Low-cost, flexible voltage supervisor and battery tester reference design

This is a low-cost, flexible voltage supervisor that uses a voltage reference in order to test the voltage of a battery. This solution can also be used as a voltage rail monitor for many applications that require accurate power delivery with multiple rails. With TI's ultra-low power voltage references, the total system power consumption is reduced, while maintaining a low BOM cost. Testing and displaying the battery voltage provides an example of how easily this can be designed and implemented in comparable applications. 

Features   

• The ATL431 shunt regulator allows for voltage regulation with minimal current consumption (60 µA) 
• TLV61225 boost converter enables the entire circuit to be powered from a AA battery (0.8 V to 3.3 V Input)
• User Configurable resistor ladder creates customizable number of voltage rails for supervision 
• Low Cost to design for customized voltage supervision 
• Footprint can fit on the backside of a single AA battery voltage holder 
• No Firmware or Software Needed 
• The ATL431 shunt regulator allows for voltage regulation with minimal current consumption (60 µA) 
• TLV61225 boost converter enables the entire circuit to be powered from a AA battery (0.8 V to 3.3 V Input) 
• User Configurable resistor ladder creates customizable number of voltage rails for supervision 
• Low Cost to design for customized voltage supervision 
• Footprint can fit on the backside of a single AA battery voltage holder 
• No Firmware or Software Needed

Parts Include :
ATL431  2.5V Low Iq Adjustable Precision Shunt Regulator 
LM339    Quad Differential Comparator 
TLV61225   Single Cell High Efficient Step-Up Converter in 6 pin SC-70 Package 
TPD1E10B06  Single Channel ESD in 0402 package with 10pF Capacitance and 6V Breakdown 
TPS27081A  1.2V – 8V, 3A PFET High Side Load Switch w/ Level Shift & Adj Slew Rate Control 

Learn more by downloading the reference design below