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High Quality LDO Regulators for Audio Circuits
June 20, 2023
High Quality LDO Regulators for Audio Circuits
LDO (low-dropout) regulators are voltage regulators that offer advantages when used in audio circuits where a stable and clean DC voltage is required to power sensitive audio components such as amplifiers, digital-to-analog converters (DACs), and analog-to-digital converters (ADCs).
Discover how our low-noise low-dropout regulators can enhance the performance and quality of your audio devices
Here are some advantages of using LDO regulators in audio circuits:
Low noise
LDO regulators typically have low output noise and provide a clean, stable voltage output. This is important in audio circuits where even small amounts of noise can negatively affect the quality of the audio signal.
Fast transient response LDO regulators are designed to respond quickly to changes in the input voltage, providing a stable output voltage even when the input voltage fluctuates. This is important in audio circuits where sudden changes in voltage can cause distortion or noise in the audio signal.
Low dropout voltage
LDO regulators have a low dropout voltage, which means that they can maintain a stable output voltage even when the input voltage is only slightly higher than the desired output voltage. This is important in audio circuits where the input voltage may vary depending on the source and the load.
High PSRR
LDO regulators have a high-power supply rejection ratio (PSRR), which means that they can effectively filter out noise and ripple from the input voltage, providing a clean and stable output voltage even in noisy environments.
Small size
LDO regulators are often available in small surface-mount packages, making them ideal for use in portable or compact audio devices where space is limited.
PN | Type | Iq | Iout | en | PSRR | Vin | Vout | Features |
RP122 | Positive | 10uA | 400mA | 8uVrms | 90dB @ 1KHz 65dB @ 100KHz | 1.9V ~ 5.25V | 1.2V ~ 4.8V | Fixed |
RP123 | Positive | 10uA | 250mA | 8uVrms | 90dB @ 1KHz 65dB @ 100KHz | 1.9V ~ 5.25V | 1.2V ~ 4.8V | Fixed |
NJW4109 | Positive | 90uA | 500mA | 50dB @ 1KHz 26Db @ 100KHz | 4.0V ~ 40V | Max +1.0% | Fixed | |
NR1600 | Positive | 80uA | 500mA | 75dB @ 1KHz 70dB @ 10KHz | 1.4V ~ 5.5V | 1.0V ~ 4.8V | Fixed Adjustable Soft-Start | |
RP117 | Negative | 75uA | 100mA | 16uVrms | 80dB @ 1KHz 50dB @ 100KHz | -10V ~ -2.5V | -5.5V ~ -1.0V | Fixed |
Nisshinbo offers a wide range of LDO Regulators in Fixed, Adjustable and Switchable configurations. Above is a ‘snap-shot’ of what is available but we supply many others - please contact us with your requirements.