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LP5900SD-2.5 Datasheet(PDF) 10 Page - Texas Instruments |
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LP5900SD-2.5 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 30 page IN VBG 1.2 V + EN GND POR + OUT VIH RF CF + EN EN 1 M 10 LP5900 SNVS358R – JULY 2005 – REVISED JUNE 2016 www.ti.com Product Folder Links: LP5900 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated 7 Detailed Description 7.1 Overview Designed to meet the needs of sensitive RF and analog circuits, the LP5900 provides low noise, high PSRR, and low quiescent current, as well as low line and load transient response figures. Using new innovative design techniques, the LP5900 offers class-leading noise performance without the need for a separate noise filter capacitor. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 No-Load Stability The LP5900 remains stable and in regulation with no external load. 7.3.2 Enable Control The LP5900 enable (EN) pin is internally held low by a 1-M Ω resistor to GND. The EN must be higher than the VIH threshold to ensure that the device is fully enabled under all operating conditions. The EN pin voltage must be lower than the VIL threshold to ensure that the device is fully disabled. 7.3.3 Low Noise Output Any internal noise at the LP5900 reference voltage is reduced by a first order low-pass RC filter before it is passed to the output buffer stage. This eliminates the need for the external bypass capacitor for noise suppression. |
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