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Linear Li+ Battery Charger with Integrated Pass FET and Thermal Regulation in 3mm x 3mm Thin DFN

Smallest Temperature-Regulated, Linear, 1-Cell Li+ Battery Chargers with 14V Input

Product Details

Key Features

Parametric specs for Battery Chargers
Charging VIN (V) (max) 7
Max. ICHG (A) 0.8
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 13
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
2.4
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 7
Max. ICHG (A) 0.8
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 13
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
2.4

Key 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 Programmable Die-Temperature Regulation Control (+90°C, +100°C, and +130°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 (VL) and Charge-Enable Input (Active-Low EN)
  • Soft-Start Limits Inrush Current
  • Charge Status Output (Active-Low CHG) for LED or Microprocessor Interface
  • Small 3mm x 3mm 8-Pin Thin DFN Package, 0.8mm High

Applications/Uses

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

Description

The MAX1507 is an intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated linear charger for a single-cell lithium-ion (Li+) battery. The MAX1507 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 MAX1507 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.

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

The MAX1507 achieves high flexibility by providing an adjustable fast-charge current and thermal regulation setpoints. Other features include the charging status (active-low CHG) of the battery and an active-low control input (active-low EN).

The MAX1507 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 MAX1507 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.

Simplified Block Diagram

MAX1507: Typical Operating Circuit MAX1507: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.