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ACT8846 Scheda tecnica(PDF) 37 Page - Active-Semi, Inc |
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ACT8846 Scheda tecnica(HTML) 37 Page - Active-Semi, Inc |
37 / 44 page ACT8846 Rev 7.0 06-Dec-2017 Innovative PowerTM - 37 - www.active-semi.com Copyright © 2016-2017 Active-Semi, Inc. ActivePMUTM is a trademark of Active-Semi. I2CTM is a trademark of NXP. General Description REG13 is an always-on, low-dropout linear regulator (LDO) that is optimized for RTC and backup-battery applications. REG13 features low- quiescent supply current, current-limit protection, and reverse-current protection, and is ideally suited for always-on power supply applications, such as for a real-time clock, or as a backup-battery or super-cap charger. Reverse-Current Protection REG13 features internal circuitry that limits the reverse supply current to less than 1µA when the input voltage falls below the output voltage, as can be encountered in backup-battery charging applications. REG13's internal circuitry monitors the input and the output, and disconnects internal circuitry and parasitic diodes when the input voltage falls below the output voltage, greatly minimizing backup battery discharge. Typical Application Voltage Regulators REG13 is ideally suited for always-on voltage- regulation applications, such as for real-time clock and memory keep-alive applications. This regulator requires only a small ceramic capacitor with a minimum capacitance of 0.47μF for stability. For best performance, the output capacitor should be connected directly between the output and GA, with a short and direct connection. Figure 5: Typical Application of RTC LDO Backup Battery Charging REG13 features a constant current-limit, which protects the IC under output short-circuit conditions as well as provides a constant charge current, when operating as a backup battery charger. ALWAYS-ON LDO (REG13) ACT8846 RTC Supper cap or Back- up battery OUT13 |
Codice articolo simile - ACT8846_17 |
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Descrizione simile - ACT8846_17 |
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