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Maxim > Products > [Power and Battery Management] 
MAX1714, MAX1714A, MAX1714B
High-Speed Step-Down Controller for Notebook Computers

Low-Cost, Ultra-Fast, 1%-Accurate Controllers Power Next-Generation Notebook CPU Core and I/O


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 896kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chip-set/RAM supplies in notebook computers.

Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency.

The MAX1714 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs.

Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.

The MAX1714 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715 data sheet.

An evaluation kit is available:  MAX1714AEVKIT   MAX1714BEVKIT  

Key Features   Applications/Uses
  • Ultra-High Efficiency
  • No Current-Sense Resistor (Lossless ILIMIT)
  • Quick-PWM with 100ns Load-Step Response
  • 1% VOUT Accuracy Over Line and Load
  • 2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range
  • 2V to 28V Battery Input Range
  • 200/300/450/600kHz Switching Frequency
  • Overvoltage Protection (MAX1714A)
  • Undervoltage Protection
  • 1.7ms Digital Soft-Start
  • Drives Large Synchronous-Rectifier FETs
  • 2V ±1% Reference Output
  • Power-Good Indicator

 
  		• 1.8V and 2.5V I/O Supplies
  		• Chipset/RAM Supplies as Low as 1V
  		• CPU Core Supplies
  		• Notebook Computers

    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
    MAX1714A  2 28 1 5.5
    2.5
    3.3
    		 8 8
    Preset
    Resistor
    		 1 600
    QSOP/16
    QSOP/20
    		 31 $2.43 @1k
    MAX1714B 
    QSOP/16
    QSOP/20
    		 $2.43 @1k
    See All Step-Down Switching Regulators (264)

    Diagram
    MAX1714, MAX1714A, MAX1714B: Minimal Operating Circuit
    Minimal Operating Circuit

    Application Notes
  		• Application Note 3753: Thermistor Linearizes Current Limit - MAX1714

    Evaluation Kits
  		• MAX1714AEVKIT
  		• MAX1714BEVKIT

    Reliability Reports
  		• Reliability Report: MAX1714.pdf MAX1714A.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: 1-8 of 8

    MAX1714A Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1714AEEP    
    		Active QSOP;20 pin;54 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0168 (PDF)
    Use pkgcode/variation: E20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1714AEEP-T    
    		Active QSOP;20 pin;54 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0168 (PDF)
    Use pkgcode/variation: E20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1714AEEP+  
    		Active QSOP;20 pin;54 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0168 (PDF)
    Use pkgcode/variation: E20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1714AEEP+T    
    		Active QSOP;20 pin;54 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0168 (PDF)
    Use pkgcode/variation: E20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1714B Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1714BEEE    
    		Active QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1714BEEE-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1714BEEE+  
    		Active QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1714BEEE+T    
    		Active QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
  		• Power Good Indicator, 2V ±1% Reference Output, Drives Large Synchronous Rectifier FETs

    More Information
  		• New Product Press Release 1999-11-05 

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    Document Ref.: 19-1536; Rev 2; 2005-09-16
    This page last modified: 2007-06-04


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