STMicroelectronics L6375D

Overview

L6375D from STMicroelectronics is 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 delivers 0.5 A output current, operates from 8–35 V supply, integrates internal voltage clamping (53 V typical), differential input with hysteresis, and dual diagnostic outputs - deployed in industrial PLC I/O modules for solenoid and valve control.

For engineers reviewing the L6375D datasheet, L6375D pinout, L6375D application, or L6375D equivalent, key selection criteria include its open-load detection capability (3 mA threshold), thermal shutdown at 150 °C, undervoltage lockout with 500 mV hysteresis, and SO-20 package compatibility with industrial PCB layouts requiring robust ESD (±2 kV HBM) and burst transient immunity (IEC 61000-4-4).

Technical Context

The L6375D implements a protected high-side DMOS output stage with integrated Zener clamp (V_cl = 53 V) enabling fast demagnetization of inductive loads up to 200 mJ. Its input section features TTL/CMOS-compatible differential comparator with 400 mV hysteresis and ±7 V common-mode range, ensuring noise immunity in electrically noisy factory environments.

Diagnostic logic uses two open-drain outputs (DIAG1/DIAG2) to encode six fault conditions - including short-to-VS, short-to-ground, open load (<3 mA), overtemperature (150 °C), and undervoltage (7.5 V threshold) - via truth-table-driven status reporting without external microcontroller intervention.

Key Specifications

Pinout & Package

Package: SO-20 (Small Outline Integrated Circuit, 20-pin, wide-body, 0.5 mm pitch). Dimensions per JEDEC MS-013, 12.6 × 7.6 mm body, 2.65 mm height, R_th(JA) = 65 °C/W on FR4 with 0.5 cm² copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VND5E025AK and TLE7231G, the L6375D uniquely combines dual-diagnostic encoding, programmable short-circuit timing, and open-load detection in a single SO-20 device - making it optimal for industrial I/O modules requiring autonomous fault classification without host processor overhead.

Availability

L6375D is available at Aetrix Electronics and suitable for industrial PLC output modules, automated valve control systems, and factory-floor lighting control requiring stable component supply across extended temperature ranges (-25 to +125 °C).

Supply support for L6375D 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 and broad portfolio coverage.

The L6375D belongs to ST's Intelligent Power Switch (IPS) product line, engineered specifically for robust, self-protected high-side switching in harsh industrial environments - emphasizing diagnostic autonomy, EMC resilience, and long-term reliability over 15-year field deployments.

FAQ

What is the maximum inductive energy the L6375D can safely absorb during demagnetization?

The L6375D absorbs up to 200 mJ of inductive energy at junction temperature 85 °C, enabled by its internal 53 V Zener clamp. This value is measured with pulsed operation and assumes proper PCB thermal design (R_th(JA) ≤ 65 °C/W). Exceeding this energy risks latch-up or permanent damage, especially at elevated ambient temperatures.

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 using an external capacitor. After t_ON, the device enters t_OFF = 64×t_ON, then retries. Grounding the pin disables retry and forces immediate latching at ISC - useful for permanent fault lockout in safety-critical designs.

Can the L6375D drive capacitive loads like LED strings without oscillation?

Yes - its controlled slew rate (0.7–1.5 V/μs) and input hysteresis (400 mV) prevent ringing and false triggering when switching LED loads. However, large capacitive loads (>100 nF) may trigger temporary current limiting at turn-on; verify with actual layout parasitics and use soft-start if needed.

Is the STATUS pin compatible with standard 5 mm LEDs?

Yes - the STATUS pin sources 2–4 mA at 2.5 V drop, sufficient to drive standard red/green 5 mm LEDs (typical V_F = 1.8–2.2 V, I_F = 2–5 mA). No series resistor is required; connect LED anode to STATUS and cathode to GND for direct indication of output state.