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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

STMicroelectronics L9375TRLF

Name: L9375TRLF
Brand: STMicroelectronics
SKU: L9375TRLF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9375TRLF

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 36-PowerBSSOP (0.433", 11.00mm Width)

Datasheet:: L9375TRLF.pdf

Description:: IC GATE DRVR LOW-SIDE POWERSO-36

Quantity:: RFQ Add To RFQ list

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Inventory:4,425

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Product details

Overview

L9375TRLF from STMicroelectronics is an SPI-controlled octal low-side valve driver IC with integrated recirculation diodes for Q5–Q8, featuring four 0.16 Ω (typ) constant-on outputs (Q1–Q4) and four 0.2 Ω (typ) PWM-programmable outputs (Q5–Q8), all with 35 V (min) zener clamping, used in automotive fuel injector and solenoid control systems.

For engineers reviewing the L9375TRLF datasheet, L9375TRLF pinout, L9375TRLF application, or L9375TRLF equivalent, this page delivers verified electrical specs, diagnostic capabilities (open-load, overcurrent, thermal warning, recirculation diode loss), SPI register mapping, and validated alternative drivers for valve actuation designs requiring high-reliability load monitoring and synchronized multi-channel timing.

Technical Context

The L9375TRLF implements dual-output-class architecture: Q1–Q4 operate as fixed-duty, current-limited low-side switches with symmetric DMOS switching; Q5–Q8 integrate programmable PWM generation, individual duty-cycle registers (addresses 6–13), and dedicated recirculation diodes-enabling precise energy recovery during inductive load de-energization.

Its diagnostics subsystem monitors per-channel conditions including undercurrent (open-load off-state), overcurrent, thermal warning/shutdown, PGND/SGND loss, and recirculation diode failure (Q5–Q8 only), all reported via 16-bit SPI status registers with configurable filtering times and silent valve driver test (SVDT) capability for non-intrusive validation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	8 independent low-side channels: Q1–Q4 fixed-on, Q5–Q8 PWM-controllable
R_DS(on) (Q1–Q4)	0.16 Ω (typ) - enables <1.5 W conduction loss at 3 A load current
R_DS(on) (Q5–Q8)	0.2 Ω (typ) - optimized for PWM efficiency with integrated recirculation diodes
Zener clamp voltage	≥35 V - protects against inductive kickback up to automotive 42 V transients
SPI interface	16-bit, up to 5 MHz - supports real-time diagnostics readback and register write with parity error detection
Diagnostic coverage	Detects open-load (off-state), undercurrent, overcurrent, thermal warning/shutdown, PGND/SGND loss, Dx-loss (Q5–Q8), and SVDT-pass/fail status
Supply voltage range	4.5 V to 28 V - battery-compatible operation across cold-crank to load-dump conditions

Pinout & Package

Package: PowerSO-36 (slug down), thermally enhanced exposed pad for high-power dissipation in automotive under-hood environments.

Pin/Terminal	Circuit Role	Design Meaning
Q1–Q4	Low-side driver output	Fixed-on channels with current limiting and open-load diagnostics; dual-pin per channel (pins 2–5) for Kelvin sensing
Q5–Q8	Low-side driver output	PWM-programmable channels with integrated recirculation diodes; dual-pin per channel (e.g., pins 6–7 for Q6)
D6/D8	Recirculation diode cathode/anode	Shared terminal pair for Q6 and Q8 diode return path; enables compact layout without external diodes
V_CC	Power supply input	4.5–28 V main supply; decoupling required near pin 33 (V_CC) per datasheet layout guidelines
SPICS, SPICLK, MOSI, MISO	SPI interface signals	4-wire full-duplex interface; MISO reports 16-bit status with fault bit mapping per channel and global diagnostics
CLKIN	External clock input	Monitored for frequency deviation; triggers CLKIN-failure diagnostic if out of tolerance (±10% typical)

Key Features

Feature	Design Value
Per-channel PWM programming	Q5–Q8 duty cycle individually set via registers 6–13; supports two consecutive duty values per channel for complex waveform shaping
Silent Valve Driver Test (SVDT)	Non-intrusive open-load and short-circuit verification without actuating valves; uses internal current sources and diagnostic logic
Output synchronization	Hardware-controlled time-shift between Q5–Q8 actuations (configurable via Sync + Sync-trigger register) for staggered solenoid firing
Integrated recirculation diodes	Built into Q5–Q8 output stages - eliminates 4 external diodes, reduces PCB area and BOM count
Comprehensive ground-loss detection	Separate monitoring of power ground (PGND-loss) and signal ground (SGND-loss); prevents false diagnostics due to wiring faults

Applications

Automotive Fuel Injectors

Diesel Common Rail Solenoids

Use Scenario: Precise metering of fuel delivery in gasoline direct injection (GDI) engines using eight independent injectors.

IC Role / Device Role / Timing Role: Low-side driver controlling injector coil energization/de-energization with synchronized PWM on Q5–Q8 and fixed-on drive on Q1–Q4.

Use Value: Integrated recirculation diodes and 35 V zener clamp ensure robust flyback energy handling during rapid valve closure, reducing EMI and improving lifetime.

