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

STMicroelectronics L9953XPTR

Name: L9953XPTR
Brand: STMicroelectronics
SKU: L9953XPTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9953XPTR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: PowerSSO-36 Exposed Bottom Pad

Datasheet:: L9953XPTR.pdf

Description:: IC DVR DOOR ACTUATOR POWERSSO-36

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L9953XPTR from STMicroelectronics is an automotive-grade multifunctional door actuator driver IC integrating five half-bridge outputs (OUT1–OUT5), three high-side drivers (OUT6–OUT8), SPI interface, current monitoring, and comprehensive diagnostics. It delivers 6 A peak through two full/half-bridge channels (r_ON = 150 mΩ typ at 25°C), 1.5 A through three half-bridges (r_ON = 800 mΩ), and supports PWM-controlled mirror fold, lock, defroster, and lighting loads in vehicle door modules.

For engineers reviewing the L9953XPTR datasheet, L9953XPTR pinout, L9953XPTR application, or L9953XPTR equivalent, key selection criteria include its PowerSSO-36 package thermal performance, programmable softstart for inrush-limited motor startup, integrated open-load/overload/overtemperature diagnostics via SPI, and dual-supply operation (VS: 7–28 V, VCC: 4.5–5.3 V).

Technical Context

The L9953XPTR implements a microcontroller-driven architecture with a 24-bit SPI interface enabling precise control of forward/reverse/brake/high-Z states across all eight outputs. Its diagnostic engine reports real-time fault status-including open load, overload, overtemperature (T_j shutdown at 170°C), and VS undervoltage (5.7 V) or overvoltage (18 V)-via dedicated status registers.

It integrates a charge pump (V_CP = VS + 6 to VS + 13 V) for external reverse-polarity protection MOSFET gate drive, and features bidirectional CM/PWM2 pin supporting current sensing (1/10,000 ratio) or secondary PWM input for OUT7. All outputs are protected against short-circuit and thermal runaway.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Configuration	5 half-bridges (OUT1–OUT5) + 3 high-side drivers (OUT6–OUT8); enables independent control of 3 DC motors and 3 resistive loads
Max Output Current	±10.5 A sink/source on OUT4/OUT5; ±3 A on OUT1–OUT3/OUT6–OUT8 - supports door lock, mirror axis, and defroster loads
r_ON (Typ, 25°C)	150 mΩ (OUT4/OUT5), 800 mΩ (OUT1–OUT3), 100 mΩ (OUT8), 500 mΩ (OUT6/OUT7) - determines conduction loss and thermal derating
Standby Current	<6 µA (T_j ≤ 85°C) - enables ultra-low-power sleep mode for always-on vehicle systems
SPI Interface	24-bit serial control with CSN/CLK/DI/DO; provides full configuration and real-time diagnostic readback
Diagnostic Coverage	Open-load, overload, overtemperature (130°C warning, 170°C shutdown), VS UV/OV detection - reduces need for external monitoring circuitry
Softstart Programmability	Configurable ramp time for inductive loads >6 A or >1.5 A - prevents voltage sag and contact arcing during motor startup

Pinout & Package

Package: PowerSSO-36 - thermally enhanced exposed-pad SO package with 36 leads, optimized for automotive under-hood thermal dissipation (R_thJA = 30°C/W typical).

Pin/Terminal	Circuit Role	Design Meaning
GND (Pins 1,18,19,36)	Ground reference	All four pins must be externally connected to minimize ground bounce and support full output current capability
VS (Pins 6,7,14,15,23,25,28,32)	Main power supply input	8–28 V battery rail; eight pins required for low-impedance path and thermal spreading
OUT1–OUT5 (Pins 3,4,5,16,17,20,21,24,23)	Half-bridge outputs	Each pair drives bidirectional DC motors (e.g., mirror vertical/horizontal, lock/unlock); internal DMOS with bulk-drain diodes
OUT6–OUT8 (Pins 31,33,2,35)	High-side drivers	OUT6/OUT7: 1.5 A resistive loads (mirror fold); OUT8: 6 A defroster/lighting - no GND-referenced body diode
CSN, CLK, DI, DO (Pins 10,13,8,11)	SPI interface	CMOS-level 4-wire SPI with tristate DO; enables daisy-chaining and fault reporting without MCU GPIO overhead
CM/PWM2 (Pin 9)	Bidirectional monitor/control	Current sense output (1/10,000 scaling) or secondary PWM input for OUT7 - eliminates extra signal routing
PWM1 (Pin 27)	External PWM input	Direct hardware PWM control of OUT1–OUT6 and OUT8 - bypasses SPI latency for time-critical actuation
CP (Pin 29)	Charge pump output	Drives gate of external N-MOS for reverse polarity protection - avoids need for costly discrete protection ICs

Key Features

Feature	Design Value
Integrated diagnostic engine	Real-time open-load, overload, overtemperature, and supply UV/OV detection reported via SPI status register - reduces BOM count and software validation effort
Programmable softstart	Adjustable current ramp for high-inrush loads (e.g., cold mirror motors) - prevents battery dip and relay chatter in 12 V systems
Dual-supply architecture	Independent VS (7–28 V) and VCC (4.5–5.3 V) rails - isolates logic integrity from noisy battery transients during load switching
Current monitor per critical output	1/10,000-ratio analog current sense on OUT1, OUT4, OUT5, OUT8 - enables closed-loop torque estimation without shunt resistors
Thermal robustness	Junction temperature range −40°C to +150°C with 170°C thermal shutdown and 20°C hysteresis - meets AEC-Q100 Grade 1 requirements

Applications

Door Lock Actuation

Mirror Vertical/Horizon Control

Use Scenario: Bidirectional actuation of solenoid-based door lock mechanism in OEM door modules.

