STMicroelectronics L9952GXPTR

Overview

L9952GXP from STMicroelectronics is an automotive power management system IC integrating two 5V LDO regulators (250mA and 100mA), LIN 2.1 transceiver, 24-bit SPI interface, four 7Ω high-side drivers, one 1Ω high-side driver (Out_HS), two 2Ω relay drivers, two GND-return op-amps, window watchdog, fail-safe output, and cyclic contact monitoring - deployed in body control modules for door zone ECUs.

For engineers reviewing the L9952GXP datasheet, L9952GXP pinout, L9952GXP application, or L9952GXP equivalent, this page delivers verified functional identity, validated PowerSSO-36 pin mapping, confirmed automotive-grade protection features (short-circuit, thermal shutdown, UV/OV detection), and real-world diagnostic capabilities including SPI-controlled driver status reporting and LIN wake-up support.

Technical Context

The L9952GXP implements a multi-mode power architecture with five defined operating states: Active, Flash, V1 Standby, VBAT Standby, and Cyclic Sense - each governed by dedicated enable logic and current consumption profiles (e.g., 7µA VBAT stby, 45µA V1 stby). Wake-up events include LIN bus activity, digital inputs (WU1–WU4), INH signal, and cyclic contact monitoring.

Its integrated LIN transceiver complies with LIN 2.1 and SAE J2602, supporting dominant timeout, short-to-battery/ground fault detection, and automatic wake-up from LIN frames. The 24-bit SPI interface enables full configuration of all drivers, diagnostics, watchdog windows, and mode transitions via eight control/status registers.

Key Specifications

Pinout & Package

Package: PowerSSO-36 (exposed thermal pad, RoHS-compliant ECOPACK®).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive power management applications.

Compared with TLE9262-2QX and MC33816AER2, the L9952GXP uniquely combines dual 5V regulation, LIN compliance, integrated relay drivers, and cyclic contact monitoring - making it optimal for cost-sensitive, LIN-based body electronics where mechanical switch integration and load diversity are critical.

Availability

L9952GXPTR is available at Aetrix Electronics and suitable for automotive door modules, body control units, and smart junction boxes requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for L9952GXPTR 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

STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power management ICs, with broad portfolio coverage and ISO/TS 16949-certified manufacturing.

The L9952GXP belongs to ST's automotive power system basis chip (SBC) product line, engineered specifically for body electronics ECUs requiring integrated regulation, communication, and intelligent load switching in harsh automotive environments.

FAQ

What automotive qualification does the L9952GXPTR meet?

The L9952GXPTR is qualified to AEC-Q100 Grade 1 (−40°C to +125°C ambient), with full characterization across temperature, voltage, and lifetime stress tests per automotive reliability standards. It includes built-in thermal shutdown, overvoltage protection up to 36 V, and robust ESD immunity (±2 kV HBM).

How does the cyclic contact monitoring function operate?

Cyclic contact monitoring uses internal timing circuitry to periodically sample WU1–WU4 pins at configurable intervals (e.g., 100 ms cycles) while in V1 standby mode, detecting switch closures without waking the host MCU. Each input supports programmable debounce and edge-triggered interrupt generation.

Can the L9952GXPTR drive automotive relays directly?

Yes - the two dedicated relay drivers (Rel1, Rel2) feature 2 Ω typical R_DS(on), rated for continuous 500 mA and peak 1.2 A, with integrated thermal foldback and short-circuit protection. They eliminate external driver transistors for standard 12 V automotive relays.

Is SPI communication compatible with standard microcontrollers?

Yes - the 24-bit SPI interface uses standard CMOS-level CSN, CLK, DI, and DO signals with configurable polarity and phase. Timing meets common MCU SPI peripheral requirements (e.g., STM32, NXP S32K), and register maps are fully documented for seamless firmware integration.