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SLYZ022 데이터시트(PDF) 11 Page - Texas Instruments |
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SLYZ022 데이터시트(HTML) 11 Page - Texas Instruments |
11 / 22 page TLV704 www.ti.com SBVS148D – OCTOBER 2010 – REVISED JANUARY 2015 7.4 Device Functional Modes 7.4.1 Normal Operation The device regulates to the nominal output voltage under the following conditions: • The input voltage is greater than the nominal output voltage added to the dropout voltage. • The output current is less than the current limit. 7.4.2 Dropout Operation If the input voltage is lower than the nominal output voltage plus the specified dropout voltage, but all other conditions are met for normal operation, the device operates in dropout mode. In this condition, the output voltage is the same the input voltage minus the dropout voltage. The transient performance of the device is significantly degraded because the pass device is in a triode state and no longer controls the current through the LDO. Line or load transients in dropout may result in large output voltage deviations. Table 1 lists the conditions that lead to the different modes of operation. Table 1. Device Functional Mode Comparison PARAMETER OPERATING MODE VIN IOUT Normal mode VIN > VOUT (nom) + VDO IOUT < ICL Dropout mode VIN < VOUT (nom) + VDO IOUT < ICL Copyright © 2010–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TLV704 |
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