R1111N SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-057-120206
OUTLINE
The R1111N Series are CMOS-based voltage regulator ICs with high output voltage accuracy, extremely low
supply current, low ON-resistance, and high Ripple Rejection. 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 R1111N 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 is SOT-23-5
(Mini-mold) package , high density mounting of the ICs on boards is possible.
FEATURES
• Supply Current............................................................Typ. 35μA
• Standby Mode.............................................................Typ. 0.1μA
• Dropout Voltage ..........................................................Typ. 0.2V (IOUT=100mA)
• Ripple Rejection..........................................................Typ. 70dB(f=1kHz)
• Output Voltage ............................................................1.5V to 5.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
• Output Voltage Accuracy.............................................±2.0%
• Low Temperature-Drift Coefficient of Output Voltage..Typ. ±100ppm/°C
• Line Regulation...........................................................Typ. 0.05%/V
• Package ....................................................................SOT-23-5
• Built-in chip enable circuit ( 2 types; A: active “L”, B: active “H”)
• Built-in Fold Back Protection Circuit .......................... Typ. 50mA (Current at short mode)
• Pin-out.........................................................................Similar to the LP2980
APPLICATIONS
• Power source for cellular phones such as GSM, CDMA and various kinds of PCSs.
• Power source for electrical appliances such as cameras, VCRs and camcorders.
• Power source for battery-powered equipment.
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