Texas Instruments LP87562RRNFRQ1

Overview

LP87562RRNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four integrated MOSFETs, configured as one 3-phase and one 1-phase output delivering up to 12 A total (9 A at VIN < 3 V), 2 MHz switching frequency, and I²C programmable voltage slew rate from 0.47 to 10 mV/µs. It powers infotainment SoCs and radar processors requiring tight transient response and remote differential sensing.

For engineers reviewing the LP87562RRNFRQ1 datasheet, LP87562RRNFRQ1 pinout, LP87562RRNFRQ1 application, or LP87562RRNFRQ1 equivalent, key selection criteria include its dual-output phase configuration (3+1), automotive-grade thermal protection (140°C shutdown), programmable PGOOD thresholds, and support for external clock synchronization - all critical for ADAS power rail design.

Technical Context

The LP87562RRNFRQ1 implements automatic PWM-to-PFM mode transition and dynamic phase shedding (e.g., 3-phase → 1-phase at ≤0.7 A load) to maintain high efficiency across 1 mA–12 A output current range. Its four independent buck cores are hardwired into a fixed 3+1 phase topology, not software-reconfigurable like LP87564-Q1's four 1-phase mode.

Remote differential voltage sensing on FB_B0–FB_B3 enables IR-drop compensation at point-of-load for ±0.4% DC output accuracy (at VOUT ≥1 V, PWM mode). The device integrates a PLL for jitter-controlled clock generation and supports spread-spectrum operation to reduce EMI in sensitive automotive RF environments.

Key Specifications

Pinout & Package

LP87562RRNFRQ1 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_B0–VIN_B3, SW_B0–SW_B3, FB_B0–FB_B3) and share analog/digital ground planes (AGND, PGND_B01, PGND_B23).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP87563RNNRQ1 and TPS65917B1RSLRQ1, LP87562RRNFRQ1 delivers the highest continuous current in a 3+1 configuration while maintaining 2 MHz operation and automotive thermal robustness - making it optimal for radar and high-performance infotainment core supplies where phase count and efficiency at mid-load are critical.

Availability

LP87562RRNFRQ1 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 LP87562RRNFRQ1 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 and embedded processing technologies, with deep expertise in automotive power management ICs.

The LP8756x-Q1 product line was designed specifically for next-generation automotive processors, emphasizing multiphase efficiency, functional safety features, and seamless integration with SoC power sequencing requirements.

FAQ

What is the maximum output current capability of the LP87562RRNFRQ1?

The LP87562RRNFRQ1 delivers up to 12 A total output current: 9 A from its 3-phase rail (at VIN ≥3 V) and 4 A from its dedicated 1-phase rail (at VIN ≥3 V). At lower input voltages (2.8 V ≤ VIN < 3 V), the 3-phase rail is rated for 6 A and the 1-phase rail for 3 A. These values reflect actual silicon-limited performance under thermal and electrical constraints defined in the datasheet.

Does the LP87562RRNFRQ1 support remote voltage sensing?

Yes, the LP87562RRNFRQ1 supports true remote differential voltage sensing via dedicated FB_Bx pins for each buck channel. FB_B1 and FB_B3 can alternatively serve as negative feedback inputs for adjacent rails, enabling Kelvin connections to the point-of-load to compensate for PCB trace resistance and maintain ±0.4% DC output accuracy under load.

Can the LP87562RRNFRQ1 be synchronized to an external clock?

Yes, the LP87562RRNFRQ1 accepts an external clock signal on the CLKIN pin, supporting input frequencies from 1 MHz to 24 MHz. This allows precise alignment of switching edges with system clocks to suppress beat frequencies and simplify EMI filtering in multi-converter automotive ECUs.

What protection features does the LP87562RRNFRQ1 include?

The LP87562RRNFRQ1 integrates overvoltage protection (OVP), undervoltage lockout (UVLO), overtemperature warning and shutdown (125°C warning, 150°C shutdown), output short-circuit and overload protection, and programmable PGOOD monitoring. All protections are hardware-based and operate independently of I²C communication.

Is the LP87562RRNFRQ1 pin-compatible with other LP8756x-Q1 variants?

No, the LP87562RRNFRQ1 is not pin-compatible with LP87561-Q1, LP87563-Q1, LP87564-Q1, or LP87565-Q1. While all share the same 26-pin VQFN-HR package and pinout, their internal phase configurations differ fundamentally - e.g., LP87562RRNFRQ1 routes FB_B2 exclusively to BUCK2, whereas LP87564-Q1 assigns all FB pins to independent 1-phase rails. Firmware and layout must be validated per variant.