Probably a Fairchild fan2502s26x voltage regulator. Obsolete. Datasheet here:
http://www.alldatasheet.com/datasheet-pdf/pdf/51162/FAIRCHILD/FAN2502S26X.htmlCeramic is fine. 2.2uF or greater.
Relevant section:
Input Capacitor
An input capacitor of 2.2?F (nominal value) or greater,
connected between the Input pin and Ground, located in
close proximity to the device, will improve transient
response and noise rejection. Higher values will offer superior
input ripple rejection and transient response. An input
capacitor is recommended when the input source, either a
battery or a regulated AC voltage, is located far from the
device. Any good quality ceramic, tantalum, or metal film
capacitor will give acceptable performance, however tantalum
capacitors with a surge current rating appropriate to the
application must be selected to avoid catastrophic failure.