Low-Cost Flexible Voltage Supervisor and Battery Tester

Batteries are common power source for any electronic components. Preventing it from draining too much below its nominal voltage will help to prolong its lifespan. This reference design is low-cost voltage supervisor and battery tester. It implements the monitoring of multiple, user defined voltage rails while reducing the overall system cost. The main component TLV61225 is a single-cell high-efficient step-up converter that provides power supply solution to products that being powered by a dry cell or up to two Alkaline, NiCd, or NiMH cells with a typical terminal voltage from 0.7 V to 3.3 V and can output 3.3-V voltage. The ATL431 is three-terminal adjustable shunt regulator that provides a 2.5 V output for the resistor ladder. The reference design also incorporates the TPD1E10B06 and TPS27081A, which are single channel ESD transient voltage suppression diode and a high-side load switch used also for ESD protection, respectively. The board also had the LM339, a quad differential comparator that is designed for single power supply.Read more