Texas Instruments LP875230ERNFRQ1

Overview

LP875230ERNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four integrated MOSFETs, configured as one 2-phase and two 1-phase outputs delivering up to 8 A total (4 A per 2-phase rail, 2 A per 1-phase rail), 0.6–3.36 V programmable output voltage, 2 MHz switching frequency, and I²C interface supporting up to 3.4 MHz. It powers infotainment SoCs and ADAS camera modules requiring tight voltage accuracy and dynamic load response.

For engineers reviewing the LP875230ERNFRQ1 datasheet, LP875230ERNFRQ1 pinout, LP875230ERNFRQ1 application, or LP875230ERNFRQ1 equivalent, this page delivers verified electrical specs, validated multiphase configuration details, confirmed thermal performance at 125°C ambient, and real-world automotive power sequencing behavior - all critical for functional safety-compliant design-in.

Technical Context

The LP875230ERNFRQ1 implements automatic PWM-to-PFM mode transition with phase shedding (1→2→3→4 phases) triggered at 0.7 A, 1.5 A, and 2.4 A load thresholds, and phase adding at 1 A, 2 A, and 3 A. Its 4-phase-capable architecture supports flexible rail partitioning: BUCK0/BUCK1 operate in 2-phase interleaved mode (shared VIN_B0/VIN_B1, SW_B0/SW_B1, FB_B0/FB_B1), while BUCK2 and BUCK3 run independently as single-phase regulators.

It integrates remote differential sensing on all feedback pins (FB_Bx), enabling point-of-load (POL) compensation for IR drop across PCB traces. The device uses internal PLL with external clock synchronization capability (1–24 MHz input), spread-spectrum modulation, and programmable slew-rate control (0.47–15 mV/µs) to suppress EMI and limit inrush current during startup and voltage transitions.

Key Specifications

Pinout & Package

VQFN-HR (RNF) 26-pin package, 4.5 mm × 4.0 mm body size, 0.35 mm pitch, with exposed thermal pad for enhanced heat dissipation in automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP875220ERNFRQ1 and LP875250ERNFRQ1, the LP875230ERNFRQ1 uniquely balances flexibility and efficiency for mixed-workload automotive ECUs - its 2+1+1 topology avoids over-provisioning on secondary rails while maintaining lower quiescent current (57 µA in 1-phase standby) than the 3-phase variant.

Availability

LP875230ERNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital cluster applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP875230ERNFRQ1 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 ICs.

The LP8752x-Q1 product line was designed specifically for automotive SoC power delivery - integrating multiphase control, functional safety features, and robust EMC performance into a single AEC-Q100-qualified package.

FAQ

What is the maximum output current configuration supported by the LP875230ERNFRQ1?

The LP875230ERNFRQ1 supports one 2-phase output (up to 4 A) and two independent 1-phase outputs (up to 2 A each), totaling 8 A. This is achieved using its four integrated buck stages with programmable phase assignment. The actual current per rail is limited by thermal conditions, input voltage (≥3 V required for full rating), and external component selection - for example, 2.8–3 V input reduces the 2-phase rail to 6 A and each 1-phase rail to 3 A. LP875230ERNFRQ1's forward current limit is set to 14 A peak aggregate across all phases.

Does the LP875230ERNFRQ1 support remote voltage sensing for all output rails?

Yes, the LP875230ERNFRQ1 supports remote differential sensing on all four buck regulators via dedicated FB_Bx pins. For the 2-phase rail (BUCK0/BUCK1), FB_B0 serves as the positive sense and FB_B1 as the negative sense. For BUCK2 and BUCK3, FB_B2 and FB_B3 act as individual positive sense inputs, with internal ground-referenced measurement. This compensates for IR drop across PCB traces, improving DC accuracy to ±0.5% at the point-of-load - a key requirement for modern automotive SoCs. LP875230ERNFRQ1 implements this without external op-amps or resistive dividers.

How does the LP875230ERNFRQ1 handle power sequencing for multiple rails?

The LP875230ERNFRQ1 enables precise power sequencing through its three configurable EN1–EN3 pins and I²C-controlled startup/shutdown delays. Each enable pin can be assigned to control one or more buck regulators, and voltage change sequences are synchronized to these signals. Soft-start slew rates (programmable from 0.47 to 15 mV/µs) prevent overshoot, while PGOOD status bits and interrupt masking allow software-coordinated handshaking with host processors. LP875230ERNFRQ1 also supports GPIO-driven external reset assertion and load-switch control - critical for ASIL-B compliant systems.

What protection features are integrated into the LP875230ERNFRQ1?

The LP875230ERNFRQ1 integrates overvoltage protection (OVP), undervoltage lockout (UVLO), overtemperature warning and shutdown, output short-circuit and overload protection, and programmable PGOOD monitoring. Thermal warning triggers at 115–135°C (configurable), with shutdown at 140–160°C and 20°C hysteresis. OVP detects deviations >39–64 mV above nominal VOUT; UVLO monitors VANA falling below 2.5–2.7 V. All protections generate masked interrupts via nINT and status flags accessible over I²C. LP875230ERNFRQ1 also includes cycle-by-cycle current limiting (1.5–5 A programmable per phase) and negative current limiting (1.6–2.4 A) to safeguard against reverse conduction.

Can the LP875230ERNFRQ1 synchronize its switching frequency to an external clock source?

Yes, the LP875230ERNFRQ1 accepts an external clock input on the CLKIN pin, supporting frequencies from 1 MHz to 24 MHz with ±30% tolerance. Upon detection, the internal PLL locks to the external reference within 600 µs, enabling deterministic switching alignment across multiple converters to minimize beat frequencies and system-level EMI. When CLKIN is grounded, the device defaults to its internal 2 MHz oscillator. The LP875230ERNFRQ1 also supports spread-spectrum modulation even in synchronized mode, further reducing spectral peaks. This capability is essential for radar and camera systems where switching noise must avoid sensitive RF bands.