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MAX8667, MAX8668
1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables

Save Power and Board Space Using the Industry's First Dual Step-Down DC-DC Converters with Dual Low-Input LDOs


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Data Sheet
FULL DATA SHEET (PDF, 396kB)
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Description
The MAX8667/MAX8668 dual step-down converters with dual low-dropout (LDO) linear regulators are intended to power low-voltage microprocessors or DSPs in portable devices. They feature high efficiency with small external component size. The step-down converters are adjustable from 0.6V to 3.3V (MAX8668) or factory preset (MAX8667) with guaranteed output current of 600mA for OUT1 and 1200mA for OUT2. The 1.5MHz hysteretic-PWM control scheme allows for tiny external components and reduces no-load operating current to 100µA with all outputs enabled. Dual low-quiescent-current, low-noise LDOs operate down to 1.7V supply voltage. The MAX8667/MAX8668 have individual enables for each output, maximizing flexibility.

The MAX8667/MAX8668 are available in the space-saving, 3mm x 3mm, 16-pin thin QFN package.

Key Features   Applications/Uses
  • Tiny, Thin QFN 3mm x 3mm Package
  • Individual Enables
  • Step-Down Converters
    • 600mA Guaranteed Output Current on OUT1
    • 1200mA Guaranteed Output Current on OUT2
    • Tiny Size 2.2µH Chip Inductor (0805)
    • Output Voltage from 0.6V to 3.3V (MAX8668)
    • Ultra-Fast Line and Load Transients
    • Low 25µA Supply Current Each
  • LDOs
    • 300mA Guaranteed
    • Low 1.7V Minimum Supply Voltage
    • Low Output Noise

 
  • Cell Phones/Smartphones
  • Digital Cameras, Camcorders
  • Handheld Instruments
  • PCMCIA Cards
  • PDA and Palmtop Computers
  • Portable MP3 and DVD Players

    Key Specifications:   Multifunction PMICs
    Part Number Primary Topology Monitor/Control Features DC-DC/Power Features VIN (min) (V) VIN (max) (V) Min. VOUT (V) Max. VOUT (V) IOUT (A) IOUT (A) Operating Freq. (kHz) Package Price**
    MAX8667  Step-Down Shutdown Current Limit
    Fixed Freq./PWM
    Internal Pwr. FETs
    Soft Start
    Sync. Rectifier
    2.6 5.5 0.725 3.3 1.2 1.2 1500 THIN QFN/16 $2.95 @ 1k
    MAX8668  0.6 $2.95 @ 1k
    See All Multifunction PMICs (75)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX8667, MAX8668: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  • MAX8668EVKIT

    Design Guides
  • COMMUNICATIONS (PDF)
  • POWER MANAGEMENT FOR BATTERY-POWERED EQUIPMENT (PDF)

    Reliability Reports
  • 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: 1-28 of 28

    MAX8667 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8667ETEJS+T  



    -40°C to +85°C See data sheet
    MAX8667ETECQ+T  



    -40°C to +85°C See data sheet
    MAX8667ETEAA+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEJS+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEHR+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEHR+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETECQ+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEAC+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEAC+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEAB+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEAB+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8667ETEAA+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8668ETEX+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEV+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEV+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEU+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEU+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEQ+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEX+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEW+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEW+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETET+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETET+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEP+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEP+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEA+T  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEA+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8668ETEQ+  
    THIN QFN;16 pin;
    Dwg: 21-0136 (PDF)
    Use pkgcode/variation: T1633+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • Topmark Coding: MAX8667 MAX8668
  • New Product Press Release 2007-04-30 

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    Document Ref.: 19-0784; Rev 1; 2007-08-16
    This page last modified: 2007-09-28



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