Analog Devices Inc. LTC4368IMS-1#TRPBF

Overview

LTC4368IMS-1#TRPBF from Analog Devices is a bidirectional electronic circuit breaker and UV/OV/reverse supply protection controller for 2.5V–60V input systems. It controls back-to-back N-channel MOSFETs to protect loads from ±100V overvoltage, –40V reverse voltage, and forward/reverse overcurrent faults, with +50mV forward and –50mV reverse current sense thresholds. Used in automotive surge protection and industrial energy storage systems requiring robust fault isolation.

For engineers reviewing the LTC4368IMS-1#TRPBF datasheet, LTC4368IMS-1#TRPBF pinout, LTC4368IMS-1#TRPBF application, or LTC4368IMS-1#TRPBF equivalent, key selection criteria include its –40°C to +85°C operating range, 10-lead MSOP package, ±1.5% adjustable UV/OV thresholds, 80µA operating current, and bidirectional 50mV/–50mV current sensing capability for high-reliability power path control.

Technical Context

The LTC4368IMS-1#TRPBF implements dual precision comparators (UV/OV) with 0.5V reference, 25mV hysteresis, and sub-2µs propagation delay to enforce a user-defined valid input voltage window. Its internal charge pump delivers up to 13.1V gate drive referenced to VOUT, enabling low-R_DS(on) N-MOSFET configurations without P-channel complexity.

It integrates bidirectional overcurrent detection using a single external sense resistor: +50mV threshold for forward faults (VIN→VOUT), –50mV for reverse faults (VOUT→VIN). After reverse fault clearance, automatic reconnection occurs only when VOUT falls ≥100mV below VIN-ensuring safe recovery from negative transients.

Key Specifications

Pinout & Package

Package: 10-Lead Plastic MSOP (LTGTG marking), exposed pad optional for thermal relief or grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC4368IMS-2#TRPBF, the LTC4368IMS-1#TRPBF provides stronger reverse polarity blocking at –50mV threshold, making it more suitable for automotive battery reversal protection; versus TPS26631RGER, it offers design flexibility through external MOSFET control and fully adjustable UV/OV thresholds, essential for custom industrial power architectures.

Availability

LTC4368IMS-1#TRPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial energy storage interfaces, and portable instrumentation requiring stable component supply with guaranteed long-term availability.

Supply support for LTC4368IMS-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, Inc. 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 high-voltage, bidirectional protection controllers designed specifically for mission-critical power path management in harsh environments where reverse polarity, overvoltage, and bidirectional fault currents threaten system integrity.

FAQ

What is the reverse overcurrent threshold for LTC4368IMS-1#TRPBF?

The LTC4368IMS-1#TRPBF has a fixed –50mV reverse overcurrent threshold (SENSE – VOUT), meaning it trips when reverse current causes a –50mV drop across the external sense resistor. This value is specified in the datasheet Rev. C, Electrical Characteristics table under ΔVSENSE,R for LTC4368-1 variants. It is distinct from the –3mV threshold used in LTC4368-2 versions.

Does LTC4368IMS-1#TRPBF support adjustable undervoltage and overvoltage thresholds?

Yes, LTC4368IMS-1#TRPBF supports fully adjustable UV and OV thresholds via external resistor dividers connected to the UV and OV pins. Each uses a precision 0.5V internal reference with ±1.5% accuracy over temperature, enabling user-defined windows such as 7V–36V. The datasheet provides a three-step procedure for calculating resistor values while minimizing offset errors from pin leakage.

What package type and temperature grade does LTC4368IMS-1#TRPBF use?

LTC4368IMS-1#TRPBF uses a 10-lead plastic MSOP package (marked LTGTG) with an operating temperature range of –40°C to +85°C (I-grade). This is confirmed in the "ORDER INFORMATION" section of the datasheet Rev. C, which explicitly lists LTC4368IMS-1#TRPBF under the MSOP package row with "–40°C to 85°C" temperature range.

How does LTC4368IMS-1#TRPBF handle recovery after a reverse current fault?

After a reverse current fault, LTC4368IMS-1#TRPBF waits until VOUT falls at least 100mV below VIN before automatically reconnecting the external MOSFETs. This ensures the reverse condition is fully cleared before power restoration. The behavior is inherent to the device's reverse fault comparator architecture and does not require external timing components or SHDN toggling.

Can LTC4368IMS-1#TRPBF be used with back-to-back P-channel MOSFETs?

No, LTC4368IMS-1#TRPBF is specifically designed to drive back-to-back N-channel MOSFETs using its VOUT-referenced charge pump. Its GATE output enhances above VOUT-not VIN-making it incompatible with P-MOSFET source-follower configurations. The datasheet Block Diagram and Applications Information sections explicitly state N-MOSFET control and provide example circuits using dual N-channel devices like SiR870 and Si7942.