STMicroelectronics L9300TU80T-TR

Overview

L9300TU80T-TR 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 linear), four tracking regulators usable 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, CAN transceiver, dual watchdogs, and 32-bit SPI interface - all in a TQFP80 EP (14×14 mm) package.

For engineers reviewing the L9300TU80T-TR datasheet, L9300TU80T-TR pinout, L9300TU80T-TR application in transmission control or brake actuation, or L9300TU80T-TR equivalent for solenoid driver integration, this page delivers verified regulator configurations, driver current accuracy specs, TRK pin functional mapping, and CAN interface timing constraints directly applicable to ECU hardware design and validation.

Technical Context

The L9300TU80T-TR implements a multi-domain BCD8s_auto power architecture: its VDD1 buck regulator delivers 5 V or 6.5 V at ±3% accuracy with internal N-ch FET; VDD2 operates as either ±20 mV tracking or ±2% 5 V linear regulator (200 mA max); VDD3/VDD4 are external-pass-transistor linear regulators with ±2% accuracy and voltage selection via external dividers. Four TRK pins (TRK1–TRK4) provide ±20 mV tracking referenced to TRK_SEL and double as configurable wheel speed sensor interfaces.

Six current-controlled drivers support LS/HS operation with active freewheeling, 11-bit current set-point resolution, programmable slew rate, and dither function. Two high-side pre-drivers include one PWM-capable up to ~18 kHz. Integrated charge pump enables gate drive under low-battery conditions, while dual watchdogs (hardware + software Query/Answer) ensure CPU supervision in safety-critical applications.

Key Specifications

Pinout & Package

TQFP80 EP (14 × 14 mm, exposed pad down), RoHS-compliant, thermally enhanced for automotive under-hood mounting. Exposed pad electrically connected to GND for optimal thermal dissipation (R_THj-c = 0.66–0.9 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20096ATG+T and TPS65381A-Q1, the L9300TU80T-TR uniquely integrates CAN transceiver, four ±20 mV tracking regulators usable as wheel speed interfaces, and AEC-Q100 Grade 0 thermal rating - making it the only single-chip solution for transmission ECUs requiring co-located solenoid drive, sensor interface, and vehicle bus connectivity.

Availability

L9300TU80T-TR is available at Aetrix Electronics and suitable for automatic transmission control, electro-hydraulic brake actuation, and wheel speed sensing applications requiring stable component supply across automotive production lifecycles.

Supply support for L9300TU80T-TR 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 headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 validation infrastructure.

The L9300 series belongs to ST's automotive U-chip portfolio designed specifically for flexible, high-integration power and driver solutions in braking and transmission ECUs - emphasizing functional safety, thermal robustness, and mixed-signal configurability.

FAQ

What is the maximum continuous current per VSx driver channel?

Each VSx driver supports up to 2 A continuous current in the extended range (0.5–2 A), with ±4% accuracy. The R_DS(on) is guaranteed ≤500 mΩ at 175 °C junction temperature, enabling direct drive of typical transmission solenoids without external heatsinking under sustained duty cycles.

How does the TRK_SEL pin configure all four TRK regulators?

TRK_SEL sets the common reference voltage for TRK1–TRK4. Each TRK output tracks this voltage with ±20 mV error. When configured as wheel speed interfaces, TRK pins accept differential sensor signals and internally generate zero-crossing pulses reported via SPI status registers - no external comparator or hysteresis resistor required.

Can the L9300TU80T-TR operate during cold-crank conditions?

Yes. With VBATP as low as 5.5 V and integrated charge pump, the device maintains full functionality including VDD1 regulation, driver operation, and CAN communication. The charge pump ensures sufficient gate drive for high-side NFET pre-drivers even at 6 V battery, critical for valve hold during engine cranking.

Is the CAN transceiver galvanically isolated?

No. The integrated CAN transceiver is non-isolated and shares the same ground domain (GND/GND_A) as the rest of the IC. External isolation (e.g., capacitive or transformer-based) must be implemented at the board level if required by system architecture or EMC specifications.