ZHCS055C May 2011 – January 2023 TLV1117LV
PRODUCTION DATA
For stability, 1.0-μF ceramic capacitors are required at the output. Higher-valued capacitors improve transient performance. Use X5R- and X7R-type ceramic capacitors because these capacitors have minimal variation in value and equivalent series resistance (ESR) over temperature. Unlike traditional linear regulators that need a minimum ESR for stability, the TLV1117LV is specified to be stable with no ESR. Therefore, cost-effective ceramic capacitors can be used with this device. Effective output capacitance that takes bias, temperature, and aging effects into consideration must be greater than 0.5 μF to ensure stability of the device.
Although an input capacitor is not required for stability, good analog design practice is to connect a 0.1-μF to 1.0-μF, low-ESR capacitor across the IN pin and GND pin of the regulator. This capacitor counteracts reactive input sources and improves transient response, noise rejection, and ripple rejection. A higher-value capacitor can be necessary if large, fast rise-time load transients are anticipated, or if the device is not located physically close to the power source. If source impedance is greater than 2 Ω, a 0.1-μF input capacitor can also be necessary to ensure stability.