MAX1873
PRODUCTIONSimple Current-Limited Switch-Mode Li+ Charger Controller
Lowest Cost Switch-Mode Li+ Charger includes Input-Current Limiting Loop
- Part Models
- 6
- 1ku List Price
- Starting From $3.10
Overview
- Low-Cost and Simple Circuit
- Charges 2-, 3-, or 4-Series Lithium-Ion Cells
- AC Adapter Input-Current-Limit Loop
- Also Charges Ni-Based Batteries
- Analog Output Monitors Charge Current
- ±0.75% Battery-Regulation Voltage
- 5µA Shutdown Battery Current
- Input Voltage Up to 28V
- 200mV Dropout Voltage/100% Duty Cycle
- Adjustable Charging Current
- 300kHz PWM Oscillator Reduces Noise
- Space-Saving 16-Pin QSOP
- MAX1873 Evaluation Kit Available to Speed Designs
The low-cost MAX1873R/S/T provides all functions needed to simply and efficiently charge 2-, 3-, or 4-series lithium-ion cells at up to 4A or more. It provides a regulated charging current and voltage with less than ±0.75% total voltage error at the battery terminals. An external P-channel MOSFET operates in a step-down DC-DC configuration to efficiently charge batteries in low-cost designs.
The MAX1873R/S/T regulates the battery voltage and charging current using two control loops that work together to transition smoothly between voltage and current regulation. An additional control loop limits current drawn from the input source so that AC adapter size and cost can be minimized. An analog voltage output proportional to charging current is also supplied so that an ADC or microcontroller can monitor charging current.
The MAX1873 may also be used as an efficient current-limited source to charge NiCd or NiMH batteries in multichemistry charger designs. The MAX1873R/S/T is available in a space-saving 16-pin QSOP package. Use the evaluation kit (MAX1873EVKIT) to help reduce design time.
Applications
- 2-, 3-, or 4-Cell Li+ Battery Pack Chargers
- 6-, 9-, or 10-Cell Li+ Battery Pack Chargers
- Desktop Cradle Chargers
- Handheld Instruments (PDAs, Palmtops)
- Notebook Computers
- Portable Desktop Assistants (PDAs)
- Portable Internet Tablets
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 |
|---|---|---|---|
| MAX1873REEE+ | QSOP | ||
| MAX1873REEE+T | QSOP | ||
| MAX1873SEEE+ | QSOP | ||
| MAX1873SEEE+T | QSOP | ||
| MAX1873TEEE+ | QSOP | ||
| MAX1873TEEE+T | QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Mar 13, 2023 - 2361N WAFER FAB |
||
| MAX1873REEE+ | PRODUCTION | |
| MAX1873REEE+T | PRODUCTION | |
| MAX1873SEEE+ | PRODUCTION | |
| MAX1873SEEE+T | PRODUCTION | |
| MAX1873TEEE+ | PRODUCTION | |
| MAX1873TEEE+T | PRODUCTION | |
|
Jan 24, 2019 - 1746N ASSEMBLY |
||
| MAX1873REEE+ | PRODUCTION | |
| MAX1873REEE+T | PRODUCTION | |
| MAX1873SEEE+ | PRODUCTION | |
| MAX1873SEEE+T | PRODUCTION | |
| MAX1873TEEE+ | PRODUCTION | |
| MAX1873TEEE+T | PRODUCTION | |
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX1873REEE+T | PRODUCTION | |
| MAX1873SEEE+T | PRODUCTION | |
| MAX1873TEEE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits
Evaluation Kit for the MAX1873