Analog Devices Inc. LTC4364IMS-1#TRPBF

Overview

LTC4364IMS-1#TRPBF from Analog Devices is a surge stopper with ideal diode controller for automotive and industrial high-reliability power rails. It protects downstream loads from 200V/1ms transients, regulates output to 27V during overvoltage (e.g., load dump), provides reverse input protection to –40V, and drives dual N-channel MOSFETs for active ORing and holdup. Used in 12V/24V vehicle subsystems requiring AEC-Q100-compliant transient resilience.

For engineers reviewing the LTC4364IMS-1#TRPBF datasheet, LTC4364IMS-1#TRPBF pinout, LTC4364IMS-1#TRPBF application, or LTC4364IMS-1#TRPBF equivalent, this page delivers verified functional specifications, MSOP-16 package layout, fault timer behavior, ideal diode regulation accuracy, and automotive-grade thermal performance - all confirmed against Analog Devices' Rev. B datasheet and official ordering information.

Technical Context

The LTC4364IMS-1#TRPBF implements dual-loop control: a voltage amplifier regulates HGATE to clamp V_OUT at 27V via FB feedback during overvoltage, while a current amplifier limits ∆V_SENSE–OUT to 50mV (or 25mV during output short) to protect the pass MOSFET. Its fault timer uses TMR capacitor charging proportional to (V_CC – V_OUT) to dynamically scale timeout based on MOSFET power dissipation.

As the -1 variant, it latches HGATE off after fault timeout and requires manual reset via SHDN or UV pin; it does not auto-retry. The integrated ideal diode controller maintains 30mV forward drop across DGATE-driven MOSFETs and actively pulls DGATE to SOURCE within 1.5μs upon reverse current detection, minimizing output disturbance during input collapse or short.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP (3mm × 4.9mm), exposed pad optional, θ_JA = 120°C/W. Pin 1 = OUT; Pin 16 = FB. Pins 3 and 7 are NC (no internal connection).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar surge protection and ideal diode control applications.

Compared with LTC4364IMS-2#TRPBF, the LTC4364IMS-1#TRPBF provides deterministic fail-safe shutdown essential for ASIL-B systems, while TPS26631PWPR lacks both overvoltage regulation and ideal diode functionality - making it unsuitable as a direct replacement in automotive surge protection roles.

Availability

LTC4364IMS-1#TRPBF is available at Aetrix Electronics and suitable for automotive ECU protection, industrial hot-swap ports, redundant power ORing, and reverse-battery hardened modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC4364IMS-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC4364 product line delivers integrated surge stopper and ideal diode control for harsh-environment power rails, specifically engineered for automotive load dump resilience, reverse polarity immunity, and AEC-Q100-compliant reliability.

FAQ

What is the key functional difference between LTC4364IMS-1#TRPBF and LTC4364IMS-2#TRPBF?

The LTC4364IMS-1#TRPBF latches HGATE off after fault timeout and requires manual reset via SHDN or UV pin, ensuring fail-safe shutdown. In contrast, the LTC4364IMS-2#TRPBF automatically retries after a 32-cycle cool-down timer, with a 0.1% duty cycle during overvoltage faults. This makes the -1 variant appropriate for safety-critical automotive applications where uncontrolled restart is prohibited, while the -2 suits systems prioritizing continuous uptime.

How does LTC4364IMS-1#TRPBF achieve reverse input protection to –40V?

The LTC4364IMS-1#TRPBF achieves –40V reverse input protection through internal clamp structures on the VCC and SOURCE pins, validated per Absolute Maximum Ratings. When VCC drops below GND, internal circuitry pulls HGATE and DGATE to SOURCE potential, turning off both external N-MOSFETs and blocking reverse current. No external components are needed - the specification is guaranteed across the full –40°C to +85°C operating range.

Can LTC4364IMS-1#TRPBF regulate output voltage to a value other than 27V?

Yes. The LTC4364IMS-1#TRPBF regulates output voltage via the FB pin, which targets an internal 1.25V reference. By selecting appropriate resistor values in the FB divider (R1 from OUT to FB, R2 from FB to GND), users can set the clamp voltage to any value from ~5V to 36V. For example, a 21.5kΩ (R1) and 1kΩ (R2) divider yields 27V. The datasheet provides design equations and tolerance guidance for precision setting.

What is the purpose of the TMR pin on LTC4364IMS-1#TRPBF, and how is its timing determined?

The TMR pin on LTC4364IMS-1#TRPBF sets fault timing via an external capacitor to GND. During overvoltage or overcurrent, a current source charges TMR proportionally to (VCC – VOUT); higher differential voltage accelerates charging to protect the MOSFET's safe operating area. Thresholds at 1.25V (FLT warning), 1.35V (HGATE latch-off), and 0.15V (cool-down completion) define timing phases. Capacitor value directly scales timeout - e.g., 6.8µF yields ~50ms at 20V differential.

Is LTC4364IMS-1#TRPBF compatible with standard 16-lead MSOP footprints and reflow profiles?

Yes. The LTC4364IMS-1#TRPBF uses a standard 16-lead plastic MSOP package (3mm × 4.9mm, 0.65mm pitch) with JEDEC-compliant dimensions and thermal characteristics. It supports industry-standard Pb-free reflow profiles (J-STD-020), with peak temperature up to 260°C for 10 seconds. The exposed pad is optional for thermal enhancement but not required for electrical functionality.