MAX1811

Description

MAX1811ESA-T – Single-Cell Li-Ion Battery Charger IC

The MAX1811ESA-T is a standalone, linear Li-Ion battery charger IC designed to charge a single-cell lithium-ion (Li-Ion) battery from either a USB port or an AC adapter. It requires no external MOSFETs and features automatic charge termination for safe and efficient charging.

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Key Features:

USB & Adapter Compatibility – Supports 100mA and 500mA charge current from USB, up to 1A with an AC adapter.
No External Components Required – Integrated power MOSFETs eliminate the need for external switches.
Fixed 4.2V Charge Termination Voltage – Ensures safe and full charging.
Precharge Mode – Charges deeply discharged batteries before applying full charge current.
Thermal Regulation & Protection – Prevents overheating by adjusting charge current dynamically.
Charge Status Indicators – Allows easy monitoring of charging progress via LEDs.
Compact & Low-Power Design – Available in an 8-pin SOIC (ESA) package.

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Technical Specifications:

Parameter	Value
Input Voltage (VIN)	4.25V – 6.5V
Battery Type	Single-cell Li-Ion
Charge Current	100mA, 500mA (USB); up to 1A (Adapter)
Charge Termination	4.2V (Fixed)
Operating Temperature	-40°C to +85°C
Package Type	8-Pin SOIC (ESA)

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Applications:

USB-Powered Devices – Smartphones, MP3 players, and portable electronics.
Embedded Systems – Battery-powered circuits and IoT devices.
Wearables & DIY Projects – Perfect for compact Li-Ion charging solutions.
Prototyping & Development – Ideal for quick battery management integration.

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Package Includes:

1 x MAX1811ESA-T Li-Ion Battery Charger IC