at 140–160°C with 20°C hysteresis. Both thresholds are AEC-Q100 Grade 1 qualified. The device reports temperature via I²C register and asserts nINT pin, allowing host MCU to throttle loads or log faults prior to shutdown.

Can LP87524TRNFRQ1 be used with different input voltages per channel?

No-LP87524TRNFRQ1 requires all VIN_B0–VIN_B3 pins to be connected to the same input source. Although the pins are physically separate and must be externally tied together with local bypassing, internal connections do not exist. Using disparate input sources would violate absolute maximum ratings and compromise reliability. The device is designed for single-input, multi-output operation.

What is the purpose of the NRST pin on LP87524TRNFRQ1?

The NRST pin is an active-low reset input that initializes internal registers and disables all buck regulators when pulled low. It features a built-in 650–1700 kΩ pulldown resistor and accepts 1.65–5.5 V logic levels. During power-up, holding NRST low until VANA and VIN stabilize ensures predictable startup behavior. It is not intended for watchdog reset cycling but for controlled system initialization sequences.