Linear Technology's LTC4070EMS8E#PBF - Li-Ion/Polymer Shunt Battery Charger System

The LTC4070EMS8E#PBF by Linear Technology is a highly sophisticated and versatile shunt battery charger system designed for Li-Ion and Li-Polymer batteries. This advanced charging solution is ideal for low-power applications, where energy efficiency and battery life are crucial. It is housed in a compact MSOP-8 package, making it suitable for space-constrained applications.

The LTC4070 allows for small battery charging with current as low as 1mA up to 50mA. It features an innovative low battery disconnect function that protects the battery from deep discharge, thus extending the battery's lifespan. The charger's float voltage accuracy is ±0.5%, ensuring that the battery is charged precisely to its termination voltage without overcharging, which can be detrimental to battery health.

One of the key features of the LTC4070EMS8E#PBF is its low quiescent current, which is particularly important for battery-powered devices that need to conserve power. The device also includes an onboard thermal feedback that regulates the charge current to limit the die temperature during high power operation or high ambient temperature conditions.

The LTC4070 is equipped with an automatic recharge feature, which initiates a new charging cycle if the battery voltage falls below a preset threshold. This ensures that the battery remains fully charged without requiring manual intervention. Additionally, it includes a charge status output that can be used to indicate the charging progress or to signal a completed charge.

For added flexibility, the device does not require any external MOSFET, sense resistor, or blocking diode, which simplifies the design and reduces the overall solution footprint. The LTC4070EMS8E#PBF is designed to work with multiple input sources, including solar panels, making it a versatile choice for a wide range of environmentally-friendly applications.

In summary, the LTC4070EMS8E#PBF from Linear Technology is a feature-rich, easy-to-use shunt battery charger that provides a reliable and efficient charging solution for small Li-Ion/Polymer batteries, making it an excellent choice for portable, wearables, and energy-harvesting applications.