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TPS7A3401 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS7A3401 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 27 page ![]() Error Amp Enable Anti- saturation Thermal Shutdown Current Limit Bandgap FB OUT GND IN EN Pass Device TPS7A3401 SBVS163A – JUNE 2011 – REVISED MAY 2015 www.ti.com 7 Detailed Description 7.1 Overview The TPS7A3401 device is a wide VIN, low-noise, 150-mA linear regulator (LDO). This device features an enable pin, programmable soft-start, current limiting, and thermal protection circuitry that allow the device to be used in a wide variety of applications. As a bipolar-based device, the TPS7A3401 device is ideal for high-accuracy, high- precision applications at higher voltages. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Internal Current Limit The fixed internal current limit of the TPS7A3401 device helps protect the regulator during fault conditions. The maximum amount of current the device can source is the current limit (330 mA, typical), and it is largely independent of output voltage. For reliable operation, do not operate the device in current limit for extended periods of time. 7.3.2 Enable Pin Operation The TPS7A3401 device provides a dual polarity enable pin (EN) that turns on the regulator when |VEN| > 2 V, whether the voltage is positive or negative, as shown in Figure 18. This functionality allows for different system power management topologies: • Connecting the EN pin directly to a negative voltage, such as VIN, or • Connecting the EN pin directly to a positive voltage, such as the output of digital logic circuitry. 10 Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated Product Folder Links: TPS7A3401 |
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