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LP3988QMFX-2P85 Datasheet(PDF) 9 Page - Texas Instruments |
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LP3988QMFX-2P85 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 17 page LP3988-Q1 www.ti.com SLAS928A – MARCH 2013 – REVISED JULY 2013 ON/OFF INPUT OPERATION The LP3988-Q1 is turned off by pulling the VEN pin low, and turned on by pulling it high. If this feature is not used, the VEN pin should be tied to VIN to keep the regulator output on at all time. To assure proper operation, the signal source used to drive the VEN input must be able to swing above and below the specified turnon/turnoff voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. FAST ON-TIME The LP3988-Q1 utilizes a speed-up circuit to ramp up the internal VREF voltage to its final value to achieve a fast output turnon time. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LP3988-Q1 |
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