LR7XXYY

DESCRIPTION 

The UTC LR7XXYY series are highly accurate, Dual, low noise, 

CMOS LDO voltage regulators. Performance features of the series 

includes low output noise, high ripple rejection ratio, low dropout 

and very fast turn-on times. 

The UTC LR7XXYY includes a reference voltage source, error 

amplifiers, driver transistors, current limiters and phase 

compensators internally. The LR7XXYY current limiters' foldback 

circuit also operates as a short protect for the output current limiter.

The UTC LR7XXYY series is also fully compatible with low ESR 

ceramic capacitors, reducing cost and improving output stability. 

This high level of output stability is maintained even during

frequent load fluctuations, due to the excellent transient response 

performance and high PSRR achieved across a broad range of 

frequencies. The EN function allows the output of each regulator to 

be turned off independently, resulting in greatly reduced power 

consumption. The output voltage of these ICs is internally fixed with 

high accuracy (1%). 

FEATURES 

* Supply Current Typ. 25µA (each channel) 

* Standby Current Typ. 0.1µA (each channel) 

* Dropout Voltage Typ. 0.21V (IOUT=300mA, VOUT=2.8V) 

Typ. 0.24V (IOUT=300mA, VOUT=2.5V) 

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

* Temperature-Drift Coefficient of Output Voltage Typ. ±30ppm/°C

* Line Regulation Typ. 0.02%/V 

* Output Voltage Accuracy ±1.0% 

* Input Voltage Range 2.5V~5.25V 

* Output Voltage Range 1.5V ~3.3V (0.1V steps) 

 (For details, please refer to MARK 

INFORMATIONS.) 

* Built-in Fold Back Protection Circuit Typ. 50mA 

* Built-in Auto Discharge Function B Version