LP2980-N_16 Datasheet, PDF (15/30 Pages) Texas Instruments – Micropower 50-mA Ultra Low-Dropout Regulator in SOT-23 Package

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LP2980-N
SNOS733O – APRIL 2000 – REVISED JUNE 2015
8.2.2.1.3 Multilayer Ceramic Capacitors
Surface-mountable multilayer ceramic capacitors may be an attractive choice because of their relatively small
physical size and excellent RF characteristics. However, they sometimes have ESR values lower than the
minimum required by the LP2980-N, and relatively large capacitance change with temperature. The
manufacturer's data sheet for the capacitor should be consulted before selecting a value.
Test results of LP2980-N stability using multilayer ceramic capacitors show that a minimum value of 2.2 μF is
usually needed for the 5-V regulator. For the lower output voltages, or for better performance, a higher value
should be used, such as 4.7 μF.
Multilayer ceramic capacitors that have been verified as suitable for use with the LP2980-N are shown in
Table 2.
Table 2. Surface-Mount Multilayer Ceramic Capacitor Selection Guide
2.2-μF SURFACE-MOUNT CERAMIC
MANUFACTURER
PART NUMBER
Tokin
1E225ZY5U-C203
Murata
GRM42-6Y5V225Z16
4.7-μF SURFACE-MOUNT CERAMIC
MANUFACTURER
PART NUMBER
Tokin
1E475ZY5U-C304
Figure 31. 1-μF ESR Range
Figure 32. 2.2-μF ESR Range
Figure 33. 10-μF ESR Range
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