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

STMicroelectronics L9952XPTR

Name: L9952XPTR
Brand: STMicroelectronics
SKU: L9952XPTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9952XPTR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: PowerSSO-36 Exposed Bottom Pad

Datasheet:: L9952XPTR.pdf

Description:: IC PWR MANAGEMENT SYST PWRSSO36

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L9952XPTR from STMicroelectronics is an automotive power management system IC integrating two 5V LDO regulators (250mA and 100mA), LIN 2.1 transceiver, 24-bit SPI interface, four 7Ω high-side drivers, one 1Ω high-side driver (Out_HS), two 2Ω relay drivers, two GND-return op-amps for current sensing, window watchdog, fail-safe output, and cyclic contact monitoring - deployed in body control modules for door zone ECUs.

For engineers reviewing the L9952XPTR datasheet, L9952XPTR pinout, L9952XPTR application, or L9952XPTR equivalent, this device supports critical automotive subsystems requiring integrated voltage regulation, LIN communication, driver diagnostics, thermal protection, and wake-up logic with Hall sensor support.

Technical Context

The L9952XPTR implements a dual-regulator architecture with independent V1 (250mA) and V2 (100mA) LDOs, each supporting distinct standby modes (V1 stby: 45µA; VBAT stby: 7µA). Its LIN transceiver complies with SAE J2602 and includes dominant timeout, short-to-battery/ground detection, and LINPU functionality.

SPI-controlled operation enables full mode configuration (Active, Flash, V1 Standby, VBAT Standby) and real-time diagnostic readback via status registers. Wake-up logic supports four dedicated inputs (WU1–WU4), INH, and LIN-triggered wake events with cyclic contact monitoring for low-power switch detection.

Key Specifications

Parameter	Value and Actual Design Meaning
V1 Regulator Output	5.0 V ±2%, 250 mA continuous - powers core ECU logic and microcontroller peripherals
V2 Regulator Output	5.0 V ±2%, 100 mA continuous - supplies sensors, LIN transceiver, and auxiliary circuits
Standby Current (VBAT)	7 µA - enables ultra-low-power battery monitoring during vehicle off-state
LIN Compliance	LIN 2.1 & SAE J2602 - ensures interoperability with automotive LIN networks without external level-shifting
High-Side Driver R_DS(on)	Out_HS: 1 Ω typ; OUT1–OUT4: 7 Ω typ - supports direct LED/Hall load driving with short-circuit protection
Relay Driver R_DS(on)	2 Ω typ per channel (Rel1, Rel2) - drives automotive relays with integrated overcurrent and thermal foldback
Operational Amplifiers	2x rail-to-rail, GND-return configuration - enables bidirectional current sensing in low-side shunt paths
Window Watchdog	Programmable open/closed window timing - prevents firmware lockup while tolerating deterministic delays

Pinout & Package

Supplied in PowerSSO-36 package: thermally enhanced exposed-pad SO-36 variant optimized for automotive under-hood thermal environments and PCB copper-area heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
V1	Main 5V regulator output	250mA LDO supply for MCU core and digital logic; monitored for undervoltage/overvoltage
V2	Auxiliary 5V regulator output	100mA LDO supply for LIN transceiver, sensors, and analog circuitry
VBAT	Battery input (4.5–28 V)	Primary power source; feeds both regulators and enables wake-up on battery transition
CSN	SPI chip select (active low)	Enables SPI communication; must be held high between transfers to avoid bus contention
CLK	SPI clock input	Supports up to 2 MHz SPI clock; synchronous edge-triggered register access
DI / DO	SPI data in / data out	Full-duplex 24-bit SPI interface for configuration, status readback, and fault logging
TXD / RXD	LIN bus transmit/receive	Differential LIN physical layer I/O compliant with ISO 17987-4; integrated pull-up and slope control
WU1–WU4	Wake-up inputs	Four dedicated digital inputs with programmable sensitivity for mechanical switch or Hall sensor monitoring
OUT_HS	High-current high-side driver	1Ω R_DS(on) output capable of 1.5A peak; protected against short-to-ground and overtemperature
OUT1–OUT4	General-purpose high-side drivers	7Ω R_DS(on) outputs rated for 350mA continuous; each independently controllable and diagnosable via SPI
Rel1 / Rel2	Relay driver outputs	2Ω R_DS(on) low-impedance drivers with integrated flyback diode control and open-load detection
FSO	Fail-safe output	Open-drain output asserting fault condition (e.g., thermal shutdown, regulator failure) to external safety controller
INT	Interrupt output	Active-low signal indicating SPI-accessible event (e.g., watchdog timeout, wake-up, driver fault)

Key Features

Feature	Design Value
Cyclic contact monitoring	Enables ultra-low-power (75µA) periodic polling of mechanical switches without MCU intervention
Integrated LIN 2.1 transceiver	Eliminates need for external LIN PHY; includes dominant timeout, short-to-battery/ground recovery, and LINPU
24-bit SPI diagnostic interface	Provides real-time readback of driver states, fault flags (OL, OC, UV, OV), temperature warnings, and watchdog status
Thermal warning & shutdown	Two-stage protection: warning flag at 150°C, hard shutdown at 175°C junction temperature
Independent regulator standby modes	V1 standby (45µA) and VBAT standby (7µA) allow selective power gating for optimal system-level sleep current
GND-return current sense amplifiers	Two op-amps configured for low-side shunt measurement - avoids high-side sensing complexity and cost

Applications

Door Module Control

Seat Positioning System

Use Scenario: Centralized control of power windows, locks, mirrors, and interior lighting in vehicle door assemblies.

