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MAX1675

MAX1675

High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters

Compact, Low-Cost, Low-Noise Design: Inductor Damping Switch Eliminates Ringing, Improves EMI

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Overview

Description

The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small µMAX packages. They feature a built-in synchronous rectifier, which improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. Quiescent supply current is only 16µA.

The input voltage ranges from 0.7V to VOUT, where VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The MAX1674/MAX1675/MAX1676 have a preset, pin-selectable output for 5V or 3.3V. The outputs can also be adjusted to other voltages using two external resistors.

All three devices have a 0.3Ω N-channel MOSFET power switch. The MAX1674 has a 1A current limit. The MAX1675 has a 0.5A current limit, which permits the use of a smaller inductor. The MAX1676 comes in a 10-pin µMAX package and features an adjustable current limit and circuitry to reduce inductor ringing.

MAX1674, MAX1675, MAX1676: Typical Operating Circuit MAX1674, MAX1675, MAX1676: Typical Operating Circuit Enlarge+

Key Features

  • 94% Efficient at 200mA Output Current
  • 16µA Quiescent Supply Current
  • Internal Synchronous Rectifier (no external diode)
  • 0.1µA Logic-Controlled Shutdown
  • LBI/LBO Low-Battery Detector
  • Selectable Current Limit for Reduced Ripple
  • Low-Noise, Anti-Ringing Feature (MAX1676)
  • 8-Pin and 10-Pin µMAX Packages
  • Preassembled Evaluation Kit (MAX1676EVKIT)

Applications/Uses

  • 1- to 3-Cell Handheld Devices
  • Handheld Computers
  • Medical Devices
  • Pagers
  • PDAs
  • RF Tags
  • Wireless Phones

Parametric Specs

See parametric specs for Step-Up Switching Regulators (102)


Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		IOUT1
(A)		Switch Type
minmaxminmaxmax
MAX1674 0.75.525.50.3Internal
MAX1675 
MAX1676 

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


MAX1676EVKIT: Evaluation Kit for the MAX1676

Technical Documents

Tutorial 751 Linear Regulators in Portable Applications

Quality And Environmental

Product Reliability Reports: MAX1675.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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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Technical Docs

Type ID Title
Tutorial 751 Linear Regulators in Portable Applications

Reference Designs

Type ID Title
Evaluation Board1879MAX1676EVKIT Evaluation Kit for the MAX1676
Evaluation Board1879MAX1676_EVKIT Evaluation Kit for the MAX1676