LTC3728LEGN#TRPBF - Analog Devices Inc.

Manufacturer Part Number

LTC3728LEGN#TRPBF

Manufacturer

Analog Devices

Introduction

High-efficiency, dual-output, synchronous step-down DC-DC switching controller

Product Features and Performance

Synchronous rectification for improved efficiency

Two outputs with independent step-down channels

Programmable switching frequency from 260kHz to 550kHz

Maximum duty cycle of 99.4% for low dropout operation

Power Good output voltage monitor

Soft start capability to reduce inrush current

Enable pin for power sequencing

Product Advantages

High efficiency reduces thermal load and improves system reliability

Dual outputs enable compact design for systems requiring multiple regulated voltages

High frequency operation allows the use of small, low-cost inductors and capacitors

The capability for safe operation over a wide temperature range

Key Technical Parameters

Output Type: Transistor Driver

Function: Step-Down

Output Configuration: Positive

Topology: Buck

Number of Outputs: 2

Output Phases: 2

Voltage - Supply (Vcc/Vdd): 4.5V ~ 28V

Frequency - Switching: 260kHz ~ 550kHz

Duty Cycle (Max): 99.4%

Synchronous Rectifier: Yes

Operating Temperature: -40°C ~ 85°C (TA)

Package / Case: 28-SSOP

Quality and Safety Features

Wide operating temperature range for high reliability

Over-temperature protection

Compatibility

Compatible with a wide range of output inductors and capacitors

Surface mount SSOP-28 package for broad PCB compatibility

Application Areas

Distributed Power Systems

Telecommunications and Networking Infrastructure

Computing Systems

Industrial Equipment

Portable Devices

Product Lifecycle

Status: Active

Not currently near discontinuation with ongoing support and production

Several Key Reasons to Choose This Product

High integration with dual channels reducing overall solution footprint

Low minimum on-time allows for high step-down ratios

High levels of efficiency and thermal performance for demanding applications

Flexible design options with adjustable switching frequency

Stable operation with ceramic output capacitors

Built-in safety features including soft start and thermal protection for increased reliability