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Maxim > Products > [Power and Battery Management] 
MAX1818
500mA, Low-Dropout Linear Regulator in SOT23


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Data Sheet
FULL DATA SHEET (PDF, 204kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1818 low-dropout linear regulator operates from a +2.5V to +5.5V supply and delivers a guaranteed 500mA load current with low 120mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see Selector Guide in the full data sheet) or can be adjusted from 1.25V to 5.0V with an external resistive divider.

An internal PMOS pass transistor allows the low 125µA supply current to remain independent of load, making this device ideal for portable battery-operated equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, base stations, and notebook computers.

Other features include an active-low open-drain reset output that indicates when the output is out of regulation, a 0.1µA shutdown, short-circuit protection, and thermal shutdown protection. The device is available in a miniature 800mW 6-pin SOT23 package.

Key Features   Applications/Uses
  • Guaranteed 500mA Output Current
  • Low 120mV Dropout at 500mA
  • ±1% Output Voltage Accuracy
    • Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V, 5V
    • Adjustable from 1.25V to 5.0V
  • Power OK Output
  • Low 125µA Ground Current
  • 0.1µA Shutdown Current
  • Thermal Overload Protection
  • Output Current Limit
  • Tiny 800mW 6-Pin SOT23 Package

 
  		• Cell Phones/Cordless Phones
  		• Docking Stations
  		• Notebook Computers
  		• Palmtop Computers
  		• PDAs and Other Handheld Devices
  		• USB Hubs
  		• Wireless Base Stations

    Key Specifications:   Linear Regulators
    Part Number Regulators per Pkg. Min. VIN (V) Max. VIN (V) Preset VOUT (V) Min. Adjustable VOUT (V) Max. Adjustable VOUT (V) Typ. VDROPOUT@ Rated ILOAD (V) Rated ILOAD (mA) Max. ICC (µA) Low Battery/ Power Fail Output Nominal POK/Reset Threshold (V) Watchdog Reverse Battery Protection Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX1818  1 2.5 5.5 1.5
    1.8
    2.0
    2.5
    3.3
    5.0     		1.25 5 0.12 500 250 No Vout-7% No No SOT/6 9 -40 to +85 $1.15 @ 1k
    See All Linear Regulators (145)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX1818: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 4404: Using a Linear Regulator to Produce a Constant Current Source - MAX1818

    Evaluation Kits
  		• MAX1818EVKIT

    Design Guides
  		• Power Management for Battery-Powered Equipment (PDF)

    Reliability Reports
  		• Reliability Report: MAX1818.pdf
  		• Show FIT data 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: 1-29 of 29

    MAX1818 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1818EUT25#T    


    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1818EUT33+T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F+6*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX1818EUT33#TG16    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT50#TG16    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT18-TG05    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT15-TG077    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT18#G16  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT33#G16  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT15#G16  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT50#G16  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT20#G16  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT25#  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT25#G16  
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT25#TG16    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT20#TG16    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT18#TG16    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT15#TG16    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: U6FH-6*
    		-40°C to +85°C RoHS/Lead-Free: RoHS Qualified
    Materials Analysis
    MAX1818EUT15    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT18    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT20    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT25    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT33    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT50    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT50-T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT33-T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT25-T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT20-T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT18-T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1818EUT15-T    
    		SOT;6 pin;9 mm²
    Outline Drawing: 21-0058 (PDF)
    Land Pattern: 90-0175 (PDF)
    Use pkgcode/variation: U6F-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

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    •  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 
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    Document Ref.: 19-1860; Rev 2; 2008-06-19
    This page last modified: 2008-06-19


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