■ OUTLINE

The R1121N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ONresistance and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout voltage and a chip enable function. The line transient response and load transient response of the R1121N Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment. The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs are SOT-23-5 (Mini-mold) package, high density mounting of the ICs on boards is possible.

■ FEATURES

Ultra-Low Supply Current.................................................TYP. 35μA

Standby Mode ...................................................................TYP. 0.1μA

Low Dropout Voltage ........................................................TYP. 0.2V (IOUT= 100mA)

High Ripple Rejection .......................................................TYP. 70db (f = 1kHz)

Low Temperature-Drift Coefficient of Output Voltage .....TYP. ±100ppm/°C

Excellent Line Regulation .................................................TYP. 0.05/V

High Accuracy Output Voltage..........................................±2.0

Small Package ..................................................................SOT-23-5 (Mini-mold)

Output Voltage ..................................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.

Built-in chip enable circuit (2 Types; A: active “L”, B: active “H”)

Pinout ................................................................................Similar to the TK112, TK111