Analog Devices Inc. LTC4367HMS8-1#TRPBF

Overview

LTC4367HMS8-1#TRPBF from Analog Devices is a high-voltage, fast-recovery N-channel MOSFET controller for input supply fault protection. It provides ±40V reverse voltage blocking, 100V overvoltage tolerance, and 500µs fault recovery - enabling robust protection in automotive load-dump and industrial hot-swap applications with back-to-back Si7942 dual N-MOSFETs.

For engineers reviewing the LTC4367HMS8-1#TRPBF datasheet, LTC4367HMS8-1#TRPBF pinout, LTC4367HMS8-1#TRPBF application, or LTC4367HMS8-1#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating range, 500µs GATE turn-on delay (vs. 32ms in standard LTC4367), adjustable UV/OV thresholds via external resistive dividers, and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The LTC4367HMS8-1#TRPBF integrates dual precision comparators (0.5V threshold, 25mV hysteresis) for user-configurable undervoltage and overvoltage monitoring, coupled with a high-voltage charge pump delivering up to 13.1V gate enhancement referenced to VOUT. Its reverse-voltage detection circuit actively clamps GATE to VIN during negative transients, ensuring reliable blocking of –40V faults.

Unlike the standard LTC4367, the "-1" variant replaces the 32ms power-good debounce timer with a 500µs GATE turn-on delay (tD(ON)), enabling rapid reconnection after transient faults while retaining full 100V/–40V protection capability and 70µA operating current. The FAULT open-drain output asserts low on UV/OV violation, SHDN assertion, or VIN < VIN(UVLO).

Key Specifications

Pinout & Package

Package: 8-Lead Plastic MSOP (MS8), 3.0mm × 3.0mm footprint, exposed pad (optional ground connection). RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar input voltage fault protection applications.

Compared with LTC4367IMS8-1#TRPBF, the LTC4367HMS8-1#TRPBF delivers guaranteed operation at 125°C ambient - essential for engine bay placement - while maintaining identical 500µs recovery and protection thresholds; versus TPS26631PWPR, it offers superior voltage fault coverage but requires external MOSFETs and resistor programming.

Availability

LTC4367HMS8-1#TRPBF is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC hot-swap interfaces, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC4367HMS8-1#TRPBF 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

Analog Devices (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving aerospace, automotive, industrial, and communications markets.

The LTC4367 family was designed specifically for high-reliability input fault protection in harsh environments - combining wide-voltage tolerance, precision window monitoring, and fast recovery in compact packages for automotive and industrial power entry stages.

FAQ

What is the maximum input voltage the LTC4367HMS8-1#TRPBF can withstand?

The LTC4367HMS8-1#TRPBF has an absolute maximum VIN rating of –40V to +100V. This allows it to survive automotive load dump events and accidental reverse-battery connections without damage or latch-up, while its normal operating range remains 2.5V to 60V for functional control of external MOSFETs.

How does the LTC4367HMS8-1#TRPBF differ from the standard LTC4367HMS8#TRPBF?

The LTC4367HMS8-1#TRPBF features a 500µs GATE turn-on delay (tD(ON)) instead of the 32ms delay in the standard LTC4367HMS8#TRPBF. This enables rapid reconnection after brief overvoltage or undervoltage transients while retaining identical protection thresholds, temperature range (–40°C to +125°C), and pinout.

Which external MOSFETs are recommended for use with the LTC4367HMS8-1#TRPBF in a 24V automotive system?

For 24V nominal systems requiring 100V surge handling, the Si7942 dual N-channel MOSFET (100V VDS, 4V VTH, 49mΩ RDS(ON)) is explicitly validated in the LTC4367 datasheet. Its matched pair configuration enables bidirectional blocking and is optimized for the LTC4367HMS8-1#TRPBF's gate drive characteristics and reverse-protection behavior.

Can the LTC4367HMS8-1#TRPBF protect against AC line transients such as 50Hz/60Hz mains coupling?

Yes - the LTC4367HMS8-1#TRPBF inherently blocks 50Hz and 60Hz AC power due to its 500µs (or 32ms in non-"-1" variants) GATE turn-on delay, which prevents the external MOSFETs from conducting during half-cycle excursions outside the UV/OV window. This eliminates need for additional AC-blocking circuitry in DC-input systems exposed to conducted noise.

What is the purpose of the FAULT pin on the LTC4367HMS8-1#TRPBF, and how should it be interfaced?

The FAULT pin on the LTC4367HMS8-1#TRPBF is a high-voltage open-drain output that pulls low during UV/OV violations, SHDN assertion, or VIN < VIN(UVLO). It should be pulled up to a logic-compatible voltage (e.g., 3.3V or 5V) and monitored by a microcontroller GPIO or dedicated fault manager to trigger system-level responses like LED alerts or controlled shutdown sequences.