2 AA cells replace 9V battery, extend operating life
Steve Pietkiewicz
Abstract
Replacing a 9V "transistor" battery with 2 AA cells and a step-up switching regulator can provide significant gains in battery life as well as cost savings. Three approaches with a 30mA load are illustrated and compared.
Keywords
9V battery
AA cells
operating life
Operating life is an important feature in many portable battery-operated systems. In many cases the power source is the ubiquitous 9V “transistor” battery. 5V generation is accomplished with a linear regulator. Significant gains in battery life can be obtained by replacing the 9V/linear regulator combination with 2 AA cells and a step-up switching regulator. Two (alkaline) AA cells ...
Get Analog Circuit Design Volume Three now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
