ZHCSHE9J June 2010 – January 2018 TPS7A80
PRODUCTION DATA.
Although an input capacitor is not required for stability, it is good analog design practice to connect a 0.1-μF to 1-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 located several inches from the power source. If source impedance is not sufficiently low, a 0.1-μF input capacitor may be necessary to provide stability.
The TPS7A80 are designed to be stable with standard ceramic capacitors of capacitance values 4.7 μF or larger. These devices is evaluated using a 4.7-μF ceramic capacitor of 10-V rating, 10% tolerance, X5R type, and 0805 size (2 mm × 1.25 mm).
X5R- and X7R-type capacitors are highly recommended because they have minimal variation in value and ESR over temperature. Maximum ESR should be < 1 Ω.
The TPS7A80 implement an innovative internal compensation circuit that does not require a feedback capacitor across R2 for stability. Do not use a feedback capacitor for this device.