LTC4368IDD-1#PBF

Updated: 2026-09-16

Overview

The LTC4368IDD-1#PBF is a robust surge stopper and overvoltage protector IC manufactured by Analog Devices. It is designed to protect sensitive electronic components from damaging voltage transients, reverse polarity, and overcurrent conditions. This IC is widely used in industrial, automotive, and telecommunications systems where reliable power supply protection is critical. Its compact DFN package and high-performance characteristics make it suitable for space-constrained applications. The device operates over a wide input voltage range, ensuring versatility across various power supply designs. It is particularly valued for its fast response time and low power consumption.

Structure and Working Principle

The LTC4368IDD-1#PBF integrates a precision comparator, MOSFET gate driver, and control logic into a single chip. It monitors the input voltage and disconnects the load when an overvoltage or undervoltage condition is detected. The IC uses an external N-channel MOSFET to isolate the load, providing flexible and scalable protection. When the input voltage exceeds or falls below user-adjustable thresholds, the device quickly turns off the MOSFET, preventing damage to downstream components. It also includes reverse voltage protection and can withstand transient voltages up to 80V. The low quiescent current ensures minimal power loss during normal operation.

Key Features

The LTC4368IDD-1#PBF offers several standout features, including a wide operating voltage range of 4V to 80V, making it suitable for both low-voltage and high-voltage systems. Its fast response time (typically less than 1µs) ensures effective protection against sudden voltage spikes. Other notable features include adjustable overvoltage and undervoltage thresholds, reverse voltage protection, and a low quiescent current of just 20µA. The device is available in a compact 8-pin DFN package, which is ideal for space-sensitive applications. It also supports automotive temperature ranges (-40°C to 125°C), enhancing its suitability for harsh environments.

Application Areas

The LTC4368IDD-1#PBF is commonly used in industrial power supplies, automotive electronics, and telecommunications equipment. It is particularly effective in protecting sensitive circuits from voltage surges caused by load dumps, inductive load switching, or lightning strikes. In automotive applications, it safeguards infotainment systems, ECUs, and LED lighting from voltage transients. Industrial uses include protecting PLCs, motor drives, and instrumentation. The IC's reliability and performance also make it a preferred choice for battery-powered systems and portable devices where power integrity is crucial.

Maintenance and Precautions

To ensure optimal performance, the LTC4368IDD-1#PBF should be used within its specified operating conditions. Proper heat dissipation is essential, especially in high-current applications, to prevent thermal overload. The device should be handled with ESD precautions to avoid damage during installation. Regular testing of the protection circuitry is recommended to verify its responsiveness to overvoltage events. Designers should also ensure that the external MOSFET and other peripheral components are rated for the expected voltage and current levels. Following the manufacturer's layout guidelines can minimize noise and improve reliability.

B2B Procurement Guide

When procuring the LTC4368IDD-1#PBF, buyers should verify the authenticity of the product by sourcing from authorized distributors or reputable suppliers. Quantity discounts are commonly available, so bulk purchases can reduce per-unit costs. Lead times may vary depending on market demand, so planning ahead is advisable. Buyers should also confirm the device's package type and temperature grade to ensure compatibility with their application. For automotive or high-reliability applications, consider opting for automotive-grade variants with extended temperature ranges.