STMicroelectronics L99PM72PXPTR

Overview

L99PM72PXP from STMicroelectronics is an automotive power management system IC integrating dual 5 V regulators, LIN 2.1 and high-speed CAN transceivers (ISO 11898-2/-5/-6 compliant), five protected high-side drivers, two low-side drivers, two rail-to-rail op-amps, and ST SPI 3.0 interface - deployed in door zone and body control modules for enhanced standby efficiency and partial networking.

For engineers reviewing the L99PM72PXP datasheet, L99PM72PXP pinout, L99PM72PXP application, or L99PM72PXP equivalent, this device supports critical automotive ECU functions including programmable reset generation, configurable window watchdog, thermal shutdown, cyclic contact monitoring, and selective wake-up via LIN/CAN bus events.

Technical Context

The L99PM72PXP implements a multi-domain power architecture with two independent LDO regulators (V1: 5 V/150 mA; V2: 5 V/300 mA), each supporting ultra-low quiescent current (<30 µA) in V1_standby and VBat_standby modes. Its CAN transceiver enables Partial Networking via ISO 11898-6 selective wake-up, while LIN compliance meets SAE J2602 requirements with integrated pull-up and error-handling diagnostics.

System-level control is executed through ST SPI 3.0, enabling full register access to 16 configuration registers and 5 status registers for real-time diagnosis of high-side outputs, temperature warnings, supply faults, and communication layer errors - all coordinated under fail-safe logic that forces VBat_standby on multiple detected failures.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE9263-3ES and UCD3138RGCT, the L99PM72PXP uniquely combines dual regulated supplies, LIN+CAN transceivers with partial networking, 5 HSDs, 2 LSDs, and 2 op-amps in one PowerSSO-36 package - making it the only solution meeting full door/BCM integration requirements without external support components.

Availability

L99PM72PXP is available at Aetrix Electronics and suitable for automotive door zone modules, body control units, and smart junction boxes requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for L99PM72PXP 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 AEC-Q100 qualified products.

The L99PM72PXP belongs to ST's Automotive Power Management IC family, designed specifically for intelligent body electronics ECUs requiring integrated power regulation, communication interfaces, and protected driver outputs in compact packages.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The L99PM72PXP has a maximum operating junction temperature of 150 °C, with thermal shutdown activated at 175 °C. The device includes a temperature warning flag triggered at 150 °C, allowing firmware to initiate derating or safe state transitions before shutdown occurs. Thermal data confirms R_thJA = 35 °C/W for standard PCB layout with exposed pad soldered.

Does the L99PM72PXP support CAN FD or only classical CAN?

The L99PM72PXP supports only classical high-speed CAN (up to 1 Mbps) per ISO 11898-2/-5 and SAE J2284. It does not implement CAN FD protocol features such as variable bit rate or extended data length. Its CAN transceiver is explicitly designed for Partial Networking (ISO 11898-6) in legacy CAN networks used in body electronics.

How is the LIN pull-up resistor controlled?

The LIN pull-up is managed internally via the LINPU pin: when driven high, it enables an integrated ~30 kΩ pull-up to V1; when low or floating, the pull-up is disabled. This allows software-controlled activation/deactivation of the LIN bus termination - essential for multi-node LIN configurations and diagnostic modes where pull-up conflicts must be avoided.

Can the two operational amplifiers be used for current sensing?

Yes - both op-amps feature rail-to-rail outputs referenced to VS and low-voltage inputs compatible with shunt-based current sensing. With ±15 mV input offset and 10 V/µs slew rate, they support accurate bidirectional current measurement across shunts down to 10 mΩ, provided external gain resistors are added per application circuit requirements.