IC Role / Device Role / Timing Role: Half-bridge driver (OUT1–OUT3) delivering ±3 A pulses with <40 µs turn-on delay and brake functionality via SPI command.

Use Value: Eliminates discrete H-bridge and protection components; softstart prevents mechanical shock during engagement.

Use Scenario: Precision positioning of side-view mirror glass using dual-axis DC motors.

IC Role / Device Role / Timing Role: Dual half-bridge (OUT1/OUT2 for vertical, OUT4/OUT5 for horizontal) with independent PWM control and current feedback.

Use Value: Enables stall detection and position calibration via monitored current slope - no encoder required.

Mirror Fold & Defroster

Door Lighting Control

Use Scenario: Automatic folding/unfolding of mirrors and heating element activation in cold climates.

IC Role / Device Role / Timing Role: High-side drivers OUT6/OUT7 (1.5 A fold motor) and OUT8 (6 A defroster) with open-load diagnostics and thermal shutdown.

Use Value: Single-chip solution replaces multiple discrete high-side switches; built-in overload protection prevents heater burnout.

Use Scenario: Switching of 10 W interior dome lights and puddle lamps in door panels.

IC Role / Device Role / Timing Role: High-side drivers OUT6/OUT7 (1.5 A each) controlled via PWM1 input for dimming and fade effects.

Use Value: Supports smooth LED dimming without flicker; current monitor enables end-of-life detection via rising R_DS(on).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE9201SG	Single-package 4-channel half-bridge (max 3.5 A), no integrated current monitor or charge pump	Lacks OUT8-level 6 A capability and mirror defroster support; requires external UVLO and reverse protection	Preferred for cost-sensitive 2-motor systems without defroster or lighting integration
VNQ7E100AJ	Quad high-side driver (10 A peak), no half-bridges or SPI interface - standalone protection IC	Cannot drive bidirectional motors; limited to resistive loads only; diagnostics require external MCU polling	Used as supplemental high-current stage alongside simpler motor drivers, not as full replacement

Compared with L9953XPTR, TLE9201SG offers lower channel count and no current sensing, while VNQ7E100AJ lacks motor control logic entirely - making L9953XPTR uniquely suited for integrated door module designs requiring mixed bridge/high-side topology and full diagnostic visibility.

Availability

L9953XPTR is available at Aetrix Electronics and suitable for automotive door module production, body control unit (BCU) development, and OEM Tier-1 ECU qualification requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for L9953XPTR 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 AEC-Q100-qualified portfolio.

The L9953XPTR belongs to ST's automotive smart-power family designed specifically for body electronics actuation - emphasizing integrated protection, diagnostic richness, and thermal resilience in space-constrained door modules.

FAQ

What is the maximum junction temperature and thermal shutdown behavior of the L9953XPTR?

The L9953XPTR operates from −40°C to +150°C junction temperature. Thermal shutdown activates at 170°C (rising) and releases at 150°C (falling), providing 20°C hysteresis. A temperature warning flag asserts at 130°C via SPI status register, allowing preemptive derating before shutdown.

How does the programmable softstart function work, and which outputs support it?

The softstart function applies to all eight outputs (OUT1–OUT8) and is configured via SPI register bits. It controls the slew rate of output current during turn-on, limiting inrush for high-inductance loads like cold mirror motors. The ramp time is adjustable in discrete steps to match specific load characteristics.

Can the L9953XPTR drive both resistive and inductive loads simultaneously, and how are they differentiated in the pinout?

Yes - OUT6–OUT8 are high-side-only drivers intended for resistive loads (e.g., defrosters, bulbs) and lack GND-referenced body diodes; OUT1–OUT5 are half-bridges with internal DMOS body diodes optimized for inductive motor commutation. This separation prevents shoot-through and enables safe freewheeling paths.

What is the role of the CP (charge pump) pin, and what external component is required?

The CP pin supplies a boosted voltage (VS + 6 to VS + 13 V) to drive the gate of an external N-channel MOSFET used for reverse-polarity protection. A single external N-MOS (e.g., STP16NF06L) is required between battery and VS input; no additional charge pump IC or capacitors are needed.

L9953XPTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSSO-36 Exposed Bottom Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Door Actuator

Current - Supply:: 7mA

Voltage - Supply:: 7V ~ 28V

Operating Temperature:: -40°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-36

L9953XPTR FAQ

1.How can I place an order for L9953XPTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9953XPTR 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 L9953XPTR reliable?

The price and inventory of L9953XPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9953XPTR is usually 5 days.

3.What payment methods are accepted for L9953XPTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9953XPTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9953XPTR?

L9953XPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9953XPTR 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 L9953XPTR?

For technical support, including L9953XPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9953XPTR requirements.

6.How does Aetrix verify that L9953XPTR is sourced from the original manufacturer or authorized distributors?

All L9953XPTR 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 L9953XPTR meets industry standards.

7.What is the process for return or replacement of L9953XPTR?

All L9953XPTR units undergo pre-shipment inspection (PSI). If there is an issue with L9953XPTR, 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 L9953XPTR part is unused and in its original packaging.

Return procedure for L9953XPTR:

1.Submit a request within 90 days.

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

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