TS5201_08 Datasheet, PDF (5/7 Pages) Taiwan Semiconductor Company, Ltd – 200mA Low Noise LDO Voltage Regulator with Enable

TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Application Information (Continue)
The junction to ambient thermal resistance for the minimum footprint is 220^oC/W, the maximum power dissipation
must not be exceeded for proper operation. Using the output voltage of 3.3V and an output current of 120mA, the
maximum input voltage can be determined. From the electrical characteristics table, the maximum ground current for
120mA output current is 2.5mA.
445mW = (V_IN – 3.3V ) * 200mA + V_IN * 2.5mA
445mW = V_IN * 200mA – 3.3 * 200mA + V_IN * 2.5mA
445mW = V_IN * 200mA – 495mW + V_IN * 2.5mA
950mW = V_IN * 152.5mA
V_IN (max) = 6.23V
Therefore, a 3.3V application at 200mA of output current can accept a maximum input voltage of 6.23V in a SOP-8
package.
Noise Reduction Capacitors
On adjustable devices, a capacitor from ADJ to GND will decrease high frequency noise on the output. See following
figure:


Minimum Load
The TS5201 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially
important in CMOS RAM keep-alive applications.
5/7
Version: B07