ZHCSJK1G November 2002 – May 2019 LM2733
PRODUCTION DATA.
A single ceramic capacitor of value 4.7 µF to 10 µF provides sufficient output capacitance for most applications. For output voltages below 10 V, a 10-µF capacitance is required. If larger amounts of capacitance are desired for improved line support and transient response, tantalum capacitors can be used in parallel with the ceramics. Aluminum electrolytics with ultra-low ESR such as Sanyo Oscon can be used, but are usually prohibitively expensive. Typical AI electrolytic capacitors are not suitable for switching frequencies above 500 kHz due to significant ringing and temperature rise due to self-heating from ripple current. An output capacitor with excessive ESR can also reduce phase margin and cause instability.