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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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Data Sheet
FULL DATA SHEET (PDF, 292kB)
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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.

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 per Pkg. Min. VIN (V) Max. VIN (V) Preset VOUT (V) Typ. VDROPOUT@ Rated ILOAD (V) Rated ILOAD (mA) Max. ICC (µA) Low Battery/ Power Fail Output POK/ Reset Output POK/ Reset Output Type Nominal POK/Reset Threshold (V) Min. Reset Pulse Width (ms) Watchdog Reverse Battery Protection Package Operating Temp. Range (°C) Price**
    MAX8633  2 2.7 5.5 1.5 to 3.0 0.25 300 75 No Reset Push-Pull Active Low Vout-13% 120 No No MicroDFN/8
    THIN QFN (Dual)/8     		-40 to +85 $0.66 @ 1k
    MAX8634  2.6
    2.85
    3.0     		No  -   -   -  $0.63 @ 1k
    MAX8635  1.5 to 3.0 No  -   -   -  $0.63 @ 1k
    MAX8636  1.5 to 3.0 No  -   -   -  $0.63 @ 1k
    See All Linear Regulators (141)
    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
    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: 1-17 of 17

    MAX8633 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8633ELA+  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8633ELA+T  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8633ETA+  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8633ETA+T  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8634ELA+  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634ELA+T  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634ETA+  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8634ETA+T  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8635ELA+  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635ELA+T  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635ETA+  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8635ETA+T  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8636ELA/V+T  



    		-40°C to +85°C See data sheet
    MAX8636ELA+  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ELA+T  
    		MicroDFN;8 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L822+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ETA+  
    		TDFN;8 pin;
    Dwg: 21-0137I (PDF)
    Use pkgcode/variation: T833+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8636ETA+T  
    		TDFN;8 pin;
    Dwg: 21-0137I (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
    MAX8867, MAX8868 Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23
    MAX8877, MAX8878 Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
    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 
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    Document Ref.: 19-0516; Rev 1; 2008-10-02
    This page last modified: 2008-10-02




             


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