PST523 Battery Backup IC

PST523 Battery Backup IC

MITSUMI Battery Backup IC Battery Backup IC 1. Background of Development Around 1985 when began the sales of IC for microcomputer peripheral equipment and system reset IC, a set manufacture inquired of us about IC for control of memory. It was a good change for us to decide a joint development of .

Features

ly over to battery, and monitor the residual voltage of the battery, to take a few examples. 3. Basic Configuration Fig. 1 below illustrates the basic configuration of the backup IC. We have PST531, PST532 and MM1026 as IC of the basic configuration. 3-1 Battery/Main Supply Changeover Circuit 1. 3.3V detect circuit
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· Main supply detection 2. Transistor switch
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· Main supply ON/OFF switch 3. Schottky diode
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· For supplying backup power 3-2 Configuration of CS (CE) Control circuit 1. 4.2V detect circuit
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· Detection of main supply 2. Output reverse circuit
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· Reverses CS signa.