STMicroelectronics L6370D013TR

Overview

L6370D013TR from STMicroelectronics is a 2.5 A high-side intelligent power switch in PowerSO-20 package, designed for industrial load control with integrated non-dissipative short-circuit protection, open-load detection, and dual diagnostic outputs. It operates from 9.5 V to 35 V supply, features internal current limiting (I_SC = 3.2 A typ.), thermal shutdown, and ±50 V internal clamp for fast demagnetization of inductive solenoids and valves.

For engineers reviewing the L6370D013TR datasheet, L6370D013TR pinout, L6370D013TR application, or L6370D013TR equivalent, this device supports robust diagnostics in PLC I/O modules, motor starter circuits, and industrial valve drivers where fault reporting, surge immunity (IEC 61000-4-5), and programmable ON-delay timing are critical.

Technical Context

The L6370D013TR integrates a high-voltage DMOS output stage with differential input comparators (V_ITH = 1.4 V typ., hysteresis = 400 mV max) and programmable short-circuit response via external capacitor on ON-DELAY pin (t_ON = 1.28 μs/pF). Its diagnostic logic continuously monitors output status, supply voltage (UV thresholds at 8.5 V/9.0 V), junction temperature (Θ_LIM = 150 °C), and load condition.

It implements non-dissipative short-circuit protection by forcing linear-mode operation during overcurrent events, limiting energy dissipation while sustaining 3.2 A for up to 2.56 ms before disabling output. Internal clamping (V_CL = 53 V typ.) enables safe inductive load demagnetization without external components, supporting up to 1 J energy absorption at T_J = 85 °C.

Key Specifications

Pinout & Package

Package: PowerSO-20 - thermally enhanced surface-mount package with exposed die attach pad, R_thJC = 1.5 °C/W, suitable for high-power industrial PCBs requiring efficient heat transfer to copper planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VND5E025AKTR-E and TPS27082LDR, the L6370D013TR delivers superior thermal management (R_thJC = 1.5 °C/W), dual-diagnostic reporting, programmable fault timing, and integrated 53 V clamp-making it the sole choice for mission-critical 24 V industrial switching where reliability, diagnostics, and inductive load handling are non-negotiable.

Availability

L6370D013TR is available at Aetrix Electronics and suitable for PLC digital output modules, industrial solenoid valve drivers, and motor starter auxiliary controls requiring stable component supply across multi-year production cycles.

Supply support for L6370D013TR 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The L6370D013TR belongs to ST's Intelligent Power Switch (IPS) product line, engineered specifically for industrial automation applications demanding high reliability, comprehensive diagnostics, and robust EMC performance in harsh electromagnetic environments.

FAQ

What is the maximum inductive energy the L6370D013TR can safely absorb during demagnetization?

The L6370D013TR is rated for 1 J of inductive energy absorption at junction temperature T_J = 85 °C, enabled by its internal 53 V clamp (V_CL). This value is validated per Table 3 in the datasheet and applies to single-pulse events with t_p ≤ 300 μs. Exceeding this energy risks thermal runaway or permanent damage, so load inductance and current must be sized accordingly.

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

Connecting a capacitor (50 pF–2 nF) between ON-DELAY and GND sets t_ON = 1.28 μs/pF, defining the duration the output remains active during a short circuit before disabling. If ON-DELAY is grounded, non-dissipative protection is disabled and the device relies solely on thermal shutdown, delivering Isc until junction temperature exceeds 150 °C.

Can the L6370D013TR drive a 24 V incandescent lamp directly?

Yes-the L6370D013TR supports cold-filament inrush currents up to 6 A peak (per I_FP spec) and uses programmable t_ON to avoid false tripping during initial heating. Its 3.2 A short-circuit limit and thermal hysteresis (20 °C) allow safe operation with lamps drawing ≤2.5 A steady-state current, provided PCB copper area meets thermal guidelines.

What is the purpose of the OUTSTATUS pin, and how is it used?

OUTSTATUS is a 2–4 mA current-source output that drives an LED to indicate high-side output status. It sources current when V_OUT > V_OTH1 (5 V typ.), providing immediate visual confirmation of load activation on control panels. Unlike DIAG outputs, it is not fault-signaling-only reflects output voltage presence, independent of diagnostic state.