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TPS79927-Q1 Fiches technique(PDF) 11 Page - Texas Instruments |
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TPS79927-Q1 Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 25 page TPS79901 GND EN FB IN OUT V IN V OUT R 1 C FB R 2 Optionalinputcapacitor. Mayimprovesource impedance,noise,orPSRR. V = OUT ´ 1.193 (R 1 2 +R ) R 2 V EN 2.2 F m Ceramic TPS799xx GND EN NR IN OUT V IN V OUT Optional input capacitor. May improve source impedance, noise, or PSRR. Optional bypass capacitor to reduce output noise and increase PSRR. 2.2µF Ceramic V EN TPS799-Q1 www.ti.com SBVS097F – MARCH 2008 – REVISED JUNE 2015 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The TPS799xx-Q1 family of LDO regulators combines the high performance required of many RF and precision analog applications with ultralow current consumption. High PSRR is provided by a high gain, high bandwidth error loop with good supply rejection at very low headroom (VIN – VOUT). Fixed-voltage versions provide a noise reduction pin to bypass noise generated by the bandgap reference and to improve PSRR while a quick-start circuit fast-charges this capacitor at start-up. The combination of high performance and low ground current also make the TPS799xx-Q1 an excellent choice for portable applications. All versions have thermal and overcurrent protection and are fully specified from –40°C to 125°C. Figure 12 shows the basic circuit connections for fixed-voltage model. Figure 13 gives the connections for the adjustable output version (TPS79901). R1 and R2 can be calculated for any output voltage using the formula in Figure 13. Sample resistor values for common output voltages are shown in Figure 13. 8.2 Typical Application Figure 12. Typical Application Circuit for Fixed-Voltage Version Figure 13. Typical Application Circuit for Adjustable-Voltage Version Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS799-Q1 |
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