LR9XXYY

DESCRIPTION 

The UTC LR9XXYY Series are a low dropout regulator with 

high output voltage accuracy, low quiescent current, low dropout, 

and high ripple rejection. This regulator is based on a CMOS 

process. Each of these regulator ICs contains dual LDO regulator, 

both of them includes a voltage reference, an error amplifier, 

resistors for setting Output Voltage, a current limit circuit, and a 

chip enable circuit. 

The UTC LR9XXYY Series exhibit ultra excellent line transient 

response and load transient response, thus they are very suitable 

for the power supply for hand-held communication equipment. 

FEATURES 

* Supply Current: TYP. 50μA×2 (VR1&VR2) 

* Standby Current: TYP. 0.1μA×2 (VR1&VR2) 

* Input Voltage Range: 1.4V~5.25V 

* Output Voltage Range: 0.8V~3.7V (0.1V steps) 

(For details, please refer to MARK SPECIFICATION TABLE) 

* Output Voltage Accuracy: ±1.0% (VSET>2.0V, TOPT=25°C) 

* Dropout Voltage: TYP. 0.25V (IOUT=300mA, VSET=2.5V) 

* Ripple Rejection: TYP. 75dB (f=1kHz) 

* Line Regulation: TYP. 0.02%/V 

* Built-in Fold Back Protection Circuit: TYP. 60mA 

(Current at short mode) 

* Ceramic capacitors are recommended to be used with this IC: 

1.0μF or more