ZHCSWP4A July 2007 – July 2024 TRS208
PRODUCTION DATA
The capacitor type used for C1–C4 is not critical for proper operation. The TRS208 requires 0.1μF capacitors, although capacitors up to 10μF can be used without harm. Ceramic dielectrics are suggested for the 0.1μF capacitors. When using the minimum recommended capacitor values, make sure the capacitance value does not degrade excessively as the operating temperature varies. If in doubt, use capacitors with a larger (2×) nominal value. The capacitors' effective series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+ and V–.
Use larger capacitors (up to 10μF) to reduce the output impedance at V+ and V–.
Bypass VCC to ground with at least 0.1μF. In applications sensitive to power-supply noise generated by the charge pumps, decouple VCC to ground with a capacitor the same size as (or larger than) the charge-pump capacitors (C1–C4).