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

STMicroelectronics L9952XP

Name: L9952XP
Brand: STMicroelectronics
SKU: L9952XP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9952XP

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: PowerSSO-36 Exposed Bottom Pad

Datasheet:: L9952XP.pdf

Description:: IC PWR MANAGEMENT SYST PWRSSO36

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L9952GXP 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 op-amps for GND-return current sensing, window watchdog, fail-safe output, and cyclic contact monitoring - deployed in body control modules for door zone ECUs.

For engineers reviewing the L9952GXP datasheet, L9952GXP pinout, L9952GXP application, or L9952GXP equivalent, this device supports critical automotive power sequencing, diagnostic-driven wake-up logic, LIN-based communication, and real-time driver fault reporting via SPI status registers - essential for ISO 16750-compliant body electronics design.

Technical Context

The L9952GXP implements a multi-mode power architecture with VBAT standby (7µA) and V1 standby (45–75µA) states, enabling ultra-low-power cyclic contact monitoring of up to four wake-up inputs (WU1–WU4). Its LIN transceiver complies with SAE J2602 and supports dominant timeout, short-to-battery/ground detection, and LINPU functionality.

Operation is centrally managed via 24-bit SPI: all mode transitions (Active, Flash, V1 Standby, VBAT Standby), driver enable/disable, fault masking, and diagnostic readback are controlled through three configuration registers and two status registers - with dedicated bits for HSx_OL, Relx_OC, Vx Fail, TW, and TSD events.

Key Specifications

Parameter	Value and Actual Design Meaning
V1 Regulator	5V ±2%, 250mA continuous - powers core logic and SPI interface in active/flash modes
V2 Regulator	5V ±2%, 100mA continuous - supplies external sensors or low-power peripherals
Standby Current	VBAT stby = 7µA; V1 stby = 45µA (75µA with cyclic sense) - enables battery-sensitive always-on monitoring
High-Side Drivers	OUT1–4: R_DS(on) = 7Ω typ; Out_HS: R_DS(on) = 1Ω typ - supports LED/Hall loads and fast-switching relays
LIN Compliance	LIN 2.1 + SAE J2602 - includes short-to-GND wake-up, dominant timeout, and bus fault recovery
SPI Interface	24-bit serial peripheral interface - enables full register-level control and diagnostic readback (status reg 0/1)
Protection Features	Short-circuit protected outputs, thermal shutdown (TSD), temperature warning (TW), OV/UV detection - ensures AEC-Q100 Grade 1 robustness

Pinout & Package

Package: PowerSSO-36 (exposed pad, thermally enhanced SO package, 36-pin).

Pin/Terminal	Circuit Role	Design Meaning
V1	Main 5V regulator output	250mA supply rail for MCU core and internal logic; monitored for fail detection
V2	Secondary 5V regulator output	100mA auxiliary rail; independently controllable via SPI On_V2x bit
OUT_HS	High-current high-side driver	1Ω R_DS(on); used for critical loads requiring low-loss switching (e.g., safety indicators)
OUT1–OUT4	General-purpose high-side drivers	7Ω R_DS(on); configurable as LED/Hall drivers with overcurrent/thermal fault reporting
Rel1, Rel2	Relay driver outputs	2Ω R_DS(on); integrated flyback protection; support 12V automotive relay coils
WU1–WU4	Wake-up input pins	Configurable digital inputs with cyclic contact monitoring; trigger exit from V1/VBAT standby
LIN_TxD / LIN_RxD	LIN bus transceiver I/O	Compliant with LIN 2.1 physical layer; supports wake-up from LIN frame and short-to-GND condition
CSN / DI / DO / CLK	SPI interface signals	24-bit SPI master interface; enables full diagnostics, mode control, and register access
FSO	Fail-safe output	Open-drain output asserting on critical faults (OV, UV, TSD, watchdog timeout) - drives external safety circuitry
INT	Interrupt output	Active-low interrupt signaling driver faults, watchdog events, or wake-up detection

Key Features

Feature	Design Value
Cyclic contact monitoring	Hardware-accelerated polling of WU1–WU4 during V1 standby; eliminates MCU intervention for door handle detection
Window watchdog	Configurable open/closed timing windows with save-trigger area; prevents spurious resets during transient noise
GND-return current sensing	Two integrated op-amps with rail-to-rail input; enables precise load current measurement without shunt resistor on high side
LIN wake-up from short-to-GND	Detects LIN bus short to ground as valid wake event - supports fail-safe entry into diagnostic mode
SPI-based diagnostics	Status Register 0 reports HSx_OL, HSx_OC, Relx_OC, Vx Fail, TW, TSD; Status Register 1 adds OV, UV, LIN, Cold Start flags

Applications

Door Module Control

Roof Console ECU

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

IC Role / Device Role / Timing Role: Power management system IC providing regulated V1/V2 rails, driving LEDs/motors via OUT1–OUT4 and Rel1/Rel2, and monitoring switch contacts via WU1–WU4.

Use Value: Eliminates discrete regulators, drivers, and LIN transceivers - reduces BOM count by ≥7 components while enabling SPI-accessible fault logging per channel.

