TS5204
Taiwan Semiconductor
4 Version: L1609
APPLICATION INFORMATION (CONTINUE)
Output Capacitor Requirement
The TS5204 series requires an output capacitor to maintain stability and improve transient response is necessary.
2.2μF minimum is recommended. Larger values improve the regulator’s transient response. The output capacitor
value may be increased without limit.
The output capacitor should have an ESR (effective series resistance) less than 5Ω and a resonant frequency
above 1MHz. Ultra-low ESR capacitors can cause a low amplitude oscillation on the output and/or under damped
transient response. Most of tantalum or aluminum electrolytic capacitors are adequate; film types will work. Since
many aluminum electrolytic have electrolytes that freeze at about –30°C, solid tantalums are recommended for
operation below –25°C. At lower values of output current, less output capacitance is required for output stability.
The capacitor can be reduced to 0.47μF for current below 10mA or 0.33μF for currents below 1mA.
No Load Stability
The TS5204 series will remain stable and in regulation with no load, unlike many other voltage regulators. This is
especially important in CMOS RAM keep alive applications.
Dual Supply Operation
When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage
must be diode clamped to ground.
ELECTRICAL CHARACTERICS CURVES (T
A
=25
o
C, unless otherwise noted)
Figure 1. Dropout Voltage vs. Output Current
Figure 2. Ground Current vs. Output Current
Figure 3. Dropout Voltage vs. Output Current
Figure 4. Short Circuit Current vs. Input Voltage
