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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

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Preset VOUT
(V)		IOUT1
(A)		Output Adjust. MethodSwitch TypePower Good SignalSynchronous SwitchingICC
(mA)		Shutdown Mode Supply Current
(µA)		Shutdown Mode Supply Current
(µA)		DC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX1674 0.75.525.5
3.3
5
0.3
Preset
Resistor
InternalYesYes0.0160.111
UMAX/8
$1.94 @1k
MAX1675 
UMAX/8
$2.35 @1k
MAX1676 
UMAX/10
$2.20 @1k
See All Step-Up Switching Regulators (98)
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 Data

Product Reliability Reports: MAX1675.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

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

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Evaluation Board1879MAX1676EVKIT Evaluation Kit for the MAX1676