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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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Description
FULL DATA SHEET (PDF, 192kB)
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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.

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 Number of Lithium-Ion cells Protected VIN (max) (V) Charging VIN (max) (V) Charge Rate Set by Max. Charge Current (A) Max. Charge Current (A) Charge Termination Charge Regulation Features EV-Kit Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX1736  Li-Ion
    Li-Polymer
    1 22 22 External Source 2 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)
    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
    MAX1736: Typical Operating Circuit
    Typical Operating Circuit

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


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