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Maxim > Products > [Power and Battery Management] 
MAX1674, MAX1675, MAX1676
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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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 536kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

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 0.3 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.

An evaluation kit is available:  MAX1676EVKIT  

Key Features   Applications/Uses
  • 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)

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

    Key Specifications:  Step-Up Switching Regulators
    Part Number VIN
    (V)    		 VIN
    (V)    		 VOUT
    (V)    		 VOUT
    (V)    		 Preset VOUT
    (V)    		 Max. IOUT
    (A)    		 Max. IOUT
    (A)    		 Output Adjust. Method DC-DC Outputs Package/Pins Smallest Available Pckg.
    (mm2)    		 Price
    min max min max ≥ ≤ max w/pins See Notes
    MAX1674  0.7 5.5 2 5.5
    3.3
    5
    		 0.3 0.3
    Preset
    Resistor
    		 1
    µMAX/8
    		 16 $1.85 @1k
    MAX1675 
    µMAX/8
    		 16 $1.85 @1k
    MAX1676 
    µMAX/10
    		 15 $1.99 @1k
    See All Step-Up Switching Regulators (92)

    Diagram
    MAX1674, MAX1675, MAX1676: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 2018: Protection From Blackouts: Dirt Cheap to Fully Integrated - MAX1674
  		• Application Note 3209: Protecting Against Momentary Power Loss Due to Battery-Bounce - MAX1674

    Evaluation Kits
  		• MAX1676EVKIT

    Reliability Reports
  		• Reliability Report: MAX1674.pdf MAX1675.pdf
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-12 of 12

    MAX1674 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1674EUA    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1674EUA-T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1674EUA+  
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1674EUA+T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1675 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1675EUA    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1675EUA-T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1675EUA+  
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1675EUA+T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1676 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1676EUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1676EUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1676EUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1676EUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
    • MAX1674 has 1A current limit. MAX1675 has 0.5A current limit. MAX1676 has adjustable current limit. Low quiescent current

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    Document Ref.: 19-1360; Rev 3; 2000-03-01
    This page last modified: 2007-06-01


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