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TPS7A7002DDAR Datasheet(PDF) 6 Page - Texas Instruments |
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TPS7A7002DDAR Datasheet(HTML) 6 Page - Texas Instruments |
6 / 20 page V = 0.5 x ( ) OUT 1 + R 1 R 2 Thermal Protection OUT V OUT IN EN Hysteresis Current Limit UVLO GND Charge Pump 0.5V Reference R 1 R 2 FB TPS7A7002 SBVS209C – MAY 2013 – REVISED JANUARY 2016 www.ti.com 7 Detailed Description 7.1 Overview The TPS7A7002 offers a high current supply with very-low dropout voltage. The TPS7A7002 is designed to minimize the required component count for a simple, small-size, and low-cost solution. 7.2 Functional Block Diagram Figure 7. Adjustable Output Voltage Version 7.3 Feature Description 7.3.1 Internal Current Limit The TPS7A7002 internal current limit helps protect the regulator during fault conditions. During a current limit condition, the output sources a fixed amount of current largely independent of output voltage. For reliable operation, do not operate the device in a current limit state for an extended period of time. Powering on the device with the enable pin, or increasing the input voltage above the minimum operating voltage while a low-impedance short exists on the output of the device, may result in a sequence of high-current pulses from the input to the output of the device. The energy consumed by the device is minimal during these events; therefore, there is no failure risk. Additional input capacitance helps to mitigate the load transient requirement of the upstream supply during these events. 7.3.2 Enable (EN) The enable pin (EN) is an active-high logic input. When it is logic low, the device turns off, and the consumption current is less than 1 µA. When it is logic high, the device turns on. The EN pin must be connected to a logic high or logic low level. When the enable function is not required, connect EN to IN. 6 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated Product Folder Links: TPS7A7002 |
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