ENGLISH 简体中文 日本語 한국어  

    Login | Register 


   
 
Enter keywords or part number    



MAX1534, MAX1534ETE
High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers

High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers


  QuickView     Technical Documents     Ordering Info     More Information     User Comments (0)     All  
Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 404kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail


Description
The MAX1534 is a high-efficiency, triple-output power supply for keep-alive (always on) voltage rails. The 500mA buck regulator with an internal current-limited 0.5Ω PMOS steps down the battery or wall adapter supply rail to a fixed 5V or an adjustable output voltage. Two integrated low-voltage linear regulators follow this output and provide two independent preset output voltages of 3.3V and 1.8V, or adjustable output voltages.

The buck regulator utilizes a peak current-limit, pulse-frequency modulation (PFM) architecture for highest light-load efficiency to conserve battery life. High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. Operation to 100% duty cycle minimizes dropout voltage (250mV at 500mA).

The low-dropout linear regulators use an internal P-channel metal-oxide (PMOS) pass transistor to minimize supply current and deliver up to 160mA each of continuous current.

The MAX1534 includes a power-OK (POK) signal that indicates all outputs are in regulation. The 4% accurate threshold of the active-low SHDN input permits its use as a low-battery detector.

The MAX1534 is available in a small 16-pin thin QFN (4mm x 4mm) package, occupying 33% less board space than discrete solutions.

An evaluation kit is available:  MAX1534EVKIT  

Key Features   Applications/Uses
  • One Switching and Two Linear Regulators
  • Switching Regulator
    • +4.5V to +24V Input Voltage Range
    • Over 95% Efficiency
    • Up to 500mA Output Current
    • Up to 200kHz Switching Frequency
    • Fixed 5V or Adjustable Output Voltage
    • Internal 0.5Ω PMOS Switch
    • 100% Maximum Duty Cycle for Low-Dropout Operation
  • Two Low-Dropout Linear Regulators
    • Up to 160mA Output Current (Each)
    • 3.3V/Adj Output Voltage for OUT1
    • 1.8V/Adj Output Voltage for OUT2
  • ±1.5% Accurate Output Voltage
  • ±4% Accurate Shutdown for Low Battery Detection
  • Thermal Shutdown Protection
  • POK Output
  • 1mW Typical Standby Power

 
  • 2 to 4 Li+ Cell Battery-Powered Devices
  • Handheld Devices
  • Keep-Alive Supplies
  • Notebook and Subnotebook Computers
  • Standby Supplies
  • Wake On LAN®

    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
    MAX1534  4.5 24 1 5.5
    1.8
    3.3
    5
    0.3 0.3
    Preset
    Resistor
    1 200
    TQFN/16
    16.8 $2.90 @1k
    See All Step-Down Switching Regulators (264)

    Diagram
    MAX1534: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  • MAX1534EVKIT

    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: 1-4 of 4

    MAX1534ETE Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1534ETE    
    Active TQFN;16 pin;16.8 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
    MAX1534ETE-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX1534ETE+  
    Active TQFN;16 pin;16.8 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
    MAX1534ETE+T    
    Active TQFN;16 pin;16.8 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

    More Information
  • New Product Press Release 2002-12-05 

    Related Products
    MAX1776 24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter

    More Like This: View Product Families for Similar Products

    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.: 19-2662; Rev 0; 2002-12-20
    This page last modified: 2007-08-02


            •         •         •     Privacy Policy     •     Legal Notices

        Copyright © 2009 by Maxim Integrated Products