STMicroelectronics L99MOD50XPTR

Overview

L99MOD50XPTR from STMicroelectronics is an AEC-Q100 qualified automotive multi-output driver IC integrating six half-bridge drivers (up to 10 A peak), five high-side drivers (up to 6 A), ST-SPI 3.0 interface, open-load and over-current diagnostics, and programmable soft-start. It drives up to five DC motors and five grounded resistive loads in body control modules, seat actuators, and HVAC damper systems.

For engineers reviewing the L99MOD50XPTR datasheet, L99MOD50XPTR pinout, L99MOD50XPTR application, or L99MOD50XPTR equivalent, key selection criteria include output current capability per channel (10 A/6 A/1.5 A configurable), R_DS(on) values (90–1600 mΩ), SPI-controlled diagnostics, thermal warning (130 °C), and standby current (<6 μA).

Technical Context

The device implements a microcontroller-driven actuator driver architecture with dual power domains (VS for power outputs, VCC for logic), integrated charge pump for reverse-polarity protection, and ST-SPI 3.0 for full register-level control of forward/reverse/brake/hi-Z states. All 11 outputs support PWM control and real-time diagnostic readback via SPI status registers.

Each output features independent protection: over-current shutdown with auto-recovery, open-load detection, and temperature monitoring with warning (130 °C) and thermal shutdown (170 °C). The current monitor output (CM/PWM2) provides scalable 1:10,000 or 1:2,000 current-sense ratio for high-side drivers OUT1–OUT11.

Key Specifications

Pinout & Package

Package: PowerSSO-36 (exposed thermal pad, RoHS-compliant, ECOPACK®2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-output automotive driver applications.

Compared with L99MOD51XPTR, the L99MOD50XPTR omits watchdog functionality but retains identical motor-driving performance and diagnostic granularity; versus TLE9201SG, it delivers integrated half-bridge control and current sensing-critical for closed-loop actuator systems.

Availability

L99MOD50XPTR is available at Aetrix Electronics and suitable for body control modules, seat actuation systems, HVAC damper control, and adaptive headlight leveling requiring stable component supply across automotive production lifecycles.

Supply support for L99MOD50XPTR 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 AEC-Q100 qualification rigor and ISO/TS 16949 manufacturing compliance.

The L99MOD product line targets automotive body electronics, delivering integrated multi-output drivers that replace discrete MOSFETs, gate drivers, and protection circuitry in space-constrained ECUs.

FAQ

What is the maximum continuous current rating for OUT4 and OUT5?

OUT4 and OUT5 are half-bridge outputs rated for ±10 A continuous current per channel under thermal limits (T_j ≤ 150 °C), with R_DS(on) = 150 mΩ (high-side) and 150 mΩ (low-side) at T_j = 25 °C. Derating applies above 85 °C ambient per Figure 13 in DS12615 Rev 4.

Does L99MOD50XPTR support daisy-chained SPI communication?

Yes - the DO (pin 11) output is tri-state and compatible with daisy-chaining: DO of one device connects to DI (pin 8) of the next. Chip select (CSN) remains individual per device, enabling broadcast writes and sequential reads without additional logic.

How does the programmable soft-start function operate?

The soft-start is configured via Control Register 2 (bit 7–4) to set current-limit thresholds from 1× to 4× nominal output current. It ramps gate drive slew rate during turn-on to limit inrush into inductive loads like motors, preventing voltage droop and false over-current trips.

Can all 11 outputs be driven simultaneously at full rated current?

No - simultaneous full-current operation is thermally limited. With all outputs active at 10 A, junction temperature exceeds 150 °C even on a 4-layer PCB with 100 cm² copper. Derating to ≤6 A per high-current output or staggered activation is required for sustained operation.