MAX1508
PRODUCTIONLinear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFN
- Part Models
- 4
- 1ku List Price
- Starting From $3.35
Overview
- 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)
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
Documentation
Data Sheet 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1508ETA+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX1508ETA+T | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX1508ZETA+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX1508ZETA+T | Thin Dual Flatpack No Leads, Exposed Pad |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 27, 2024 - 2400 ASSEMBLY |
||
| MAX1508ETA+ | PRODUCTION | |
| MAX1508ETA+T | PRODUCTION | |
| MAX1508ZETA+ | PRODUCTION | |
| MAX1508ZETA+T | PRODUCTION | |
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX1508ETA+T | PRODUCTION | |
| MAX1508ZETA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571D PIN/ERRATA |
||
| MAX1508ZETA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Charger ICs 7 | ||
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Evaluation Kits
Evaluation Kit for the MAX1507, MAX1508
Evaluation Kit for the MAX1507, MAX1508
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