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Product attributes Property Value
Manufacturer Nisshinbo Micro Devices Inc.
Product Series RP103x
Packaging Tape & Reel (TR) |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 5.25V
Voltage - Output (Min/Fixed) 1.2V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.62V @ 150mA
Current - Output 150mA
Current - Quiescent (Iq) 50 µA
Current - Supply (Max) -
PSRR 75dB (1kHz)
Control Features Enable
Protection Features Over Current
Operating Temperature -40°C ~ 85°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 4-UDFN Exposed Pad
Supplier Device Package DFN(PL)1010-4
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The RP103K121D is a fixed 1.2V LDO regulator from Nisshinbo, capable of delivering 150mA. With a quiescent current of 50 µA and 75dB PSRR at 1kHz, it provides clean, stable power for sensitive electronics. The DFN(PL)1010-4 package is ideal for compact designs.

  • High Noise Rejection: 75dB PSRR at 1kHz ensures clean output for analog circuits.
  • Low Power: 50 µA quiescent current extends battery life.
  • Compact Package: DFN(PL)1010-4 fits space-constrained PCBs.

Digital Core Supplies

Provides a stable 1.2V rail for low-voltage digital cores in MCUs and DSPs, with 75dB PSRR at 1kHz filtering supply noise.

Precision Analog Circuits

High PSRR ensures clean power for op-amps and ADCs requiring low noise at 1.2V.

Battery-Powered Instruments

50 µA quiescent current balances performance and efficiency for handheld meters.

RF Transceivers

Stable 1.2V supply with good ripple rejection improves RF signal integrity.

Portable Medical Devices

Compact DFN(PL)1010-4 package and reliable output support wearable health monitors.

Q: What is the output voltage?
A: The fixed output voltage is 1.2V.
Q: What is the maximum current?
A: The maximum output current is 150mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 0.62V at 150mA.
Q: What is the quiescent current?
A: The quiescent current is 50 µA.
Q: What is the PSRR?
A: The power supply rejection ratio is 75dB at 1kHz.
Base Product Number : RP103K121D
1.2V 150mA DFN(PL)1010-4 High PSRR LDO Linear Regulator Nisshinbo
Q: What is the output voltage?
A: The fixed output voltage is 1.2V.
Q: What is the maximum current?
A: The maximum output current is 150mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 0.62V at 150mA.
Q: What is the quiescent current?
A: The quiescent current is 50 µA.
Q: What is the PSRR?
A: The power supply rejection ratio is 75dB at 1kHz.