Texas Instruments LP87525BRNFTQ1

Overview

LP87525BRNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with two independent 2-phase DC/DC outputs, delivering up to 10 A total output current across a 2.8 V–5.5 V input range and programmable 0.6 V–3.36 V output voltage per rail. It integrates high-side/low-side FETs, supports I²C (up to 3.4 MHz), phase interleaving, spread-spectrum operation, and remote differential sensing for infotainment and ADAS power rails.

For engineers reviewing the LP87525BRNFTQ1 datasheet, LP87525BRNFTQ1 pinout, LP87525BRNFTQ1 application, or LP87525BRNFTQ1 equivalent, key selection criteria include its dual 2-phase configuration, automotive-grade thermal protection (140°C shutdown), programmable GPIOs (EN1–EN3), PGOOD signaling, and support for load-current measurement without external sense resistors.

Technical Context

The LP87525BRNFTQ1 implements four synchronous buck cores configured exclusively as two independent 2-phase outputs-enabling higher current capability and lower ripple per rail versus single-phase alternatives. Each 2-phase rail uses automatic phase shedding (e.g., 2→1 phase at ≤0.7 A) and adding (≥1 A), with PWM-to-PFM transition at 200 mA and PFM-to-PWM at 600 mA.

It features integrated 29 mΩ (HS) / 17 mΩ (LS) FETs per phase, 2 MHz nominal switching frequency (±10%), and supports external clock synchronization (1–24 MHz). Remote differential feedback (FB_Bx pins) compensates for IR drop between regulator and point-of-load, improving output voltage accuracy under dynamic load conditions.

Key Specifications

Pinout & Package

VQFN-HR (RNF) package, 26-pin, 4.50 mm × 4.00 mm body size with exposed thermal pad. Pin count and layout match LP8752x-Q1 family; thermal pad must be soldered for rated 10 A operation and thermal performance (R_θJB = 4.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP87524BRNFTQ1 and TPS65917B1ZWSR, the LP87525BRNFTQ1 delivers superior ripple suppression and current capability per rail through dedicated 2-phase architecture, making it optimal for high-performance automotive processors where rail stability and thermal margin are critical.

Availability

LP87525BRNFTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS radar, and digital cluster power applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP87525BRNFTQ1 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 leadership in automotive power management and high-reliability IC design.

The LP8752x-Q1 product line was engineered specifically for next-generation automotive processors, delivering high-efficiency, multi-phase DC/DC conversion with integrated protection, sequencing, and diagnostics for safety-critical power domains.

FAQ

What is the maximum output current supported by the LP87525BRNFTQ1?

The LP87525BRNFTQ1 supports up to 10 A total output current - distributed as two independent 2-phase rails, each capable of 5 A. This rating assumes proper thermal management (R_θJB ≤ 4.7°C/W), 2.8–5.5 V input, and use of recommended external components (0.47 µH inductors, 22 µF/phase output capacitance). The device enforces per-phase forward current limits (1.5–5 A) and thermal shutdown at 140–160°C to protect against overload.

Does the LP87525BRNFTQ1 support remote voltage sensing?

Yes, the LP87525BRNFTQ1 supports true remote differential voltage sensing via dedicated FB_B0–FB_B3 pins. Each feedback pair connects directly to the point-of-load to compensate for IR drop across PCB traces and connectors. For example, FB_B0/FB_B1 monitor the first 2-phase rail, while FB_B2/FB_B3 monitor the second - enabling ±0.5% output accuracy at the load even with 150 mΩ trace resistance.

Can the LP87525BRNFTQ1 operate with an external clock source?

Yes, the LP87525BRNFTQ1 accepts an external clock on the CLKIN pin (Pin 3) within 1–24 MHz, with ±30% frequency tolerance. When enabled, the internal PLL synchronizes switching to the external clock, reducing EMI interference in noise-sensitive automotive systems. Clock detection includes 20 µs debounce and 600 µs delay before switching to external timing - ensuring glitch-free transitions.

How does the LP87525BRNFTQ1 handle power-good signaling?

The LP87525BRNFTQ1 provides a dedicated open-drain PGOOD pin (Pin 16) with programmable thresholds: overvoltage detection (39–64 mV above nominal) and undervoltage detection (–53 to –29 mV below nominal). Debounce time is configurable via register (4 µs or 10–13 ms), and status bits (BUCKx_PG_STAT) flag faults independently per rail. This enables precise power-rail validation before processor release from reset.

What protection features are integrated into the LP87525BRNFTQ1?

The LP87525BRNFTQ1 integrates comprehensive protection: overtemperature warning (115–147°C) and shutdown (140–160°C), output short-circuit and overload protection, VANA overvoltage (5.45–6.1 V) and undervoltage lockout (2.5–2.75 V), and per-phase forward/negative current limiting (1.5–5 A / 1.6–2.4 A). All protections trigger automatic fault reporting via nINT and I²C status registers - no external circuitry required.