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TPS783xx Datasheet(PDF) 11 Page - Texas Instruments |
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TPS783xx Datasheet(HTML) 11 Page - Texas Instruments |
11 / 24 page TPS783xx GND EN IN OUT V IN V OUT 2.2 F m 1 F m On Off TPS783 www.ti.com SBVS133A – FEBRUARY 2010 – REVISED NOVEMBER 2014 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 TPS783 family of LDOs is factory-programmable to have a fixed output. Note that during startup or steady- state conditions, do not allow the EN pin voltage to exceed VIN + 0.3 V. 8.2 Typical Application Figure 19. Providing a Low-Power Standby Rail 8.2.1 Design Requirements 8.2.1.1 Input and Output Capacitor Requirements A 0.1- μF input capacitor is necessary for stable operation. Good analog design practice is to connect a 0.1-μF to 1.0- μF, low equivalent series resistance (ESR) capacitor across the input supply near the regulator. This capacitor counteracts reactive input sources and improves transient response, noise rejection, and ripple rejection. A higher-value capacitor may be necessary if large, fast rise-time load transients are anticipated, or if the device is not located near the power source. The TPS783 family is designed to be stable with standard ceramic capacitors with values of 1.0 μF or larger at the output. X5R- and X7R-type capacitors are best because they have minimal variation in value and ESR over temperature. Maximum ESR must be less than 1.0 Ω. With tolerance and dc bias effects, the minimum capacitance for stable operation is 1 μF. Copyright © 2010–2014, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS783 |
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