Use Scenario: Roof-mounted control unit managing sunroof, ambient lighting, and rearview mirror functions.

IC Role / Device Role / Timing Role: High-integration PMIC delivering sequenced 5V supplies, LIN communication with body domain controller, and current-sense feedback for dimmable LED zones.

Use Value: Integrated op-amps enable accurate GND-return current sensing for LED brightness calibration - no external amplifiers or precision resistors required.

Seat Control Unit

Trunk/Liftgate Module

Use Scenario: Motorized seat adjustment with position memory, heating, and occupancy detection.

IC Role / Device Role / Timing Role: Supplies MCU and sensors via V1/V2, drives seat motor relays (Rel1/Rel2), monitors Hall sensors (WU3/WU4), and reports faults over LIN.

Use Value: Out_HS (1Ω) delivers low-loss power to seat heater elements; thermal shutdown (TSD) and temperature warning (TW) prevent overheating under sustained load.

Use Scenario: Liftgate actuation and anti-pinch safety monitoring in SUVs and hatchbacks.

IC Role / Device Role / Timing Role: Controls latch solenoid (Rel1), lift motor driver (OUT_HS), and detects obstruction via current-sense op-amps monitoring GND return path.

Use Value: Real-time current sensing enables dynamic anti-pinch response without additional ADC or external shunt - meets ISO 13849 PLd requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE9263-2QX	Single 5V/250mA regulator; no V2 rail; only three high-side drivers; no integrated op-amps	Lacks dual-regulator flexibility and GND-return current sensing - unsuitable for dual-rail or analog-sensing designs	Select when only one regulated rail and minimal driver count are needed; lower pin count and cost
MC33816	Includes CAN interface instead of LIN; 3.3V/200mA + 5V/150mA regulators; no cyclic contact monitoring logic	Targets CAN-based gateway modules; lacks hardware wake-up scanning - requires MCU polling	Prefer for CAN-domain integration; avoid if LIN compliance and autonomous wake-up are mandatory

Compared with TLE9263-2QX and MC33816, the L9952GXP uniquely combines dual 5V regulation, LIN 2.1 + cyclic wake-up, integrated current-sense op-amps, and SPI-accessible diagnostics - making it optimal for cost-sensitive, LIN-connected body ECUs requiring autonomous monitoring and analog feedback.

Availability

L9952GXP is available at Aetrix Electronics and suitable for automotive body control modules, door zone ECUs, and roof console systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for L9952GXP 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 ICs, power management solutions, and embedded processing technologies - with broad AEC-Q100 qualification coverage and ISO/TS 16949 manufacturing certification.

The L9952GXP belongs to ST's automotive power system IC product line, designed specifically for intelligent body electronics requiring integrated regulation, LIN communication, driver protection, and diagnostic-rich operation in harsh vehicle environments.

FAQ

What is the maximum junction temperature and thermal shutdown threshold for the L9952GXP?

The L9952GXP specifies an operating junction temperature range of −40°C to +150°C. Thermal shutdown activates at T_J = 165°C (typ), with temperature warning (TW) asserted at 150°C (typ) - both thresholds are hardware-monitored and reported in Status Register 0 (TSDx and TW bits).

How does the cyclic contact monitoring function operate without MCU intervention?

Cyclic contact monitoring runs autonomously in V1 standby mode: the L9952GXP hardware scans WU1–WU4 at programmable intervals (via SPI control register 1, Txx bits), debounces inputs, and triggers wake-up on state change - no SPI polling or firmware execution required during monitoring.

Can the L9952GXP drive a 12V automotive relay directly, and what protection is provided?

Yes - Rel1 and Rel2 are rated for 12V coil operation with R_DS(on) = 2Ω (typ) and integrated flyback diode protection. Each relay driver includes short-circuit, overtemperature, and overvoltage fault detection, with OC status reported in Status Register 0 (Relx_OC bits) via SPI.

Is the LIN transceiver compliant with both LIN 2.1 and SAE J2602 standards?

Yes - the L9952GXP LIN interface meets LIN 2.1 specification and is explicitly certified SAE J2602 compatible per datasheet Section 2.16 and Table 22–26, including dominant timeout, short-to-battery/ground detection, and LINPU functionality for pull-up control.

L9952XP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSSO-36 Exposed Bottom Pad

Packaging:: Tube

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

L9952XP FAQ

1.How can I place an order for L9952XP through Aetrix?

Please submit a Request for Quotation (RFQ) for L9952XP 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 L9952XP reliable?

The price and inventory of L9952XP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9952XP is usually 5 days.

3.What payment methods are accepted for L9952XP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9952XP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9952XP?

L9952XP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9952XP 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 L9952XP?

For technical support, including L9952XP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9952XP requirements.

6.How does Aetrix verify that L9952XP is sourced from the original manufacturer or authorized distributors?

All L9952XP 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 L9952XP meets industry standards.

7.What is the process for return or replacement of L9952XP?

All L9952XP units undergo pre-shipment inspection (PSI). If there is an issue with L9952XP, 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 L9952XP part is unused and in its original packaging.

Return procedure for L9952XP:

1.Submit a request within 90 days.

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

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