LTC1470CS8TRPBF

Updated: 2026-09-13

Overview

The LTC1470CS8TRPBF is a versatile DC-DC switching regulator IC manufactured by Linear Technology (now part of Analog Devices). It is housed in an SOIC-8 package, making it suitable for space-constrained applications. The device supports multiple topologies, including buck, boost, and inverting configurations, offering flexibility for diverse power supply designs. With an input voltage range typically spanning 2.5V to 16V, the LTC1470CS8TRPBF caters to a broad array of industrial and automotive systems. Its high efficiency (up to 90%) and low quiescent current (under 100µA) make it ideal for battery-powered or energy-sensitive applications.

Structure and Working Principle

The LTC1470CS8TRPBF integrates a current-mode PWM controller, power MOSFETs, and feedback circuitry into a single chip. It operates by switching the input voltage at high frequency (up to 500kHz) and filtering the output through an external inductor and capacitor network. Key internal components include an error amplifier, oscillator, and driver stages. The device adjusts duty cycle dynamically to maintain stable output voltage despite load or input variations. Users configure its operation mode (buck/boost/inverting) via external component selection and PCB layout.

Key Features

1) Wide 2.5V-16V input range accommodates diverse power sources. 2) Adjustable output voltage from 1.25V to 30V. 3) High switching frequency minimizes passive component sizes. 4) Built-in soft-start prevents inrush current issues. The regulator includes protection features such as current limiting and thermal shutdown. Its SOIC-8 package offers a compact footprint (5mm x 4mm) with exposed pad for enhanced thermal dissipation. The device operates across -40°C to +125°C, suiting harsh environments.

Application Areas

Industrial: Power modules for PLCs, sensors, and motor drives. Automotive: Infotainment systems, lighting controls, and battery management. Telecommunications: Base station power supplies and line cards. The LTC1470CS8TRPBF is also deployed in medical devices, test equipment, and portable electronics where efficient power conversion is critical. Its ability to generate both positive and negative outputs from single supplies makes it valuable for analog circuits requiring bipolar rails.

Maintenance and Precautions

1) Ensure adequate PCB copper area for heat dissipation, especially at full load. 2) Use low-ESR capacitors to maintain stability. 3) Keep high-current traces short to minimize EMI. Avoid exceeding absolute maximum ratings (20V input, 125°C junction temperature). For noise-sensitive applications, implement proper grounding and shielding. Regularly inspect for solder joint integrity in high-vibration environments like automotive systems.

B2B Procurement Guide

1) Specify required quantities and packaging (tape & reel standard). 2) Verify lead times - typically 8-12 weeks for non-stock items. 3) Request reliability data (MTBF >1 million hours). Authorized distributors like Arrow, Avnet, and Digi-Key provide genuine parts with traceability. Consider alternative part numbers (e.g., LTC1470CS8#PBF for tube packaging) if supply chain issues arise. For high-volume orders, negotiate pricing directly with Analog Devices representatives.