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Maxim > Products > [Power and Battery Management] 
MAX8640Y, MAX8640Z
Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters

Smallest 2mm x 2.1mm SC70 Package, the Industry's Smallest Total Solution Size, and Most Robust 4MHz/2MHz Step-Down DC-DC Converters on the Market that Can Deliver 500mA with Over 93% Efficiency


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 460kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX8640Y/MAX8640Z step-down converters are optimized for applications where small size, high efficiency, and low output ripple are priorities. They utilize a proprietary PWM control scheme that optimizes the switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing small 2.2µH and 4.7µF components. Output current is guaranteed up to 500mA, while typical quiescent current is 28µA. Factory-preset output voltages from 0.8V to 2.5V eliminate external feedback components.

Internal synchronous rectification greatly improves efficiency and replaces the external Schottky diode required in conventional step-down converters. Internal fast soft-start eliminates inrush current so as to reduce input capacitor requirements.

The MAX8640Y/MAX8640Z are available in the tiny 6-pin, SC70 (2.0mm x 2.1mm) and µDFN (1.5mm x 1.0mm) packages. Both packages are lead-free.

An evaluation kit is available:  MAX8640EVKIT  

Key Features   Applications/Uses
  • Tiny SC70 and µDFN Packages
  • 500mA Guaranteed Output Current
  • 4MHz or 2MHz PWM Switching Frequency
  • Tiny External Components: 1µH/2.2µF or 2.2µH/4.7µF
  • 28µA Quiescent Current
  • Factory Preset Outputs from 0.8V to 2.5V
  • ±1% Initial Accuracy
  • Low Output Ripple at All Loads
  • Ultrasonic Skip Mode Down to 1mA Loads
  • Ultra-Fast Line- and Load-Transient Response
  • Fast Soft-Start Eliminates Inrush Current

 
  		• Cell Phones, PDAs, DSCs, MP3s
  		• I/O Power
  		• Microprocessor/DSP Core Power
  		• Other Handhelds Where Space Is Limited

    Key Specifications:  Step-Down 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 Oper. Freq.
    (kHz)    		 Package/Pins Smallest Available Pckg.
    (mm2)    		 Price
    min max min max ≥ ≤ max w/pins See Notes
    MAX8640Y  2.7 5.5 1 2.5
    1
    1.1
    1.2
    1.3
    1.5
    1.8
    2.5
    		 0.5 0.5
    Preset
    Resistor
    		 1 2000
    µDFN/6
    SC70/6
    		 2 $1.87 @1k
    MAX8640Z  1.1 1.8
    1.1
    1.2
    1.3
    1.5
    1.8
    		 4000
    µDFN/6
    SC70/6
    		 $1.87 @1k
    See All Step-Down Switching Regulators (264)

    Diagram
    MAX8640Y, MAX8640Z: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  		• MAX8640EVKIT

    Design Guides
  		• Communications (PDF)
  		• Power Management for Battery-Powered Equipment (PDF)

    Reliability Reports
  		• Reliability Report: MAX8640Y.pdf MAX8640Z.pdf
  		• Show FIT data 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: 1-32 of 32

    MAX8640Y Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8640YELT12+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YELT18+  
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YELT18+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YELT15+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YELT82+  
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YELT82+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT13+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT13+  
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT25+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT12+  
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT12+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT18+  
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT18+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT16+  
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT16+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT15+  
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT15+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT19+  
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT19+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640YEXT19-T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8640Z Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8640ZELT12+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZELT12+  
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZELT18+  
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZELT18+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZEXT12-T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8640ZEXT18-T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8640ZEXT18+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZEXT25+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: X6S+1*
    		-40°C to +85°C See data sheet
    MAX8640ZEXT12+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZEXT15+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZEXT13+T    
    		Active SC70;6 pin;5 mm²
    Outline Drawing: 21-0077 (PDF)
    Land Pattern: 90-0189 (PDF)
    Use pkgcode/variation: X6SN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8640ZEXT19+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    More Information
  		• New Product Press Release 2007-01-10 
  		• Product Ad: Download

    Related Products
    MAX1920, MAX1921 Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23
    MAX8560, MAX8561, MAX8562 4MHz, 500mA Synchronous Step-Down DC-DC Converters in Thin SOT and TDFN

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    Document Ref.: 19-3997; Rev 4; 2009-03-16
    This page last modified: 2009-03-16


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