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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

STMicroelectronics L6375S

Name: L6375S
Brand: STMicroelectronics
SKU: L6375S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6375S

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: L6375S.pdf

Description:: IC PWR SWITCH N-CHAN 1:1 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,560

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Product details

Overview

L6375S from STMicroelectronics is a 0.5 A monolithic high-side intelligent power switch in multipower BCD technology, designed to drive inductive, capacitive, or resistive loads with controlled slew rate and non-dissipative short-circuit protection. It operates from 8–35 V supply, features dual diagnostic open-drain outputs (DIAG1/DIAG2), internal voltage clamping (53 V typ), and open-load detection - deployed in industrial PLC output stages and motor control I/O modules.

For engineers reviewing the L6375S datasheet, L6375S pinout, L6375S application, or L6375S equivalent, key selection criteria include its programmable short-circuit on-time via external capacitor, differential input with ±7 V common-mode range and hysteresis, thermal shutdown at 150 °C, undervoltage lockout with 500 mV hysteresis, and SO-8 package compatibility with standard FR-4 PCB layouts.

Technical Context

The L6375S integrates a high-side NDMOS power switch with embedded current limiting, thermal sensing, and undervoltage monitoring. Its diagnostic logic decodes fault conditions-including short-to-VS, short-to-ground, open load (<3 mA), overtemperature, and UV-into two open-drain outputs using a deterministic truth table.

Short-circuit protection operates in non-dissipative mode: during overload, the MOSFET enters linear regulation to clamp current at 1.1 A (typ), sustained for a user-programmable t_ON (1.28 μs/pF) before forced off-time (t_OFF = 64 × t_ON). Internal Zener clamping (53 V typ) enables fast demagnetization of inductive loads up to 200 mJ at 85 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current	0.5 A continuous; supports 625 mA pulsed loads without derating at 25 °C
Supply voltage range	8–35 V DC; valid operation down to 4 V for diagnostic enable only
Output voltage drop	280 mV max at 500 mA/25 °C; ensures <140 mW conduction loss
Short-circuit current limit	1.1 A typical; enables safe current limiting without external sense resistor
Thermal shutdown threshold	150 °C with 20 °C hysteresis; prevents latch-up during sustained overload
Input threshold hysteresis	400 mV typical; rejects noise spikes on IN+ in electrically noisy industrial environments
Slew rate control	1 V/μs typical; limits EMI during switching of inductive loads

Pinout & Package

Package: SO-8 (Small Outline, 8-pin, surface-mount), ECOPACK® compliant, with 1.27 mm pitch and standard FR-4 footprint per Figure 10 (DocID12603 Rev 9).

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Power ground reference	Common return path for internal bias, diagnostics, and output current
2 OUTPUT	High-side switched output	Drives load between VS and this pin; includes internal current limit and clamping diode
3 VS	Positive supply input	Monitored for undervoltage lockout; powers internal circuitry and gate driver
4 Output status	Current-source LED driver	Sources 2–4 mA when OUTPUT is high; simplifies visual status indication without external transistor
5 DIAG1	Diagnostic open-drain output	Reports faults including UV, OVT, and open load; pulled low during active fault
6 DIAG2	Diagnostic open-drain output	Reports short-to-VS, short-to-ground, and thermal shutdown; complements DIAG1 for full fault decoding
7 IN+	Differential input comparator	TTL/CMOS-compatible with -7 to VS+0.3 V common-mode range and built-in hysteresis
8 ON DELAY	Capacitor-programmed timing node	Sets t_ON (1.28 μs/pF) for short-circuit recovery cycle; grounded to disable protection

Key Features

Feature	Design Value
Non-dissipative short-circuit protection	Enables indefinite safe operation under permanent overload by cycling t_ON/t_OFF without thermal runaway
Internal negative voltage clamp	Zener clamping at 53 V (typ) eliminates need for external flyback diode in solenoid/relay drivers
Dual independent diagnostic outputs	DIAG1/DIAG2 encode 6 distinct fault states via truth table, enabling CPU-level root-cause identification
Open load detection	Active below 3 mA output current; distinguishes disconnected loads from shorted ones in safety-critical I/O
Immunity to burst transients	Complies with IEC 61000-4-4 level 3 (±2 kV), validated for industrial control cabinet environments

Applications

PLC Digital Output Module

Industrial Solenoid Driver

Use Scenario: Driving 24 V DC solenoids in modular I/O racks with shared backplane power.

IC Role / Device Role / Timing Role: High-side switch providing load isolation, current limiting, and real-time fault reporting to controller CPU.

Use Value: Eliminates need for discrete protection components while enabling predictive maintenance via DIAG1/DIAG2 fault decoding.

Use Scenario: Controlling pneumatic valve actuators in factory automation systems subject to frequent ESD and load dump events.

IC Role / Device Role / Timing Role: Robust load interface with integrated demagnetization clamp and open-load detection for valve position verification.

Use Value: Reduces system-level failure rate by detecting coil opens before actuation attempts, avoiding process downtime.

