Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics L9954LXPTR

Name: L9954LXPTR
Brand: STMicroelectronics
SKU: L9954LXPTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: L9954LXPTR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: 36-PowerBFSOP (0.295", 7.50mm Width)

Datasheet:: L9954LXPTR.pdf

Description:: IC PTS SMARTPOWER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,589

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

L9954LXPTR from STMicroelectronics is an automotive-grade multifunctional door actuator driver IC integrating three half-bridge outputs (R_DS(on) = 1600 mΩ, ±0.75 A), two configurable high-side drivers (500 mΩ/1.5 A or 1800 mΩ/0.35 A), and one 6 A high-side driver (R_DS(on) = 100 mΩ), all SPI-controlled with current monitoring, open-load/overload diagnostics, and programmable soft-start for mirror axis control and defroster/LED loads.

For engineers reviewing the L9954LXPTR datasheet, L9954LXPTR pinout, L9954LXPTR application, or L9954LXPTR equivalent, this device supports precise PWM-controlled bidirectional motor driving, resistive load switching with reverse-polarity protection via charge pump, and real-time fault reporting through SPI status registers in automotive door module designs.

Technical Context

The L9954LXPTR implements a dual-supply architecture (VS: 7–28 V, VCC: 4.5–5.3 V) with integrated charge pump (VCP = VS + 10 to VS + 13 V) enabling external N-MOS reverse polarity protection. Its six output channels-OUT1–OUT3 (half-bridges), OUT4/OUT5 (configurable high-side), and OUT6 (6 A high-side)-are individually protected against overtemperature (T_j shutdown at 170 °C), short-circuit, open-load, and overload conditions.

SPI interface (24-bit command word, CSN/CLK/DI/DO) enables full configuration of forward/reverse/brake/high-Z states and real-time readback of diagnostic flags including thermal warning (130 °C), UV/OV detection (VSUV = 5.7–7.2 V, VSOV = 17.5–24.5 V), and current monitor scaling (1:10000 for OUT6, 1:3800–1:10200 for OUT4/OUT5 depending on R_DS(on) mode).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Configuration	Three half-bridges (OUT1–OUT3), two configurable high-side (OUT4/OUT5), one 6 A high-side (OUT6)
R_DS(on) (OUT1–OUT3)	1600 mΩ typ @ 25 °C - limits conduction loss for 0.75 A DC motor drive
R_DS(on) (OUT4/OUT5)	500 mΩ low-R mode or 1800 mΩ high-R mode - selectable per load current requirement
R_DS(on) (OUT6)	100 mΩ typ @ 25 °C - enables 6 A continuous resistive load switching (e.g., mirror defroster)
Standby Current	< 6 µA typ @ T_j ≤ 85 °C - meets automotive low-power sleep mode requirements
Diagnostic Coverage	Open-load, overload, overtemperature, short-circuit, UV/OV detection - reported via SPI status register
Current Monitor Accuracy	±4% + 1%FS for OUT6, ±8% + 2%FS for OUT1/OUT4–OUT5 - supports closed-loop current sensing
Soft-Start Programmability	Configurable ramp time for inrush current limiting - prevents voltage droop during incandescent bulb or motor startup

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
OUT1–OUT3 (Pins 2, 3, 4)	Half-bridge outputs	Internally connected HS/LS DMOS stages for bidirectional DC motor control; each includes bulk-drain diodes for freewheeling
OUT4/OUT5 (Pins 31, 33)	Configurable high-side drivers	Power DMOS outputs for resistive loads (e.g., 10 W bulbs); no internal GND-referenced diode - external flyback required
OUT6 (Pins 1, 34)	6 A high-side driver	Dual-pin connection for low-inductance 6 A switching; parasitic bulk-drain diode to VS provides limited reverse recovery path
VS (Pins 6, 14, 15, 16, 17, 21, 22, 28, 29, 30)	Main power supply input	10-pin parallel connection required to sustain full output current; ceramic decoupling mandatory near GND
GND (Pins 18, 19, 20, 23, 24, 36)	Ground reference	All six GND pins must be externally tied to minimize ground bounce and ensure accurate current sensing
DI / DO / CSN / CLK (Pins 5, 8, 10, 13)	SPI interface	CMOS-level serial interface supporting 24-bit command/status transfer; DO is 3-state when CSN high
CM/PWM2 (Pin 9)	Bidirectional current monitor / PWM input	Provides scaled current image (1:10000) for OUT6 or accepts external PWM signal for OUT5 control
PWM1 (Pin 27)	External PWM input	Direct hardware PWM control for OUT1–OUT4 and OUT6, bypassing SPI for timing-critical actuation
CP (Pin 26)	Charge pump output	Drives gate of external N-MOSFET for reverse-polarity protection; output voltage tracks VS + 10–13 V

Key Features

Feature	Design Value
Programmable soft-start	Adjustable ramp time prevents inrush-induced voltage sag during startup of incandescent bulbs or high-L motors
Multi-level R_DS(on) selection	OUT4/OUT5 support dual conduction modes - low-R for 1.5 A lighting, high-R for 0.35 A indicator LEDs
Integrated current monitor	Hardware-scaled analog output (CM/PWM2) enables real-time current feedback without external shunt amplifiers
Comprehensive diagnostics	Per-output open-load, overload, and overtemperature detection reported via dedicated SPI status bits
Reverse polarity protection support	On-chip charge pump (CP) drives external N-MOSFET gate - eliminates need for discrete charge pump IC
Low standby consumption	< 6 µA quiescent current ensures compliance with automotive ISO 16750-2 sleep-mode leakage limits

Applications

Automotive Door Mirror Control

Door Lock / Folder Actuation

Use Scenario: Bidirectional positioning of side-view mirror vertical/horizontal axes using two DC motors.

