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TLE4290 Datasheet(PDF) 8 Page - Infineon Technologies AG |
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TLE4290 Datasheet(HTML) 8 Page - Infineon Technologies AG |
8 / 17 page Data Sheet 8 Rev. 1.7, 2007-03-20 TLE 4290 Application Information Figure 4 Application Diagram Input, Output An input capacitor is necessary for damping line influences. A resistor of approx. 1 Ω in series with C I, can damp the LC of the input inductivity and the input capacitor. The TLE 4290 requires an output capacitor of at least 22 μF with an ESR below 5 Ω for stability. Power Good The Power Good pin informs e.g. the micro-controller in case the output voltage has fallen below a threshold of typ. 3.65 V. When the battery voltage is supplied the Power Good signal indicates a loss of memory due to missing power. After the Memory Good switching threshold is reached the Power Good output remains low for the Power Good delay time. This time can be set by the user with an external capacitor at pin D according to the requirements of the application, e.g. the time until the microcontroller is initialized and ready to receive any information. AES02822 Current and Saturation Control Band- Gap- Reference TLE 4290 Power Good Control 2 5 I 4 C I1 C I2 V BAT C D 47 nF GND R PG 5 k 22 µF µ-Controller V CC NMI / PORT Internal Reset D PG Q 100 nF C Q2 C Q1 1 |
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