**LT3467AIDDB#TRPBF: A Comprehensive Technical Overview of the Monolithic Step-Up DC-DC Converter**

The **LT3467AIDDB#TRPBF** is a monolithic, fixed-frequency, step-up DC-DC converter from Analog Devices, designed to deliver high performance in a compact footprint. This integrated circuit (IC) is particularly engineered for applications requiring a regulated voltage higher than the input supply, making it a cornerstone component in modern portable electronics, display bias systems, and battery-powered equipment.

At its core, the LT3467 utilizes a **current mode PWM architecture** that provides excellent line and load regulation. Operating at a fixed switching frequency of **1.2MHz**, it allows for the use of extremely small surface-mount inductors and ceramic capacitors. This high-frequency operation is crucial for minimizing the overall solution size, a critical factor in space-constrained designs. The device can start up and operate with inputs as low as **2.5V** and can sustain operation down to **1.6V** after startup, making it exceptionally suitable for single and dual-cell alkaline or NiMH battery applications.

A key feature of this converter is its internal **1.5A, 36V NPN switch**. This robust integrated switch is capable of generating output voltages up to **34V**, providing significant step-up ratios from a low input voltage. The high switch current rating and voltage capability offer designers the flexibility to power a wide range of loads, including multiple series-connected LEDs, LCD panels, or photodiode arrays.

The LT3467 is packaged in an **8-lead DFN (2mm x 3mm)** package, exemplifying its commitment to high power density. The **LT3467AIDDB#TRPBF** part number specifically denotes the tape and reel packaging for high-volume automated assembly. Despite its miniature size, the IC incorporates essential protection features such as **soft-start** to mitigate inrush currents and frequency foldback for limiting inductor current under short-circuit conditions, enhancing system reliability.

Design simplicity is another hallmark of this converter. Typically, a complete regulated power supply requires only the IC, a switching inductor, a diode, and input/output capacitors. The internal compensation network further reduces the external component count, simplifying the design process and accelerating time to market.

**ICGOODFIND Summary**: The LT3467AIDDB#TRPBF stands out as a highly integrated, efficient, and compact solution for step-up DC-DC conversion. Its combination of a high-voltage, high-current switch, high switching frequency, and low minimum operating voltage makes it an indispensable component for powering advanced electronics from low-voltage sources.

**Keywords**: Step-Up DC-DC Converter, Monolithic IC, Current Mode PWM, 1.2MHz Switching Frequency, High Voltage Switch.