RP112x Series

Low Noise 150 mA LDO Regulator

No. EA-258-250325

1

OUTLINE

The RP112x is a voltage regulator (LDO) with high output voltage accuracy, low-supply current, low On-

resistance transistor, low noise output voltage and high ripple rejection. Each IC is composed of the followings:

a voltage reference unit, an error amplifier, a resistor-net for output voltage setting, a current limit circuit, and

a chip enable circuit.

The RP112x features ultra-low noise and its Ripple Rejection is as low as 80 dB at f = 1 kHz, 75 dB at f = 10

kHz and 65 dB at f = 100 kHz. The Output Noise is also as low as Typ. 10 μVrms. It is kept the low level at

any Output Voltage. RP112x is suitable for the power source for the portable music player and RF module that

demands for higher level of noise reduction. SOT-23-5 and SC-88A packages, a 1-mm square DFN(PL)1010-

4 package are available.

FEATURES

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Supply Current ................................................... Typ. 75 A

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Standby Current ................................................. Typ. 0.1 A

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Dropout Voltage.................................................. Typ. 0.20 V (IOUT = 150 mA, VOUT = 2.8 V)

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

Typ. 75 dB (f = 10 kHz)

Typ. 65 dB (f = 100 kHz)

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Output Voltage Accuracy .................................... ±1.0%

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Output Voltage Temperature Coefficient.............. Typ. ±30 ppm/C

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Line Regulation .................................................. Typ. 0.02%/V

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Packages ........................................................... DFN(PL)1010-4, SC-88A, SOT-23-5

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Input Voltage Range........................................... 2.0 V to 5.25 V

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Output Voltage Range ........................................ 1.2 V to 4.8 V (0.1 V step)

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Short Current Limit ............................................. Typ. 40 mA

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Built-in Foldback Protection Circuit

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Output Noise ...................................................... Typ. 10 μVrms

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Ceramic capacitors are recommended to be used with this IC .... 1.0 F or more

APPLICATIONS

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Power source for portable communication equipment.

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Power source for electrical appliances such as cameras, VCRs and camcorders.

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Power source for battery-powered equipments.

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Power source for electrical home appliances.

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Power source for the portable music player

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Power source for RF module