ENGLISH 简体中文 日本語 한국어  

    Login | Register 


   
 
Enter keywords or part number    



MAX1573
White LED 1x/1.5x Charge Pump in UCSP and Thin QFN

Smallest, Highest Efficiency White LED Charge Pump Packaged in a UCSP™


  QuickView     Technical Documents     Ordering Info     More Information     User Comments (0)     All  
Data Sheet
FULL DATA SHEET (PDF, 268kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail


Description
The MAX1573 fractional charge pump drives up to four white LEDs with regulated constant current for uniform intensity. By utilizing proprietary adaptive 1x/1.5x modes and ultra-low-dropout current regulators, it maintains the highest possible efficiency over the full 1-cell Li+ battery input voltage range. The 1MHz fixed-frequency switching allows for tiny external components and the regulation scheme is optimized to ensure low EMI and low input ripple.

An external resistor sets the full-scale LED current, while two digital inputs control on/off and select amongst three levels of brightness. A pulse-width modulation (PWM) signal can also be used to modulate LED brightness, requiring no additional components.

The MAX1573 is available in the tiny chip-scale UCSP™ (4 x 4 grid) and 16-pin thin QFN packages.

Key Features   Applications/Uses
  • Proprietary Adaptive 1x/1.5x Modes
  • High Efficiency (PLEDs/PBATT), Up to 92%
  • 0.2% LED Current Matching
  • 28mA/LED Drive Capability
  • Low Input Ripple and EMI
  • Eliminates Ballast Resistors
  • Logic or PWM Dimming Control
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Input Voltage Range
  • Soft-Start Limits Inrush Current
  • Output Overvoltage Protection
  • Thermal Shutdown Protection
  • No External Schottky Diode Required
  • Tiny UCSP (2.1mm x 2.1mm x 0.6mm) and Thin QFN (4mm x 4mm) Packages

 
  • Cell Phones/Smartphones
  • MP3 Players
  • Other Handhelds with Color Displays
  • PDAs, Digital Cameras, and Camcorders

    Diagram
    MAX1573: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  • Application Note 3243: White-LED Boost Converter vs. Charge Pump - MAX1573
  • Application Note 3287: White-LED Driver Provides 64-Step Logarithmic Dimming - MAX1573

    Evaluation Kits
  • MAX1573EVKIT

    Design Guides
  • Battery Management (PDF)
  • Displays (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: 1-7 of 7

    MAX1573 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1573TQFNEVKIT    


    Land Pattern: Not Available

    See data sheet
    MAX1573ETE+T  
    TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1573ETE+  
    TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1573ETE  
    TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1573ETE-T  
    TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1573EBE  
    UCSP;14 pin;4 mm²
    Outline Drawing: 21-0101 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: B16-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1573EBE-T    
    UCSP;14 pin;4 mm²
    Outline Drawing: 21-0101 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: B16-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    More Information
  • New Product Press Release 2003-05-05 

    Didn't Find What You Need?
  • Next Day Product Selection Assistance from Applications Engineers
  • Parametric Search
  • Applications Help
  •  QuickView   Technical Documents   Ordering Info   More Information  
     Description 
     Key Features 
     Applications/Uses 
     Key Specifications 
     Diagram 

     Data Sheet 
     Application Notes 
     Design Guides 
     Engineering Journals 
     Reliability Reports 
     Software/Models 
     Evaluation Kits 

     Price and Availability 
     Samples 
     Buy Online 
     Package Information 
     Lead-Free Information 

     Related Products 
     Notes and Comments 
     Evaluation Kits 

    Document Ref.: 19-2847; Rev 2; 2005-09-20
    This page last modified: 2007-08-08


            •         •         •     Privacy Policy     •     Legal Notices

        Copyright © 2009 by Maxim Integrated Products