MAX1508Y
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MAX1508Y

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFN

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Part Details
Features
  • 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 (Active-Low CHG) for LED or Microprocessor Interface
  • Small 3mm x 3mm 8-Pin Thin DFN Package, 0.8mm High
  • Active-Low Charge Enable (Active-Low EN) (MAX1508 and MAX1508Z)
  • Active-High Charge Enable (EN) (MAX1508Y)
Additional Details
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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.

Applications

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

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

MAX1508EVKIT

Evaluation Kit for the MAX1507, MAX1508

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MAX1508EVKIT

Evaluation Kit for the MAX1507, MAX1508

Evaluation Kit for the MAX1507, MAX1508

Features and Benefits

  • Simple, Stand-Alone Li+ Charger
  • Safely Precharges Deeply Discharged Li+ Cells
  • 4.25V to 13V Input Voltage Range
  • 7V Overvoltage Protection Threshold
  • Resistor-Programmable Charge Current Up to 0.8A
  • Charge Current Monitored by a Resistor
  • Programmable Die-Temperature Regulation Set Points (MAX1507 Only)
  • Active-Low ACOK Output (MAX1508 Only)
  • Fully Assembled and Tested

Product Detail

The MAX1507/MAX1508 evaluation kit (EV kit) is a complete, fully assembled, and tested circuit board that demonstrates the MAX1507 linear battery charger for a single-cell lithium-ion (Li+) battery. To evaluate the MAX1508, U1 must be removed and replaced with a MAX1508 device. The EV kit safely charges a single Li+ battery to 4.2V. The EV kit accepts a power-supply input of 4.25V to 13V, but disables charging when the input voltage exceeds 7V. Jumpers on the EV kit allow adjustments to the die-temperature regulation levels (MAX1507 only) and the ability to disable the charger. An LED on the board indicates the status of the charging cycle.

Applications

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

MAX1507EVKIT

Evaluation Kit for the MAX1507, MAX1508

zoom

MAX1507EVKIT

Evaluation Kit for the MAX1507, MAX1508

Evaluation Kit for the MAX1507, MAX1508

Features and Benefits

  • Simple, Stand-Alone Li+ Charger
  • Safely Precharges Deeply Discharged Li+ Cells
  • 4.25V to 13V Input Voltage Range
  • 7V Overvoltage Protection Threshold
  • Resistor-Programmable Charge Current Up to 0.8A
  • Charge Current Monitored by a Resistor
  • Programmable Die-Temperature Regulation Set Points (MAX1507 Only)
  • Active-Low ACOK Output (MAX1508 Only)
  • Fully Assembled and Tested

Product Detail

The MAX1507/MAX1508 evaluation kit (EV kit) is a complete, fully assembled, and tested circuit board that demonstrates the MAX1507 linear battery charger for a single-cell lithium-ion (Li+) battery. To evaluate the MAX1508, U1 must be removed and replaced with a MAX1508 device. The EV kit safely charges a single Li+ battery to 4.2V. The EV kit accepts a power-supply input of 4.25V to 13V, but disables charging when the input voltage exceeds 7V. Jumpers on the EV kit allow adjustments to the die-temperature regulation levels (MAX1507 only) and the ability to disable the charger. An LED on the board indicates the status of the charging cycle.

Applications

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

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