Analog Devices Inc. LTC4368IDD-2#TRPBF

Overview

LTC4368IDD-2#TRPBF from Analog Devices is a bidirectional electronic circuit breaker and UV/OV/reverse protection controller for 2.5V–60V input systems. It controls back-to-back N-channel MOSFETs to protect loads from –40V reverse voltage, +100V overvoltage, and forward/reverse overcurrent faults with ±1.5% adjustable thresholds, 50mV forward/–3mV reverse sense thresholds, and 80µA operating current. It is used in automotive surge protection and energy storage systems requiring robust fault isolation.

For engineers reviewing the LTC4368IDD-2#TRPBF datasheet, LTC4368IDD-2#TRPBF pinout, LTC4368IDD-2#TRPBF application, or LTC4368IDD-2#TRPBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature grade, 3mm × 3mm DFN-10 package, bidirectional current sensing (–3mV reverse threshold), AEC-Q100 qualification, and 32ms turn-on delay for AC line rejection and supply debouncing.

Technical Context

The LTC4368IDD-2#TRPBF implements dual high-accuracy comparators for UV/OV monitoring with 0.5V internal reference, 25mV hysteresis, and <1µs propagation delay. Its bidirectional current sensing uses separate forward (+50mV) and reverse (–3mV) thresholds referenced to SENSE–VOUT, enabling precise detection of both load-to-source and source-to-load fault currents.

It integrates a charge pump gate driver delivering up to 13.1V enhancement above VOUT, fast (2µs) and slow (275µs) GATE pull-down paths, and configurable forward overcurrent recovery via RETRY pin capacitance. The 32ms GATE turn-on delay blocks 50Hz/60Hz AC power and debounces hot-swap events without external timing components.

Key Specifications

Pinout & Package

Package: 10-Lead (3mm × 3mm) Plastic DFN with exposed pad (optional ground connection). Industrial temperature grade: –40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional overvoltage/overcurrent protection applications.

Compared with LTC4368IDD-1#TRPBF and TPS26631RGER, the LTC4368IDD-2#TRPBF uniquely delivers ultra-sensitive (–3mV) reverse current detection in an AEC-Q100 qualified, discrete-MOSFET-controlled architecture - essential for battery backup integrity and energy harvesting systems where microamp-level reverse leakage must be blocked.

Availability

LTC4368IDD-2#TRPBF is available at Aetrix Electronics and suitable for automotive surge protection, energy storage system interfaces, and portable instrumentation requiring stable component supply with guaranteed long-term availability.

Supply support for LTC4368IDD-2#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC4368 product line delivers precision, bidirectional power protection controllers for harsh environments - designed specifically for automotive, industrial, and battery-backed systems demanding fail-safe UV/OV/reverse/overcurrent isolation.

FAQ

What is the reverse current sense threshold of the LTC4368IDD-2#TRPBF?

The LTC4368IDD-2#TRPBF has a reverse current sense threshold of –3mV (SENSE–VOUT), which is fixed and distinct from the –50mV threshold of the LTC4368-1 variant. This ultra-low threshold enables detection of minute reverse leakage currents in battery backup or energy harvesting applications. The LTC4368IDD-2#TRPBF uses this value to trigger immediate gate turn-off when reverse conduction exceeds design limits.

Does the LTC4368IDD-2#TRPBF support AEC-Q100 qualification?

Yes, the LTC4368IDD-2#TRPBF is AEC-Q100 qualified for automotive applications across the –40°C to +85°C temperature range. Its qualification covers stress testing for temperature cycling, humidity, and ESD robustness, making it suitable for under-hood and infotainment power rail protection. The LTC4368IDD-2#TRPBF part marking and packaging reflect this automotive-grade compliance.

How does the 32ms turn-on delay function in the LTC4368IDD-2#TRPBF?

The 32ms turn-on delay in the LTC4368IDD-2#TRPBF is an internal timer that enforces a mandatory wait period after UV/OV faults clear before re-enabling the GATE driver. This delay inherently blocks 50Hz and 60Hz AC power and suppresses supply noise-induced chatter during hot-swap events. The LTC4368IDD-2#TRPBF applies this delay automatically - no external components are needed.

Can the LTC4368IDD-2#TRPBF control back-to-back N-channel MOSFETs?

Yes, the LTC4368IDD-2#TRPBF is explicitly designed to control external back-to-back N-channel MOSFETs using its GATE output and charge pump architecture. It provides up to 13.1V of gate enhancement above VOUT to fully enhance both MOSFETs, enabling low-R_DS(on) conduction in either direction. The LTC4368IDD-2#TRPBF datasheet confirms this topology in all reference designs and functional descriptions.

What is the operating temperature range of the LTC4368IDD-2#TRPBF?

The LTC4368IDD-2#TRPBF operates across –40°C to +85°C, denoted by the "I" grade in its part number. This industrial temperature range is validated per Analog Devices' specifications and supported by full electrical characterization across the span. The LTC4368IDD-2#TRPBF maintains ±1.5% UV/OV threshold accuracy and stable –3mV reverse sense performance throughout this range.