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MAX5035

MAX5035

1A, 76V, High-Efficiency MAXPower Step-Down DC-DC Converter

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Overview

Description

The MAX5035 easy-to-use, high-efficiency, high-voltage, step-down DC-DC converter operates from an input voltage up to 76V and consumes only 270µA quiescent current at no load. This pulse-width modulated (PWM) converter operates at a fixed 125kHz switching frequency at heavy loads, and automatically switches to pulse-skipping mode to provide low quiescent current and high efficiency at light loads. The MAX5035 includes internal frequency compensation simplifying circuit implementation. The device uses an internal low-on-resistance, high-voltage, DMOS transistor to obtain high efficiency and reduce overall system cost. This device includes undervoltage lockout, cycle-by-cycle current limit, hiccup mode output short-circuit protection, and thermal shutdown.

The MAX5035 delivers up to 1A output current. The output current may be limited by the maximum power dissipation capability of the package. External shutdown is included, featuring 10µA (typ) shutdown current. The MAX5035A/B/C versions have fixed output voltages of 3.3V, 5V, and 12V, respectively, while the MAX5035D/E versions have an adjustable output voltage from 1.25V to 13.2V.

The MAX5035 is available in space-saving 8-pin SO and 8-pin plastic DIP packages and operates over the automotive (-40°C to +125°C) temperature range.
MAX5035: Typical Operating Circuit MAX5035: Typical Operating Circuit Enlarge+

Key Features

  • Wide 7.5V to 76V Input Voltage Range
  • Fixed (3.3V, 5V, 12V) and Adjustable (1.25V to 13.2V) Versions
  • 1A Output Current
  • Efficiency Up to 94%
  • Internal 0.4Ω High-Side DMOS FET
  • 350µA Quiescent Current at No Load, 10µA Shutdown Current
  • Internal Frequency Compensation
  • Fixed 125kHz Switching Frequency
  • Thermal Shutdown and Short-Circuit Current Limit
  • 8-Pin SO and PDIP Packages

Applications/Uses

  • Automotive
  • Consumer Electronics
  • Distributed Power
  • Industrial

Parametric Specs

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Preset VOUT
(V)		Output Adjust. MethodIOUT1
(A)		Switch TypeDC-DC OutputsOper. Freq.
(kHz)		Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX5035 7.5761.2513.2
3.3
5
12
Preset
Resistor
1Internal1125
PDIP/8
SOIC (N)/8
$1.89 @1k
See All Step-Down Switching Regulators (404)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources


MAX5035EVKIT: MAX5035 Evaluation Kit

Technical Documents

User Guide 5861 EE-SIM Design and Simulation Environment User Guide
Tutorial 4701 Introduction to Programmable Logic Controllers (PLCs) and the Operational Function of Main System Modules
App Note 4413 Sequencing Circuit Provides Pseudo Voltage Tracker
Tutorial 3740 How to Generate Auxiliary Supplies from a Positive Buck DC-DC Converter
App Note 3668 High-Efficiency Current Drive for High-Brightness LEDs

Quality and Environmental Data

Product Reliability Reports: MAX5035.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • MAX5035_FR Test Circuit File
  • MAX5035_TR1 Test Circuit File
  • MAX5035_TR2 Test Circuit File
  • MAX5035_TR Test Circuit File
  • MAX5035_FR1 Test Circuit File
  • MAX5035_FR2 Test Circuit File
  • MAX5035 Orcad Library
  • MAX5035 Macromodel

    •

    Quality And Environmental

    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

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    Reference Designs

    Type ID Title
    Evaluation Board4131MAX5035EVKIT MAX5035 Evaluation Kit