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Maxim > Products > [Power and Battery Management] 
MAX8633, MAX8634, MAX8635, MAX8636
Dual 300mA Pin-Programmable Low-Dropout Linear Regulators with Reset or Low-Noise Output in a Tiny 2mm x 2mm µDFN Package

Industry's Smallest, Dual Low-Dropout Linear Regulators Designed for Low-Noise, Space-Sensitive Applications Where Flexibility and Integration are Necessary


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 292kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX8633–MAX8636 offer low-dropout (LDO) voltage and ultra-low-power regulation in a subminiaturized 2mm x 2mm µDFN package. The devices operate from a 2.7V to 5.5V supply and deliver up to 300mA from each output, with a typical dropout voltage of 90mV at 100mA load current. Each device is designed with internal p-channel MOSFET pass transistors to ensure a low-quiescent supply current of 54µA (typical, both LDOs on). Other features include low-noise operation (MAX8634/MAX8636), output current limiting, and thermal shutdown.

The MAX8633 features an open-drain, active-low RESET output to monitor OUT2, eliminating external components and adjustments. The MAX8633 asserts an active-low RESET signal (120ms minimum timeout) when VOUT2 drops below 87% of the nominal output voltage. The MAX8634/MAX8636 feature a noise bypass input to the internal reference for low output noise (45µVRMS typ). The MAX8634/MAX8635 provide independent active-low SHDN inputs for disabling the regulators, while the MAX8633/MAX8636 provide a single active-low SHDN input for disabling both regulators.

The MAX8633/MAX8635/MAX8636 have two logic inputs that select one of nine preset output-voltage combinations, eliminating external 1% resistors, as well as inventory burden. The MAX8634 has one logic input to select three output-voltage options.

The MAX8633–MAX8636 are available in an 8-pin, 2mm x 2mm µDFN package for minimizing footprint, and an 8-pin, 3mm x 3mm TDFN package for higher power dissipation. The devices are specified over the extended temperature range (-40°C to +85°C). All packages are lead free.

An evaluation kit is available:  MAX8633EVKIT  

Key Features   Applications/Uses
  • Pin-Programmable Output Voltages
  • 300mA Output Current
  • Low 90mV Dropout at 100mA Load
  • Open-Drain, Active-Low RESET (MAX8633)
  • Low 45µVRMS Output Noise (MAX8634/MAX8636)
  • Low 54µA Quiescent Supply Current
  • Low < 1µA Maximum Shutdown Current
  • Output Current Limit
  • Thermal Shutdown

 
  		• Cellular and Cordless Phones
  		• Handheld Instruments
  		• Notebook Computers
  		• PDAs and Digital Cameras
  		• Small LCD Displays
  		• Wireless LAN Cards

    Key Specifications:  Linear Regulators
    Part Number Regulators VIN
    (V)    		 VIN
    (V)    		 Preset VOUT
    (V)    		 VDROPOUT @Rated ILOAD
    (V)    		 Rated ILOAD
    (mA)    		 ICC
    (µA)    		 Low Batt./ Pwr. Fail Out POK/Reset Thresh.
    (V)    		 Watchdog Reverse Batt. Protect. Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    min max typ max nom max w/pins See Notes
    MAX8633  2 2.7 5.5 1.5 to 3.0 0.25 300 75 No Vout-13% No No
    µDFN/8
    TDFN-EP/8
    		 4 -40 to +85 $0.66 @1k
    MAX8634 
    2.6
    2.85
    3
    		 -
    µDFN/8
    TDFN-EP/8
    		 $0.63 @1k
    MAX8635  1.5 to 3.0 -
    µDFN/8
    TDFN-EP/8
    		 $0.63 @1k
    MAX8636  1.5 to 3.0 -
    µDFN/8
    TDFN-EP/8
    		 $0.63 @1k
    See All Linear Regulators (153)

    Diagram
    MAX8633, MAX8634, MAX8635, MAX8636: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  		• MAX8633EVKIT

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

    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: 1-14 of 14

    MAX8633 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8633ELA+T    
    		Active µDFN;8 pin;4 mm²
    Outline Drawing: 21-0164 (PDF)
    Land Pattern: 90-0005 (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8633ETA+  
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8633ETA+T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8634ELA+T    
    		Active µDFN;8 pin;4 mm²
    Outline Drawing: 21-0164 (PDF)
    Land Pattern: 90-0005 (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634ETA+  
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634ETA+T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8635ELA+T    
    		Active µDFN;8 pin;4 mm²
    Outline Drawing: 21-0164 (PDF)
    Land Pattern: 90-0005 (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635ETA+  
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635ETA+T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8636ELA+  
    		Active µDFN;8 pin;4 mm²
    Outline Drawing: 21-0164 (PDF)
    Land Pattern: 90-0005 (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ELA/V+T    
    		Active µDFN;8 pin;4 mm²
    Outline Drawing: 21-0164 (PDF)
    Land Pattern: 90-0005 (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ELA+T    
    		Active µDFN;8 pin;4 mm²
    Outline Drawing: 21-0164 (PDF)
    Land Pattern: 90-0005 (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ETA+  
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ETA+T    
    		Active TDFN-EP;8 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0059 (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX8633 MAX8634 MAX8635 MAX8636
  		• Product Ad: Download

    Related Products
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    MAX8882, MAX8883 Dual, Low-Noise, Low-Dropout, 160mA Linear Regulators in SOT23
    MAX8510, MAX8511, MAX8512 Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators

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     Description 
     Key Features 
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     Diagram 

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    Document Ref.: 19-0516; Rev 1; 2008-10-02
    This page last modified: 2009-05-04


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