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MAX1553, MAX1554
High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs

Smallest, Highest Efficiency, 40V Driver for Up to 10 White LEDs


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 332kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1553/MAX1554 drive white LEDs in series with a constant current to provide efficient display backlighting in cellular phones, PDAs, and other hand-held devices. The step-up converter includes an internal 40V, low RDSON, N-channel MOSFET switch for high efficiency and maximum battery life. The MAX1553 has a current limit of 480mA for driving two to six white LEDs, while the MAX1554 has a current limit of 970mA for driving up to 10 white LEDs.

A single analog/PWM Dual Mode™ input provides two simple means of brightness adjustment. A separate enable input provides on/off control. Soft-start minimizes inrush current during startup.

The MAX1553/MAX1554 are available in space-saving 8-pin TDFN 3mm x 3mm packages.

An evaluation kit is available:  MAX1553EVKIT  

Key Features   Applications/Uses
  • Constant-Current Regulation for Even LED Illumination
  • Internal 40V MOSFET Switch Capable of Driving 10 LEDs
  • Small, Low-Profile External Components
  • 2.7V to 5.5V Input Range
  • Up to 88% Efficiency Driving 6 LEDs
  • Up to 82% Efficiency Driving 9 LEDs (20mA, VCC = 3.6V)
  • Analog or PWM Control of LED Intensity
  • Optimized for Low Input Ripple
  • Soft-Start to Minimize Inrush Current
  • 3mm x 3mm 8-Pin TDFN Package

 
  		• Cell Phones
  		• Color Display Backlight
  		• PDA, Palmtop, and Wireless Handhelds

    Key Specifications:  White LED Drivers
    Part Number Topology LEDs Config. Dimming Control VCURR_SENSE
    (mV)    		 POUT
    (W)    		 ILED
    (mA)    		 VIN
    (V)    		 VIN
    (V)    		 ICC
    (mA)    		 VOUT
    (V)    		 Package/Pins Price
    max num. of max min max max max See Notes
    MAX1553  Inductor Based 6 Series
    Analog
    PWM
    		 200 0.5 20 2.7 5.5 0.35 40
    TDFN-EP/8
    		 $1.25 @1k
    MAX1554  10 0.8 0.65
    TDFN-EP/8
    		 $1.35 @1k
    See All White LED Drivers (46)

    Diagram
    MAX1553, MAX1554: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 4025: DACs vs. Digital Potentiometers: Which Is Right for My Application? - MAX1553

    Evaluation Kits
  		• MAX1553EVKIT

    Design Guides
  		• 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: 1-7 of 7

    MAX1553 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1553ETA+  
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1553ETA-T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1553ETA+T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1554 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1554ETA+  
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1554ETA    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1554ETA-T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1554ETA+T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX1553 MAX1554
  		• New Product Press Release 2003-06-26 

    Related Products
    MAX1848 White LED Step-Up Converter in SOT23
    MAX1561, MAX1599 High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs

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     Description 
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     Diagram 

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    Document Ref.: 19-2875; Rev 1; 2004-02-05
    This page last modified: 2007-08-10


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