USPN4 – XC6221

200mA High Speed LDO Voltage Regulators with ON/OFF Control

The XC6221 series are precise, low noise, high speed, low dropout regulators. They are fabricated using Torex’s CMOS process.

Performance features of the series include high ripple rejection and low dropout voltage, and the series include a reference voltage source, an error amplifier, a current limiter, and a phase compensation circuit. The CE function enables the circuit to be in stand-by mode by inputing L level signal. In the stand-by mode, the series enables the electric charge at the output capacitor (C_L) to be discharged via the internal auto-discharge resistance, and as a result the V_OUT pin quickly returns to the V_SS level. The series’ output stabilization capacitor (C_L) is also compatible with low ESR ceramic capacitors.

Output voltage is selectable in 0.05V increments within a range of 0.8V~5.0V, using laser trimming technologies.

The current limiter’s foldback circuit also operates as a short circuit protection for the output current limiter and the output pin. The series achieves a great response with only 25μA of low power consumption. Also the series has low dropout voltage characteristics, which is 80mA at I_OUT=100mA and V_OUT=3.0V.

Typical Application Circuit

Features