IC Role / Device Role / Timing Role: Half-bridges OUT1–OUT3 provide H-bridge drive with cross-current protection and PWM-controlled speed regulation.

Use Value: Integrated soft-start prevents mechanical jerk during direction reversal; diagnostic flags enable ECU fault logging without additional sensors.

Use Scenario: Driving solenoid-based door lock mechanism and folder (e.g., fuel cap or tailgate) actuator.

IC Role / Device Role / Timing Role: High-side drivers OUT4/OUT5 deliver 1.5 A (low-R mode) to solenoids with open-load detection confirming mechanical engagement.

Use Value: Configurable R_DS(on) allows same IC to drive both high-current locks and low-current position indicators.

Mirror Defroster Switching

Door Interior Lighting

Use Scenario: On/off control of 6 A resistive mirror heating element powered from vehicle battery.

IC Role / Device Role / Timing Role: OUT6 high-side driver switches 6 A load with 100 mΩ R_DS(on), supported by thermal shutdown (170 °C) and current monitor feedback.

Use Value: Single-pin current monitor (CM/PWM2) enables closed-loop temperature compensation via microcontroller software.

Use Scenario: Dimmable control of 10 W LED or incandescent bulbs in door panel illumination circuits.

IC Role / Device Role / Timing Role: OUT4/OUT5 operate in high-R mode (1800 mΩ) for 0.35 A LED strings; PWM1 input enables analog dimming without SPI overhead.

Use Value: Programmable soft-start eliminates visible flicker during bulb turn-on; overload detection prevents thermal runaway in LED arrays.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive door actuator driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BD37020FV	Single-package 4-channel high-side driver (no half-bridges); max 1.2 A per channel; no integrated current monitor	Lacks bidirectional motor control capability - suitable only for resistive loads like defrosters or lamps	Select when only unidirectional switching is needed and system already includes separate H-bridge ICs
VNQ5E050K-E	Quad-channel high-side driver with 5 A rating per channel; no half-bridges or SPI interface; analog current sense only	No diagnostic reporting or programmable soft-start; requires external MCU GPIOs for control instead of SPI	Choose for cost-sensitive designs where SPI communication and advanced diagnostics are not required

Compared with BD37020FV and VNQ5E050K-E, the L9954LXPTR uniquely integrates half-bridge motor control, configurable high-side drivers, SPI diagnostics, and current monitoring in one package - eliminating board space and BOM count for multi-function door modules.

Availability

L9954LXPTR is available at Aetrix Electronics and suitable for automotive door module development, OEM body control unit (BCU) production, and Tier-1 supplier reference designs requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.

Supply support for L9954LXPTR 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 broad manufacturing scale and AEC-Q100 validation infrastructure.

The L9954LXPTR belongs to ST's automotive smart-power family designed specifically for body electronics actuation - emphasizing integration of motor control, diagnostics, and robustness in harsh automotive environments.

FAQ

What is the maximum continuous current rating for OUT6?

OUT6 supports 6 A continuous current with R_DS(on) = 100 mΩ typ at 25 °C. Absolute maximum pulsed current is ±10 A per Table 3, but sustained operation above 6 A requires derating based on junction temperature (T_j ≤ 150 °C) and PCB copper area per Figure 10 thermal data.

How does the programmable soft-start function work?

The soft-start is configured via SPI register bits controlling internal slew-rate limiting on OUT1–OUT6. It extends turn-on time to limit inrush current during cold filament or motor coil energization - critical for preventing VS droop below 5.7 V UV threshold during startup of 10 W bulbs or mirror motors.

Can OUT4 and OUT5 be used simultaneously in different R_DS(on) modes?

No - OUT4 and OUT5 share the same configuration register for R_DS(on) mode selection. Both must operate in either low-R (500 mΩ/1.5 A) or high-R (1800 mΩ/0.35 A) mode simultaneously; independent mode control is not supported per Section 2.4 and Table 11.

Is external reverse polarity protection required when using the CP pin?

Yes - the CP pin drives the gate of an external N-channel MOSFET (e.g., STB11NK60Z) placed between battery and VS input. The L9954LXPTR provides the gate drive voltage (VS + 10–13 V) but does not include the MOSFET; external FET and gate resistor are mandatory for reverse-polarity protection.

L9954LXPTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBFSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: -

Current - Supply:: 4µA

Voltage - Supply:: 7V ~ 28V

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-36 EPD

L9954LXPTR FAQ

1.How can I place an order for L9954LXPTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9954LXPTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L9954LXPTR reliable?

The price and inventory of L9954LXPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9954LXPTR is usually 5 days.

3.What payment methods are accepted for L9954LXPTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9954LXPTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9954LXPTR?

L9954LXPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9954LXPTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L9954LXPTR?

For technical support, including L9954LXPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9954LXPTR requirements.

6.How does Aetrix verify that L9954LXPTR is sourced from the original manufacturer or authorized distributors?

All L9954LXPTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L9954LXPTR meets industry standards.

7.What is the process for return or replacement of L9954LXPTR?

All L9954LXPTR units undergo pre-shipment inspection (PSI). If there is an issue with L9954LXPTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L9954LXPTR part is unused and in its original packaging.

Return procedure for L9954LXPTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…