Maxim > Design Support > Technical Documents > Reference Designs > Medical > APP 5512

Maxim > Design Support > Technical Documents > Reference Designs > Power-Supply Circuits > APP 5512

Maxim > Design Support > Technical Documents > Reference Designs > Protection and Isolation > APP 5512

power, halo, transformer, riverside, maxrefdes8, industrial, power

REFERENCE DESIGN 5512 INCLUDES:

Tested Circuit

Schematic

BOM

Description

Test Data

Layout

Riverside (MAXREFDES8#): 3.3V Input, 12V (15V)

Output Isolated Power Supply

Nov 06, 2012

Abstract: This document details the Riverside (MAXREFDES8#) subsystem reference design, a 3.3V input, 12V

(15V) output isolated power supply. The Riverside reference design includes a 3W primary-side transformer H-

bridge driver for isolated supplies, and one wide input range and adjustable output low dropout (LDO) linear

regulator. Test results and hardware files are included.

Introduction

The Riverside design (MAXREFDES8#) uses an H-bridge

transformer driver (MAX256) and a low dropout (LDO) linear

regulator (MAX1659) to create a 12V (15V) output isolated

power supply from a 3.3V voltage input (Figure 1). This

general-purpose power solution can be used in many different

types of isolated power applications, but is mainly targeted for

industrial sensors, industrial automation, process control, and

medical applications.

More detailed image (JPG)

Figure 1. The Riverside subsystem design block diagram.

Features

Applications

Isolated power

12V (15V) output

Small printed circuit board (PCB) area

Pmod™-compatible form factor

Industrial sensors

Process control

Industrial automation

Medical

Detailed Description of Hardware

The Riverside subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge

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