R1121N_17 Datasheet, PDF (1/18 Pages) RICOH electronics devices division – LOW NOISE 150mA LDO REGULATOR

R1121N SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-058-111026
OUTLINE
The R1121N 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 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 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)
• Temperature-Drift Coefficient of Output Voltage ............. Typ. ±100ppm/°C
• Line Regulation ............................................................... Typ. 0.05%/V
• Output Voltage Accuracy................................................. ±2.0%
• Output Voltage Range..................................................... 1.5V to 5.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
• Package ........................................................................ SOT-23-5 (Mini-mold)
• Built-in chip enable circuit ( 2 types; A: active “L”, B: active “H”)
• Pin-out............................................................................. Similar to the TK112,TK111
APPLICATIONS
• Power source for cellular phones such as GSM, CDMA and various kinds of PCSs.
• Power source for domestic appliances such as cameras, VCRs and camcorders.
• Power source for battery-powered equipment.
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