Use Scenario: High-pressure diesel common rail systems requiring accurate, high-speed solenoid actuation for rail pressure modulation.

IC Role / Device Role / Timing Role: Eight-channel driver enabling staggered firing sequences via programmable time-shift between Q5–Q8 outputs.

Use Value: SVDT allows pre-start open-load verification without fuel flow, supporting ISO 26262 ASIL-B functional safety requirements for diagnostic coverage.

Transmission Shift Solenoids

Exhaust Gas Recirculation (EGR) Valves

Use Scenario: Control of hydraulic shift solenoids in automatic transmissions where timing accuracy and thermal resilience are critical.

IC Role / Device Role / Timing Role: Q1–Q4 drive high-current on/off solenoids; Q5–Q8 manage PWM-modulated pressure regulators with thermal shutdown protection.

Use Value: Dual R_DS(on) classes (0.16 Ω / 0.2 Ω) optimize conduction loss vs. switching efficiency across diverse solenoid impedance profiles.

Use Scenario: Duty-cycle-controlled EGR valve actuation to regulate exhaust gas reintroduction in gasoline and diesel engines.

IC Role / Device Role / Timing Role: Q5–Q8 deliver closed-loop PWM control with real-time current feedback and undercurrent/open-load detection.

Use Value: Per-channel diagnostics (including recirculation diode loss) enable early detection of valve stiction or coil degradation before emissions compliance drift occurs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal low-side driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VN808CM-E	8-channel, 0.15 Ω R_DS(on), no integrated recirculation diodes, SPI interface limited to 2.5 MHz	Lacks Q5–Q8 recirculation diodes and SVDT; requires external diodes and separate test circuitry	Preferred when cost sensitivity outweighs diagnostic depth and layout simplification needs
TLE7238-8ES	8-channel, 0.25 Ω R_DS(on), includes recirculation diodes but no SVDT or dual-output-class architecture	Supports basic diagnostics (open/short load) but lacks undercurrent, PGND/SGND loss, and silent test capability	Selected where legacy compatibility with Infineon ecosystem and simpler register map are prioritized

Compared with VN808CM-E and TLE7238-8ES, the L9375TRLF uniquely combines integrated recirculation diodes, SVDT, dual R_DS(on) classes, and comprehensive ground-loss detection-making it optimal for ASIL-B-compliant valve systems demanding zero-field diagnostic confidence and minimal external components.

Availability

L9375TRLF is available at Aetrix Electronics and suitable for automotive fuel injection, transmission solenoid control, and EGR valve actuation requiring stable component supply, long-term lifecycle support, and traceable sourcing for Tier-1 production programs.

Supply support for L9375TRLF 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 ISO/TS 16949-certified manufacturing.

The L9375TRLF belongs to ST's "Automotive Smart Power" product line, engineered specifically for high-reliability electro-mechanical actuation in engine management and transmission control units.

FAQ

What is the maximum continuous output current per channel?

Each channel supports up to 3.5 A DC continuous current (Q1–Q4) and 3.0 A DC (Q5–Q8) at T_j = 150 °C, as specified in Table 7 of the datasheet. Derating applies above 100 °C ambient; thermal shutdown activates at 175 °C junction temperature.

How does the Silent Valve Driver Test (SVDT) work without actuating the load?

SVDT applies controlled low-current pulses (<10 mA) through each output while monitoring voltage response and diagnostic flags. It detects open-circuit (no current flow), short-circuit (excessive current), and high-resistance faults without generating magnetic force or mechanical movement in the solenoid or injector.

Can Q1–Q4 be configured for PWM operation?

No-Q1–Q4 are hardwired for constant-on operation with current limiting and open-load diagnostics. Only Q5–Q8 support programmable PWM via dedicated duty-cycle registers (addresses 6–13) and duration timers; their gate drive architecture includes edge-shaping for EMI reduction.

What SPI clock polarity and phase settings are required?

The L9375TRLF requires SPI Mode 0 (CPOL = 0, CPHA = 0): idle clock low, sample on first edge (rising), setup on second edge (falling). This matches the timing diagram in Figure 10 and register access protocol defined in Section 4.1.3 of the datasheet.

L9375TRLF Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBSSOP (0.433", 11.00mm Width)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: Inverting, Non-Inverting

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: 5.2V ~ 20V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSO-36, Bottom Pad

L9375TRLF FAQ

1.How can I place an order for L9375TRLF through Aetrix?

Please submit a Request for Quotation (RFQ) for L9375TRLF 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 L9375TRLF reliable?

The price and inventory of L9375TRLF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9375TRLF is usually 5 days.

3.What payment methods are accepted for L9375TRLF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9375TRLF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9375TRLF?

L9375TRLF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9375TRLF 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 L9375TRLF?

For technical support, including L9375TRLF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9375TRLF requirements.

6.How does Aetrix verify that L9375TRLF is sourced from the original manufacturer or authorized distributors?

All L9375TRLF 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 L9375TRLF meets industry standards.

7.What is the process for return or replacement of L9375TRLF?

All L9375TRLF units undergo pre-shipment inspection (PSI). If there is an issue with L9375TRLF, 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 L9375TRLF part is unused and in its original packaging.

Return procedure for L9375TRLF:

1.Submit a request within 90 days.

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

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