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Maxim > Products > [Power and Battery Management] 
MAX8581, MAX8582
2.5MHz/1.5MHz Step-Down Converters with 60mohm Bypass in TDFN for CDMA PA Power

Overall Smallest Solution 1.5MHz Step-Down DC-DC Converters Deliver 600mA with Up to 94% Efficiency in a Small TDFN Package


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 564kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX8581/MAX8582 high-frequency step-down converters are optimized for dynamically powering the power amplifier (PA) in CDMA handsets. They integrate a high-efficiency PWM step-down converter for medium- and low-power transmission and a 60m (typ) bypass mode to power the PA directly from the battery during high-power transmission. They use an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The MAX8581/MAX8582 use an internal feedback network, and the switching frequency is internally set to 2.5MHz and 1.5MHz, respectively.

Fast switching (up to 2.5MHz) and fast soft-start allowthe use of ceramic 2.2µF input and output capacitors while maintaining low voltage ripple. The small 1.5µH to 3.3µH inductor size can be optimized for efficiency.

The MAX8581/MAX8582 are available in 10-pin, 3mm x3mm TDFN packages (0.8mm max height).

An evaluation kit is available:  MAX8582EVKIT  

Key Features   Applications/Uses
  • 600mA Step-Down Converter
  • 60m (typ) Bypass Mode with Integrated FET
  • Dynamically Adjustable Output from 0.4V to VIN
  • 2.5MHz and 1.5MHz Switching Frequency
  • Small LC Components: 1.5µH to 3.3µH and 2.2µF
  • Up to 94% Efficiency
  • Low Output Ripple at All Loads
  • 2.7V to 5.5V Input
  • 0.1µA Shutdown Mode
  • Output Short-Circuit Protection
  • Thermal Shutdown
  • 10-Pin, 3mm x 3mm TDFN Packages

 
  		• WCDMA/NCDMA Cell Phones
  		• Wireless PDAs, Smartphones

    Key Specifications:  Step-Down Switching Regulators
    Part Number VIN
    (V)    		 VIN
    (V)    		 VOUT
    (V)    		 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
    MAX8581  2.7 5.5 0 5 0.6 0.6
    Dyn. REF In
    Resistor
    		 1 2500
    TDFN-EP/10
    		 10 $1.57 @1k
    MAX8582  1500
    TDFN-EP/10
    		 $1.57 @1k
    See All Step-Down Switching Regulators (264)

    Diagram
    MAX8581, MAX8582: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  		• MAX8582EVKIT

    Design Guides
  		• Communications (PDF)

    Reliability Reports
  		• Reliability Report: MAX8581.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: 1-4 of 4

    MAX8581 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8581ETB+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8581ETB+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8582 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8582ETB+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8582ETB+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX8581 MAX8582
  		• New Product Press Release 2006-11-09 

    Related Products
    MAX1920, MAX1921 Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-0593; Rev 1; 2007-03-05
    This page last modified: 2007-03-05


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