System-level hardware designers pay careful attention to selecting the right analog signal path ICs for their specific applications. Each IC needs “clean” power but often, power management is the last part of a system design. As many designers know, power supply design affects the analog signal integrity which, ultimately, impacts overall system performance.
National Semiconductor’s broad portfolio of low-noise, low dropout (LDO) regulators preserve signal fidelity in the analog signal path over a wide range of input voltages and output currents. National’s portfolio of low-noise LDOs provide maximum Power Supply Rejection Ratio (PSRR) and low output voltage noise for low-power, space-constrained applications. In contrast to switching regulators which induce a voltage ripple and other high frequency voltage spikes in their output, an LDO’s PSRR filters out unwanted noise.
Low Dropout Regulators Deliver Quiet Power for Noise-Sensitive Circuits - [Link]