STMicroelectronics L99MOD53XPTR

Overview

L99MOD53XPTR from STMicroelectronics is an AEC-Q100 qualified automotive multi-output driver IC integrating three half-bridges (0.75 A, R_DS(on) = 1600 mΩ), two configurable high-side drivers (1.5 A / 500 mΩ or 0.35 A / 1800 mΩ), one full bridge (6 A, R_DS(on) = 150 mΩ), and one dedicated 6 A high-side driver (R_DS(on) = 100 mΩ), used for DC motor and resistive load control in body electronics modules.

For engineers reviewing the L99MOD53XPTR datasheet, L99MOD53XPTR pinout, L99MOD53XPTR application, or L99MOD53XPTR equivalent, key selection considerations include SPI-controlled diagnostics, programmable soft-start for inrush current management, open-load/overload/over-temperature protection per channel, and dual-supply operation (VS up to 28 V, VCC 4.5–5.3 V).

Technical Context

The L99MOD53XPTR implements a microcontroller-driven actuator driver architecture with eight independently controlled outputs: OUT1–OUT3 and OUT4–OUT5 are half-bridges; OUT6–OUT7 are configurable high-side drivers; OUT8 is a fixed 6 A high-side driver. All outputs support PWM control and feature integrated current monitoring on OUT1, OUT4, OUT5, and OUT8.

It uses a serial peripheral interface (SPI) with 24-bit command words for mode configuration (forward/reverse/brake/high-Z), fault status readback, and diagnostic register access. Protection includes short-circuit, open-load, overload, thermal shutdown (T_j = 170 °C), and overvoltage/undervoltage detection on VS (UV: 5.7–6.9 V; OV: 17.5–24.5 V).

Key Specifications

Pinout & Package

Delivered in PowerSSO-36 package - thermally enhanced 36-pin exposed-pad surface-mount package with optimized copper layout for automotive thermal cycling reliability. GND (pins 1, 18, 19, 36), VS (pins 6, 7, 14, 15, 23, 25, 28, 32), and output pins are multiplexed across multiple pins to reduce impedance and improve current handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with L99MOD54XPTR, the L99MOD53XPTR offers optimal channel count for 3-motor + 3-resistive load systems without over-provisioning; versus TLE9201SG, it delivers system-level integration-reducing MCU GPIO usage, eliminating external sense circuitry, and enabling centralized fault logging via SPI.

Availability

L99MOD53XPTR is available at Aetrix Electronics and suitable for automotive body control modules, electronic parking brake systems, and adaptive lighting applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for L99MOD53XPTR 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 power management, microcontrollers, and analog ICs, with manufacturing certified to IATF 16949 and AEC-Q100 stress testing standards.

The L99MOD product line targets automotive actuator control-designed to replace discrete driver solutions in body electronics with integrated protection, diagnostics, and SPI configurability for reduced system complexity and improved functional safety.

FAQ

What is the maximum continuous current rating for OUT4 and OUT5 in full-bridge configuration?

OUT4 and OUT5 support ±10.5 A peak current per leg, with continuous operation rated at ±6 A at T_j ≤ 150 °C and VS = 13.5 V. Their 150 mΩ typical R_DS(on) ensures < 540 mW conduction loss per switch at 6 A, validated under JEDEC JESD51-2 PCB conditions with 4-layer thermal layout.

How does the programmable soft-start function operate, and which outputs support it?

The soft-start function is configured per output via SPI register bits and applies to all eight outputs (OUT1–OUT8). It introduces a controlled voltage ramp during turn-on to limit dI/dt, preventing inrush currents exceeding 6 A on high-side drivers or >1.5 A on half-bridges-critical for incandescent bulbs and large inductive loads.

Can the current monitor output (CM/PWM2) be used simultaneously for sensing and PWM injection?

No-CM/PWM2 operates in time-multiplexed mode: when configured as current monitor (default), it outputs a 1:10,000 scaled analog replica of OUT1/OUT4/OUT5/OUT8 current; when reconfigured via SPI MUX bits, it becomes a second PWM input for OUT7, disabling current monitoring on that pin during use.

Is external reverse polarity protection required, and how does the CP pin integrate with it?

Yes-external reverse polarity protection is mandatory. The CP pin delivers a boosted voltage (VS + 6 to VS + 13 V) to drive the gate of an external N-channel MOSFET placed between battery and VS input; this eliminates need for costly P-channel high-side switches while maintaining low forward voltage drop and fast response.