STMicroelectronics L9300TD80T

Overview

L9300TD80T from STMicroelectronics is an AEC-Q100 qualified automotive power management and valve driver IC for transmission and braking systems. It integrates four voltage regulators (5 V/6.5 V buck, 5 V linear/tracking, two selectable-output linear), four tracking regulators configurable as wheel speed sensor interfaces, six current-controlled LS/HS drivers with ±8 mA accuracy in 0–0.5 A range, two high-side NFET pre-drivers, a CAN transceiver, dual watchdogs, and a 32-bit SPI interface. It operates across –40 °C to 175 °C junction temperature.

For engineers reviewing the L9300TD80T datasheet, L9300TD80T pinout, L9300TD80T application, or L9300TD80T equivalent, key selection considerations include its 6-channel current control accuracy across multiple ranges, TRK pin reconfigurability for wheel speed sensing, integrated CAN physical layer, dual watchdog architecture (hardware + software Q&A), and TQFP80 exposed-pad-down package thermal performance.

Technical Context

The L9300TD80T implements a multi-domain power architecture: VDD1 is a synchronous buck regulator delivering 5 V or 6.5 V at ±3% accuracy; VDD2 operates as either a ±20 mV tracking regulator or 5 V ±2% linear regulator; VDD3/VDD4 are external-pass-transistor linear regulators with ±2% accuracy and programmable output via voltage dividers. Four TRK outputs track the TRK_SEL pin voltage with ±20 mV error and support alternate configuration as differential wheel speed interfaces.

All six current-controlled drivers support both low-side and high-side operation with active freewheeling, 11-bit current set-point resolution, programmable slew rate, and dither function. Two dedicated high-side pre-drivers include one capable of PWM operation up to ~18 kHz. The integrated CAN transceiver complies with ISO 11898-2 and supports wake-up via bus activity.

Key Specifications

Pinout & Package

TQFP80 EP (14 × 14 mm, exposed pad down) provides low thermal resistance (R_THj-c = 0.66–0.9 °C/W) for high-power dissipation in automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC33816 and ISL78225, the L9300TD80T uniquely combines configurable buck/linear regulation, TRK-based wheel speed sensing, integrated CAN, and six-channel current control in one AEC-Q100 package - making it optimal for consolidated transmission and brake ECU designs requiring minimal external components and maximum functional safety coverage.

Availability

L9300TD80T is available at Aetrix Electronics and suitable for automatic transmission control units, electro-hydraulic brake modules, four-wheel drive transfer case controllers, and electric power steering support circuits requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for L9300TD80T 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-grade analog, power, and microcontroller solutions with deep expertise in BCD process technologies for high-voltage, high-temperature reliability.

The L9300 belongs to ST's U-chip family of flexible automotive power management ICs, designed specifically for transmission, braking, and chassis control applications requiring integrated regulation, precision current driving, and robust communication interfaces.

FAQ

What is the purpose of the CONFIG pin on the L9300TD80T?

The CONFIG pin selects between two power modes at power-up: grounded configures reduced standby current (5–45 µA) with CAN wake-up and Q&A watchdog disabled; pulled high enables full functionality including CAN activity during standby and both watchdog types. Its state is latched and cannot be changed without power cycle.

How does the L9300TD80T handle battery voltage transients up to 40 V?

The device withstands 40 V transients on VBATP, VCP, and VC2/VC4 pins per absolute maximum ratings. Internal protection includes reverse-battery diode drop compensation, charge-pump isolation, and regulator soft-start sequencing. During >27 V high-voltage operation, solenoid channels and pre-drivers are automatically disabled to limit power dissipation while maintaining CAN and SPI functionality.

Can the TRK pins be used simultaneously as tracking regulators and wheel speed sensor inputs?

No - TRK1–TRK4 are multiplexed functions. When configured as tracking regulators, they output voltage referenced to TRK_SEL; when configured as wheel speed interfaces, they accept differential signals from passive magnetic sensors and provide internal hysteresis and filtering. Configuration is done via SPI register WSI_CONF, and mode selection is mutually exclusive per channel.

What thermal management features support operation at 175 °C junction temperature?

The L9300TD80T includes on-die temperature sensor with SPI-readout, thermal shutdown (OTP) protection triggered at 175 °C, and thermal resistance optimized via exposed pad down (R_THj-c = 0.66–0.9 °C/W). Its BCD8s_auto process ensures stable electrical parameters across full temperature range, and current accuracy specs are guaranteed up to 175 °C without derating.