DESCRIPTION

The UR6223 series is a high speed LDO regulator that features

high accurate, low noise, high ripple rejection, low dropout and low

power consumption. The series consists of a voltage reference, an

error amplifier, a driver transistor, a current limiter, a phase

compensation circuit, a thermal shutdown circuit and an inrush

current protection circuit.

The CE function enables the circuit to be in stand-by mode by

inputting low level signal. In the stand-by mode, the series enables

the electric charge at the output capacitor CL to be discharged via

the internal switch, and as a result the VOUT pin quickly returns to the

VSS level. The output stabilization capacitor CL is also compatible with

low ESR ceramic capacitors.  

The output voltage is selectable  in 0.05V increments within the

range of 1.2V to 4.0V which fixed by laser trimming technologies. The

over current protection circuit and  the thermal shutdown circuit are

built-in.  These two protection  circuits will operate when the output

current reaches current limit level or the junction temperature

reaches temperature limit level.  

FEATURES

* Maximum Output Current :    300mA

* Stand-by Current: 0.1µA (Typ.)

* Low Dropout Voltage: 0.2V (Typ.) (IOUT = 300mA)

* Excellent Line Regulation: 0.01%/V (Typ.)

* High Ripple Rejection: 80dB (Typ.) (f = 1kHz)

*Output Voltages: 2.0~4.0V(Accuracy ± 1%)

                1.2~1.95V(Accuracy ± 20mV)

                0.05V increments