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TPS7B6933QDBVRQ1 Datasheet(PDF) 11 Page - Texas Instruments |
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TPS7B6933QDBVRQ1 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 24 page TPS7B6925-Q1, TPS7B6933-Q1, TPS7B6950-Q1 www.ti.com SLVSCJ8B – NOVEMBER 2014 – REVISED JANUARY 2015 Feature Description (continued) 8.3.5 Thermal Shutdown The TPS7B69xx-Q1 family of devices incorporates a thermal-shutdown (TSD) circuit as a protection from overheating. For continuous normal operation, the junction temperature should not exceed the TSD trip point. If the junction temperature exceeds the TSD trip point, the output turns off. When the junction temperature falls below the TSD trip point minus the hysteresis of TSD, the output turns on again. This cycling limits the dissipation of the regulator, protecting it from damage as a result of overheating. The purpose of the design of the internal protection circuitry of the TPS7B69xx-Q1 family of devices is for protection against overload conditions, not as a replacement for proper heat-sinking. Continuously running the TPS7B69xx-Q1 family of devices into thermal shutdown degrades device reliability. 8.4 Device Functional Modes 8.4.1 Operation With VI Less Than 4 V The TPS7B69xx-Q1 family of devices operates with input voltages above 4 V. The maximum UVLO voltage is 3 V and the device operates at an input voltage above 4 V. The device can also operate at lower input voltages; no minimum UVLO voltage is specified. At input voltages below the actual UVLO, the device shuts down. 8.4.2 Operation With VI Greater Than 4 V When VI is greater than 4 V, if the input voltage is higher than VO plus the dropout voltage, the output voltage is equal to the set value. Otherwise, the output voltage is equal to VI minus the dropout voltage. Copyright © 2014–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS7B6925-Q1 TPS7B6933-Q1 TPS7B6950-Q1 |
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