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Maxim > Products > [Power and Battery Management] 
MAX1508, MAX1508Y, MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFN


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 264kB)
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Description
The MAX1508 is an intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated linear charger for a single-cell lithium-ion (Li+) battery. The MAX1508 integrates the current-sense circuit, MOS pass element, and thermal-regulation circuitry, and also eliminates the reverse-blocking Schottky diode, to create the simplest and smallest charging solution for hand-held equipment.

The MAX1508 functions as a stand-alone charger to control the charging sequence from the prequalification state through fast-charge, top-off charge, and full-charge indication. The MAX1508Y and MAX1508Z eliminate the prequalification state to allow startup into a load without a battery.

Proprietary thermal-regulation circuitry limits the die temperature to +100°C when fast charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC.

The MAX1508 achieves high flexibility by providing an adjustable fast-charge current by an external resistor. Other features include the charging status (active-low CHG) of the battery, an active-low control input (active-low EN) for the MAX1508 and MAX1508Z (active-high control input for the MAX1508Y), and an active-low input power-source detection output (active-low ACOK).

The MAX1508 accepts a +4.25V to +13V supply, but disables charging when the input voltage exceeds +7V to protect against unqualified or faulty AC adapters. The MAX1508 operates over the extended temperature range (-40°C to +85°C) and is available in a compact 8-pin thermally enhanced 3mm x 3mm thin DFN package with 0.8mm height.

Key Features   Applications/Uses
  • Stand-Alone Linear 1-Cell Li+ Battery Charger
  • No External FET, Reverse-Blocking Diode, or Current-Sense Resistor Required
  • Programmable Fast-Charge Current (0.8A max)
  • Proprietary Die-Temperature Regulation Control (+100°C)
  • +4.25V to +13V Input Voltage Range with Input Overvoltage Protection (OVP) Above +7V
  • Charge-Current Monitor for Fuel Gauging
  • Low Dropout Voltage—130mV at 0.425A
  • Input Power-Source Detection Output (active-low ACOK)
  • Soft-Start Limits Inrush Current
  • No Prequalification State for the MAX1508Y and MAX1508Z
  • Charge Status Output (CHG-bar) for LED or Microprocessor Interface
  • Small 3mm x 3mm 8-Pin Thin DFN Package, 0.8mm High
  • Active-Low Charge Enable (EN-bar) (MAX1508 and MAX1508Z)
  • Active-High Charge Enable (EN) (MAX1508Y)

 
  		• Bluetooth® Equipment
  		• Cell Phones/Cordless Phones
  		• Charging Cradles and Docks
  		• Digital Cameras and MP3 Players
  		• PDAs
  		• USB Appliances

    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
    MAX1508 
    Li-Ion
    Li-Polymer
    		 1 13 7 Resistor 0.8 External Control Linear
    Internal FET/Transistor
    Stand Alone
    Thermal Die Regulation
    		 Yes
    TDFN-EP/8
    		 10 -40 to +85 $1.88 @1k
    See All Battery Chargers (62)

    Diagram
    MAX1508, MAX1508Y, MAX1508Z: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 4169: Understanding Li+ Battery Operation Lessens Charging Safety Concerns - MAX1508

    Design Guides
  		• 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: 1-9 of 9

    MAX1508 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1508ETA+  
    		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
    MAX1508ETA+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
    MAX1508ETA-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: No
    Materials Analysis
    MAX1508Y Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1508YETA+  
    		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
    MAX1508YETA-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: No
    Materials Analysis
    MAX1508YETA+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
    MAX1508Z Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1508ZETA+  
    		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
    MAX1508ZETA-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: No
    Materials Analysis
    MAX1508ZETA+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

    Related Products
    MAX1811 USB-Powered Li+ Charger
    MAX1879 Simple, Efficient, 1-Cell Li+ Pulse Charger
    MAX1898 Linear Charger for Single-Cell Li+ Battery
    MAX1501 Highly Integrated, Linear Battery Charger with Thermal Regulation for Portable Applications
    MAX1874 Dual-Input, USB/AC Adapter, 1-Cell Li+ Charger with OVP and Thermal Regulation
    MAX1551, MAX1555 SOT23, Dual-Input, USB/AC Adapter, 1-Cell Li+ Battery Chargers

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    Document Ref.: 19-2890; Rev 2; 2005-09-16
    This page last modified: 2009-10-13


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