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Maxim > Products > [Power and Battery Management] 
MAX8716, MAX8717, MAX8756, MAX8757
Interleaved High-Efficiency, Dual Power-Supply Controllers for Notebook Computers

Dual, Step-Down, Interleaved, Fixed-Frequency, Switch-Mode Power-Supply (SMPS) Controllers with Synchronous Rectification for Notebook Computers


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 708kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX8716/MAX8717/MAX8756/MAX8757 are dual, step-down, interleaved, fixed-frequency, switch-mode power-supply (SMPS) controllers with synchronous rectification. The MAX8716/MAX8717/MAX8756/MAX8757 are intended for main (5V/3.3V) power generation, while the MAX8756 is optimized for I/O power rails in battery-powered systems.

Fixed-frequency operation with optimal interleaving minimizes input ripple current from the lowest input voltages up to the 26V maximum input. Optimal 40/60 interleaving allows the input voltage to go down to 8.3V before duty-cycle overlap occurs in 5V/3.3V applications, compared to 180° out-of-phase regulators where the duty-cycle overlap occurs when the input drops below 10V.

Accurate output current limit is achieved using a sense resistor. Alternatively, power dissipation can be reduced using lossless inductor current sensing. Independent ON/OFF controls and power-good signals allow flexible power sequencing. Soft-start reduces inrush current, while soft-stop gradually ramps the output voltage down preventing negative voltage dips.

A low-noise mode maintains high light-load efficiency while keeping the switching frequency out of the audible range.

The MAX8716 is available in a 24-pin thin QFN package, and the MAX8717/MAX8756/MAX8757 are available in a 28-pin thin QFN package.

An evaluation kit is available:  MAX8717EVKIT   MAX8716EVKIT  

Key Features   Applications/Uses
  • Fixed Switching Frequency
    • 200kHz, 300kHz, or 500kHz
    • 250kHz, 300kHz, or 400kHz (MAX8756 Only)
  • No Current-Sense Resistor Required
  • 40/60 Optimal Interleaving
  • Reduced Input-Capacitor Requirement
  • Output Voltage Fixed or Adjustable Outputs (Dual Mode™)
    • 3.3V/5V Fixed or 1V to 5.5V Adjustable
    • 1.5V/1.8V Fixed or 1V to 2.3V Adjustable (MAX8756 Only)
  • 4V to 26V Input Range
  • Independently Selectable PWM, Skip, and Low-Noise Mode Operation
  • Soft-Start and Soft-Stop
  • 2V Precision Reference with 0.75% Accuracy
  • Independent Power-Good Outputs

 
  		• 2 to 4 Li+ Cell Battery-Powered Devices
  		• Main or I/O Power Supplies
  		• Notebook and Subnotebook Computers
  		• PDAs and Mobile Communicators

    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
    MAX8716  4.5 26 1 5.5
    3.3
    5
    		 5 5
    Preset
    Resistor
    		 2 300
    TQFN/24
    		 17 -
    MAX8717  500
    TQFN/28
    		 26 $3.85 @1k
    MAX8757  500
    TQFN/28
    		 26 -
    See All Step-Down Switching Regulators (264)

    Diagram
    MAX8716, MAX8717, MAX8756, MAX8757: Standard Application Circuit
    Standard Application Circuit

    Evaluation Kits
  		• MAX8717EVKIT
  		• MAX8716EVKIT

    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: 1-13 of 13

    MAX8716 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8716ETG    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8716ETG+  
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8716ETG+T    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8716ETG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX8717 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8717ETI    
    		Active TQFN;28 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0026 (PDF)
    Use pkgcode/variation: T2855-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8717ETI+  
    		Active TQFN;28 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0026 (PDF)
    Use pkgcode/variation: T2855+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8717ETI+T    
    		Active TQFN;28 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0026 (PDF)
    Use pkgcode/variation: T2855+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8717ETI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX8756 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8756ETI+T    
    		Active TQFN;28 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0026 (PDF)
    Use pkgcode/variation: T2855+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8756ETI+  
    		Active TQFN;28 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0026 (PDF)
    Use pkgcode/variation: T2855+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8757 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8757ETI+    
    		Active TQFN;28 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0026 (PDF)
    Use pkgcode/variation: T2855+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8757ETI+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX8757ETG+    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    More Information
  		• New Product Press Release 2005-02-22 

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    Document Ref.: 19-3569; Rev 2; 2007-05-11
    This page last modified: 2009-09-23


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