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TPS79325DBVRG4 Datasheet(PDF) 11 Page - Texas Instruments |
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TPS79325DBVRG4 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 18 page www.ti.com 22 pF 15 pF 15 pF OUTPUT VOLTAGE PROGRAMMING GUIDE OUTPUT VOLTAGE R1 R2 2.5 V 3.3 V 3.6 V C1 31.6 k Ω 51 k Ω 59 k Ω 30.1 k Ω 30.1 k Ω 30.1 k Ω 0 pF 1.22 V short open TPS793xx GND NR FB IN OUT EN V IN V OUT R1 C1 R2 1 µF 1 µF 0.01 µF Regulator Protection TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475 SLVS348H – JULY 2001 – REVISED OCTOBER 2004 APPLICATION INFORMATION (continued) Figure 23. TPS79301 Adjustable LDO Regulator Programming The TPS793xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input voltage drops below the output voltage (e.g., during power-down). Current is conducted from the output to the input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might be appropriate. The TPS793xx features internal current limiting and thermal protection. During normal operation, the TPS793xx limits output current to approximately 400 mA. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package or the absolute maximum voltage ratings of the device. If the temperature of the device exceeds approximately 165 °C, thermal-protection circuitry shuts it down. Once the device has cooled down to below approximately 140 °C, regulator operation resumes. 11 |
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