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MAX1736
SOT23, Single-Cell Li+ Battery Charger for Current-Limited Supply

SOT23, Single-Cell Li+ Battery Charger


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 192kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1736 is a simple, low-cost, single-cell lithium-ion (Li+) battery charger for small hand-held applications. When accompanied by a current-limited voltage source (such as a wall cube), the MAX1736 provides simple, accurate charging and termination control for single-cell Li+ batteries. The MAX1736EUT42 is preset to a 4.2V battery regulation voltage, while the MAX1736EUT41 is preset to 4.1V.

The MAX1736 initiates charging in one of four ways: battery insertion, charger power-up, battery voltage threshold, and by external manipulation of the EN pin. The device features an internal precharge current source that safely charges near-dead cells, as well as input-supply detection that shuts down the MAX1736 when the supply is removed to minimize battery current drain.

The MAX1736 accepts input voltages up to 22V, making it compatible with a wide range of input supplies. It has a single control input yet offers stand-alone and microprocessor-controlled operation. The MAX1736 is packaged in a small SOT23-6 package. An evaluation kit (EV kit) is available to reduce design time.

An evaluation kit is available:  MAX1736EVKIT  

Key Features   Applications/Uses
  • Small 6-Pin SOT23 Package
  • Stand-Alone or µP-Controlled Operation
  • 0.5% Voltage Set-Point Accuracy
  • Lowest Power Dissipation
  • Low 4.7V min Input Voltage
  • Top-Off Charging to Achieve Full Battery Capacity
  • No Inductor Required
  • Safely Precharges Near-Dead Cells
  • Automatic Power-Down when Input Power Removed

 
  		• Cradle Chargers
  		• Digital Still Cameras
  		• PDAs and Other Handheld Devices
  		• Self-Charging Battery Packs
  		• Single-Cell Li+ Portable Applications
  		• Small Handheld Equipment
  		• Wireless Handsets

    Key Specifications:  Battery Chargers
    Part Number Cell Chemistry Lithium Ion Cells Protected VIN
    (V)    		 Charging VIN
    (V)    		 Charge Rate Set by Max. ICHG
    (A)    		 Charge Termination Charge Regulation Features EV Kit Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    max max ≥ max w/pins See Notes
    MAX1736 
    Li-Ion
    Li-Polymer
    		 1 22 22 External Source 2
    Current Limit
    Max. Voltage
    		 Pulse Stand Alone Yes
    SOT/6
    TDFN-EP/6
    		 9 -40 to +85 $1.50 @1k
    See All Battery Chargers (62)

    Diagram
    MAX1736: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 913: Switch-Mode, Linear, and Pulse Charging Techniques for Li+ Battery in Mobile Phones and PDAs - MAX1736

    Evaluation Kits
  		• MAX1736EVKIT

    Reliability Reports
  		• Reliability Report: MAX1736.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: 1-6 of 6

    MAX1736 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1736EUT42+  
    		Active 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: Lead Free
    Materials Analysis
    MAX1736EUT42+T    
    		Active 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: Lead Free
    Materials Analysis
    MAX1736EUT-T    
    		Active 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
    MAX1736EUT41-T    
    		Active 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
    MAX1736EUT42-T    
    		Active 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
    MAX1736ETT42+T    
    		Active TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX1736
  		• New Product Press Release 2000-06-09 

    Related Products
    MAX745 Switch-Mode Lithium-Ion Battery-Charger

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    Document Ref.: 19-1662; Rev 1; 2001-01-31
    This page last modified: 2007-06-05


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