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TPS78227DDCTG4 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS78227DDCTG4 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 29 page Thermal Shutdown 10kW Current Limit Bandgap IN EN OUT EPROM Logic Active Pull- Down GND TPS782 SBVS115D – AUGUST 2008 – REVISED JANUARY 2015 www.ti.com 7 Detailed Description 7.1 Overview The TPS782 family of low-dropout regulators (LDOs) is designed specifically for battery-powered applications where ultralow quiescent current is a critical parameter. The TPS782 family is compatible with the TI MSP430 and other similar products. The enable pin (EN) is compatible with standard CMOS logic. This LDO family is stable with any output capacitor greater than 1.0 µF. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Internal Current Limit The TPS782 is internally current-limited to protect the regulator during fault conditions. During current limit, the output sources a fixed amount of current that is largely independent of output voltage. For reliable operation, the device should not be operated in a current limit state for extended periods of time. The PMOS pass element in the TPS782 series has a built-in body diode that conducts current when the voltage at OUT exceeds the voltage at IN. This current is not limited, so if extended reverse voltage operation is anticipated, external limiting to 5% of rated output current may be appropriate. 7.3.2 Active VOUT Pulldown In the TPS782 series, the active pulldown discharges VOUT when the device is off. However, the input voltage must be greater than 2.2 V for the active pulldown to work. 10 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TPS782 |
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