Motor Control I/O Stage

Smart Lighting Controller

Use Scenario: Driving small DC brush motors in conveyor belt controllers where stall detection and thermal margin are critical.

IC Role / Device Role / Timing Role: Current-limited high-side driver with thermal shutdown and programmable short-circuit response time.

Use Value: Prevents MOSFET destruction during mechanical jams by cycling into safe linear mode instead of dissipating excess energy.

Use Scenario: Switching cold-filament incandescent lamps in building management systems with inrush current suppression.

IC Role / Device Role / Timing Role: Controlled-slew-rate switch with adaptive short-circuit timing to avoid false trips during lamp turn-on surge.

Use Value: Enables reliable lamp control without external inrush limiters, reducing BOM count and board space.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side intelligent power switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VNS1NV04PTR-E	0.4 A rating, no internal clamping diode, single diagnostic output, SO-8 package	Lacks demagnetization capability and dual-fault reporting; requires external Zener for inductive loads	Select when cost sensitivity outweighs need for integrated protection and diagnostics
TPS27081A	0.8 A rating, 2.7–18 V supply, no open-load detection, 8-pin WSON package	Lower voltage range excludes 24 V industrial use; smaller thermal pad but no SO-8 drop-in replacement	Prefer for compact 12 V embedded systems where board space is constrained and diagnostics are simplified

Compared with VNS1NV04PTR-E and TPS27081A, the L6375S uniquely combines 24 V industrial supply compatibility, internal 53 V clamping, dual-diagnostic truth-table decoding, and programmable short-circuit recovery - making it optimal for safety-aware PLC and motion I/O designs requiring zero external protection components.

Availability

L6375S is available at Aetrix Electronics and suitable for industrial PLC output modules, motor control I/O stages, solenoid driver circuits, and smart lighting controllers requiring stable component supply across extended temperature ranges (-25 to +125 °C).

Supply support for L6375S 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 vertical manufacturing capabilities.

The L6375S belongs to ST's Intelligent Power Switch (IPS) product line, engineered specifically for robust, self-protected high-side switching in harsh industrial environments where reliability, fault transparency, and minimal external components are mandatory.

FAQ

What is the maximum inductive energy the L6375S can safely absorb during demagnetization?

The L6375S absorbs up to 200 mJ of inductive energy at TJ = 85 °C, enabled by its internal 53 V Zener clamp. This value is measured with a 10 ms pulse width and 20% duty cycle, and scales inversely with junction temperature - at 125 °C, the safe energy limit reduces to approximately 120 mJ per ST's thermal derating curve.

How does the ON DELAY pin affect short-circuit behavior?

The ON DELAY pin sets the t_ON duration (1.28 μs/pF) during short-circuit events. When overloaded, the device limits current to 1.1 A for t_ON, then forces t_OFF = 64 × t_ON. Grounding this pin disables programmable recovery and locks the device into immediate shutdown after current limiting, with diagnostics disabled.

Can the L6375S drive a 24 V LED indicator directly?

Yes - the OUTPUT STATUS pin sources 2–4 mA at 2.5 V compliance, sufficient to drive standard 2 mA LEDs. With VS = 24 V, the voltage drop across the internal driver is 1.5–3 V, leaving ≥20 V for series resistor selection. No external transistor or current-limiting resistor is required for basic status indication.

Is the L6375S compatible with 3.3 V microcontroller GPIOs?

Yes - the IN+ input accepts TTL/CMOS logic levels with thresholds of 0.8–2 V (low) and 2–15 V (high), and supports common-mode voltages from -7 V to VS+0.3 V. A 3.3 V MCU GPIO directly drives IN+ without level shifting, and hysteresis (400 mV typ) ensures noise immunity in industrial settings.

L6375S Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Series:: -

Packaging:: Tube

Product Status:: Active

Switch Type:: General Purpose

Number of Outputs:: 1

Ratio - Input:Output:: 1:1

Output Configuration:: High Side

Output Type:: N-Channel

Interface:: On/Off

Voltage - Load:: 8V ~ 35V

Voltage - Supply (Vcc/Vdd):: Not Required

Current - Output (Max):: 500mA

Rds On (Typ):: -

Input Type:: Non-Inverting

Features:: Status Flag

Fault Protection:: Current Limiting (Fixed), Open Load Detect, Over Temperature, UVLO

Operating Temperature:: -25°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

L6375S FAQ

1.How can I place an order for L6375S through Aetrix?

Please submit a Request for Quotation (RFQ) for L6375S 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 L6375S reliable?

The price and inventory of L6375S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6375S is usually 5 days.

3.What payment methods are accepted for L6375S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6375S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6375S?

L6375S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6375S 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 L6375S?

For technical support, including L6375S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6375S requirements.

6.How does Aetrix verify that L6375S is sourced from the original manufacturer or authorized distributors?

All L6375S 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 L6375S meets industry standards.

7.What is the process for return or replacement of L6375S?

All L6375S units undergo pre-shipment inspection (PSI). If there is an issue with L6375S, 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 L6375S part is unused and in its original packaging.

Return procedure for L6375S:

1.Submit a request within 90 days.

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

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