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R1124N251B Datasheet(PDF) 1 Page - RICOH electronics devices division

Part # R1124N251B
Description  LOW NOISE 150mA LDO REGULATOR
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

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R1124N SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-095-0512
1
OUTLINE
The R1124N 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 ICs consists of a voltage reference
unit, an error amplifier, resistor-net for voltage setting, 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 R1124N 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, high
density mounting of the ICs on boards is possible.
FEATURES
• Low Supply Current ............................................................. Typ. 75µA
• Standby Mode ...................................................................... Typ. 0.1µA
• Low Dropout Voltage............................................................ Typ. 0.22V (IOUT=150mA 3.0V Output type)
• High Ripple Rejection .......................................................... Typ. 70dB (f=1kHz 3.0V Output type)
............................................................................................. Typ. 60dB (f
=10kHz)
• Low Temperature-Drift Coefficient of Output Voltage........... Typ. ±100ppm/°C
• Excellent Line Regulation .................................................... Typ. 0.02%/V
• High Output Voltage Accuracy ............................................. ±2.0%
• Small Packages ................................................................. SOT-23-5
• Output Voltage ..................................................................... Stepwise setting with a step of 0.1V in
the range of 1.5V to 4.0V is possible
• Built-in Fold Back Protection Circuit .................................... Typ. 40mA (Current at short mode)
• Ceramic capacitors are recommended to be used with this IC ... CIN=COUT=1µF (VOUT<2.5V)
CIN
=1µF, COUT=0.47µF (VOUT >
= 2.5V)
APPLICATIONS
• Power source for portable communication equipment.
• Power source for electrical appliances such as cameras, VCRs and camcorders.
• Power source for battery-powered equipment.


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