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FAN2011
High-efficiency step-down DC/DC converter

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Contents

General Description
Features
Applications
Product Status/Pricing/Packaging
Order Samples
Application Notes
Qualification Support

General Description

The FAN2011/FAN2012 is a high-efficiency, low-noise synchronous Pulse Width Modulated (PWM) current mode DC-DC converter, designed for low voltage applications. It provides up to 1.5A continuous load current from the 4.5V to 5.5V input. The output voltage is adjustable over a wide range of 0.8V to VIN by means of an external voltage divider.

The FAN2011 is always on, while the FAN2012 has an "Enable Input," and the device can be put in the shutdown mode, in which the ground current falls below 1µA.

A current mode control loop with a fast transient response ensures excellent line and load regulation. The fixed 1.3MHz switching frequency enables the user to choose a small, inexpensive external inductor and capacitor. Filtering is also easily accomplished with very small components.

Protection features include input under-voltage lockout, short circuit protection and thermal shutdown. Soft-start limits in-rush current during start-up conditions.

The device is available in a 3x3mm 6-lead MLP package, making it possible to build a 1.5A complete DC/DC converter in a tiny space on the PCB.

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Features

  • 95% Efficiency, Synchronous Operation
  • Adjustable Output Voltage from 0.8V to VIN
  • 4.5V to 5.5V Input Voltage Range
  • Up to 1.5A Output Current
  • Fixed Frequency 1.3 MHz PWM Operation
  • 100% Duty Cycle Low Dropout Operation
  • Soft Start
  • Excellent Load Transient Response
  • 3x3mm 6-lead MLP Package

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Applications

  • Hard Disk Drive
  • Set Top Box
  • Point of Load Power
  • Notebook Computers
  • Communications Equipment

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Datasheet
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Product Status/Pricing/Packaging      buy now

ProductProduct statusEco StatusPricing*Package typeLeadsPacking methodPackage DrawingPackage Marking Convention**
FAN2011EMPXFull ProductionGreen$0.74MLP6TAPE REEL PDFLine 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: 2011E Line 3: C
FAN2011MPXFull ProductionGreen$0.71MLP6TAPE REEL PDFLine 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: 2011 Line 3: C
* Fairchild 1,000 piece Budgetary Pricing
** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Package marking information for product FAN2011 is available. Click here for more information .

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Application Notes

AN-42036: PCB Grounding System and FAN2001/FAN2011 High Performance DC-DC Converters (143 K) Nov 28, 2008
AN-6011: FAN2011 Family Component calculation and simulation tools (301 K) Nov 28, 2008
AN-6053: AN-6053 FAN20LV03 Component Calculation and Simulation Tools (169 K) Nov 28, 2008
 

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Qualification Support

Click on a product for detailed qualification data

Product
FAN2011EMPX
FAN2011MPX

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