IC Role / Device Role / Timing Role: Primary power manager and driver hub - regulates 5V rails, drives LEDs/motors via HS outputs, monitors switches via WU inputs, communicates via LIN.

Use Value: Reduces BOM count by integrating regulators, LIN PHY, drivers, and diagnostics - simplifies PCB layout and improves ASIL-B readiness through watchdog and fault reporting.

Use Scenario: Motorized seat adjustment with position feedback, memory recall, and occupant detection.

IC Role / Device Role / Timing Role: Supplies regulated 5V to seat MCU and Hall sensors; drives motor H-bridge enable lines and status LEDs; monitors seat switch inputs via cyclic wake-up.

Use Value: Enables <10µA system standby current via VBAT stby mode while maintaining switch responsiveness - extends battery life in parked vehicles.

Roof Module (Sunroof/Blind)

Body Control Gateway

Use Scenario: Sunroof motor control, rain sensor interface, and ambient light-driven blind actuation.

IC Role / Device Role / Timing Role: Powers sunroof MCU and analog sensors; drives motor enable and limit switch interfaces; provides LIN connectivity to main BCM.

Use Value: Integrated op-amps enable precise current monitoring of sunroof motor - detects stall/jam conditions before mechanical damage occurs.

Use Scenario: Central gateway managing LIN subnetworks for lighting, HVAC, and convenience functions.

IC Role / Device Role / Timing Role: Acts as LIN master node with configurable baud rate and error handling; routes commands between CAN and LIN domains using SPI-connected host MCU.

Use Value: Window watchdog and fail-safe output ensure deterministic response to software faults - meets functional safety requirements for Class C gateway applications.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NCV8853BDR2G	Single 5V/350mA regulator + LIN transceiver only; no high-side drivers or SPI diagnostics	Lacks integrated drivers and current-sense amps - requires external FETs and op-amps for comparable functionality	Select when only basic LIN node regulation is needed and board space permits discrete driver implementation
TLE9263-2QX	Three 5V regulators (200/150/100mA), 6x HS drivers (1.2Ω), embedded watchdog, but no cyclic contact monitoring or LINPHY	Requires external LIN transceiver; superior driver count and current capability, but missing LIN integration and ultra-low-power wake logic	Prefer for high-channel-count body nodes where LIN is handled separately and higher drive strength is critical

Compared with NCV8853BDR2G, L9952XPTR delivers full system integration (drivers, diagnostics, wake logic); versus TLE9263-2QX, it trades driver count for LIN compliance and sub-10µA standby - making it optimal for LIN-attached zone controllers with tight power budgets.

Availability

L9952XPTR is available at Aetrix Electronics and suitable for automotive body control modules, door zone ECUs, and roof module designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for L9952XPTR 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 expertise and broad automotive ecosystem support.

The L9952XPTR belongs to ST's automotive power system IC product line, engineered specifically for distributed body electronics requiring integrated regulation, communication, and intelligent load driving in harsh automotive environments.

FAQ

What is the maximum junction temperature and thermal shutdown threshold?

The L9952XPTR features two-stage thermal protection: a temperature warning flag asserts at 150°C junction temperature, and hard thermal shutdown activates at 175°C. The PowerSSO-36 package supports up to 150°C ambient operation with adequate PCB copper area (≥200 mm² per regulator pad), and thermal resistance θ_JA is 35°C/W under standard JEDEC conditions.

How does the cyclic contact monitoring function reduce system standby current?

Cyclic contact monitoring operates autonomously in VBAT standby mode (75µA total), periodically waking internal logic to sample WU1–WU4 inputs without MCU involvement. This eliminates the need for external wake-up controllers or constant polling, enabling <10µA total system standby current when combined with MCU deep-sleep modes.

Can the L9952XPTR drive a 12V automotive relay directly?

Yes - the two dedicated relay drivers (Rel1, Rel2) each deliver 2Ω typical R_DS(on) into 12V loads, supporting up to 600mA continuous current with integrated open-load detection, short-circuit protection, and thermal foldback. No external flyback diode is required, as internal clamp circuitry handles inductive kickback.

Is SPI communication compatible with standard 3.3V microcontrollers?

Yes - all SPI pins (CSN, CLK, DI, DO) are 5V-tolerant and operate at V1 (5V) logic levels, but accept 3.3V-compatible input thresholds. The DO output is 5V CMOS, so a level shifter is required only if the host MCU lacks 5V-tolerant inputs; most automotive MCUs (e.g., SPC5, RH850) support direct interfacing.

L9952XPTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSSO-36 Exposed Bottom Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: -

Current - Supply:: -

Voltage - Supply:: 6V ~ 18V

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-36

L9952XPTR FAQ

1.How can I place an order for L9952XPTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9952XPTR 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 L9952XPTR reliable?

The price and inventory of L9952XPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9952XPTR is usually 5 days.

3.What payment methods are accepted for L9952XPTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9952XPTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9952XPTR?

L9952XPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9952XPTR 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 L9952XPTR?

For technical support, including L9952XPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9952XPTR requirements.

6.How does Aetrix verify that L9952XPTR is sourced from the original manufacturer or authorized distributors?

All L9952XPTR 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 L9952XPTR meets industry standards.

7.What is the process for return or replacement of L9952XPTR?

All L9952XPTR units undergo pre-shipment inspection (PSI). If there is an issue with L9952XPTR, 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 L9952XPTR part is unused and in its original packaging.

Return procedure for L9952XPTR:

1.Submit a request within 90 days.

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

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