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Maxim > Products > Power and Battery Management 
MAX1722, MAX1723, MAX1724
1.5µA IQ, Step-Up DC-DC Converters in Thin SOT23-5


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Data Sheet
FULL DATA SHEET (PDF, 304kB)
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Description
The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are available in tiny, 5-pin thin SOT23 packages. They feature an extremely low 1.5µA quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metal-hydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical.

Built-in synchronous rectification significantly improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. All three devices feature a 0.5Ω N-channel power switch. The MAX1722/MAX1724 also feature proprietary noise-reduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed or adjustable outputs, shutdown, and EMI reduction (see Selector Guide).

Key Features   Applications/Uses
  • Up to 90% Efficiency
  • No External Diode or FETs Needed
  • 1.5µA Quiescent Supply Current
  • 0.1µA Logic-Controlled Shutdown
  • ±1% Output Voltage Accuracy
  • Fixed Output Voltage (MAX1724) or Adjustable Output Voltage (MAX1722/MAX1723)
  • Up to 150mA Output Current
  • 0.8V to 5.5V Input Voltage Range
  • 0.91V Guaranteed Startup (MAX1722/MAX1724)
  • Internal EMI Suppression (MAX1722/MAX1724)
  • Thin SOT23-5 Package (1.1mm max Height)

 
  		• Digital Still Cameras
  		• Low-Power Handheld Instruments
  		• MP3 Players
  		• Pagers
  		• PDAs and Other Handheld Devices
  		• Personal Medical Devices
  		• Remote Controls
  		• Remote Wireless Transmitters
  		• Single-Cell Battery-Powered Devices

    Key Specifications:   Switch-Mode DC-DC Power Supplies
    Part Number Topology VIN (min) (V) VIN (max) (V) Number of DC-DC Outputs Preset VOUT (V) Digital/VID Programmed Output Min. Adjustable VOUT (V) Max. Adjustable VOUT (V) IOUT (A) Operating Current, ICC (max) (mA) Fixed Freq/PWM Operation Internal Power Switch(es) Synchronous Rectifier Package Smallest Available Package (max w/pins) (mm2) Price**
    MAX1722  Step-Up 0.8 5.5 1  -  No 2 5.5 0.15 0.0035 No Yes Yes SOT-23/5 8 $1.45 @ 1k
    MAX1723   -  2 5.5 $1.45 @ 1k
    MAX1724  2.7
    3.3     		 -   -  $1.45 @ 1k
    See All Switch-Mode DC-DC Power Supplies (418)
    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.

    Application Notes
  		• Application Note 3241: Charging Batteries Using USB Power - MAX1722
  		• Application Note 3425: Converter Boosts One-Cell Battery Voltage to 50V - MAX1724

    Evaluation Kits
  		• MAX1724EVKIT

    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: 1-24 of 24

    MAX1722 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1722EZK+  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1722EZK  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1722EZK-T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1722EZK+T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1723 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1723EZK+  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1723EZK  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1723EZK+T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1723EZK-T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1724EZK33  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK33+  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK30  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK50+  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK27  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK27+  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK30+  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK50  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK27-T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK50+T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK30+T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK27+T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK33+T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1724EZK30-T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK50-T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1724EZK33-T  
    		SOT-23;5 pin;8 mm²
    Dwg: 21-0113C (PDF)
    Use pkgcode/variation: Z5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    More Information
  		• Topmark Coding: MAX1722 MAX1723 MAX1724
  		• New Product Press Release 2001-08-31  2001-08-02 

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     Description 
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     Diagram 

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    Document Ref.: 19-1735; Rev 0; 2001-07-31
    This page last modified: 2007-06-26




             


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