ADM7155

Data Sheet 600 mA, Ultralow Noise, High PSRR, RF Linear Regulator ADM7155 FEATURES Input voltage range: 2.3 V to 5.5 V Output voltage range: 1.2 V to 3.4 V Maximum load current: 600 mA Low noise 0.9 μV rms total integrated noise from 100 Hz to 100 kHz 1.6 μV rms total integrated noise from 10 Hz to 100 kHz Noise spectral density: 1.5 nV/√Hz from 10 kHz to 1 MHz PSRR: >90 dB from 200 Hz to 200 kHz; 57 dB at 1 MHz Dropout voltage: 120 mV typical at VOUT = 3.3 V, IOUT = 600 mA Initial accuracy: ±0.5% Accuracy over line, load, and temperature: −2.0% (minimum), +1.5% (maximum) Quiescent current, IGND = 4 mA at no load Low shutdown current: 0.2 μA Stable with a 10 μF ceramic output capacitor 8-lead LFCSP and 8-lead SOIC packages Precision enable Supported by ADIsimPower tool APPLICATIONS Regulation to noise sensitive applications: PLLs, VCOs, and PLLs with integrated VCOs Communications and infrastructure Backhaul and microwave links GENERAL DESCRIPTION The ADM7155 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 600 mA of load current. Output voltages from 1.2 V to 3.4 V are possible depending on the model. Using an advanced proprietary architecture, it provides high power supply rejection and ultralow noise, achieving excellent line and load transient response with only a 10 μF ceramic output capacitor. The ADM7155 is available in four models that optimize power dissipation and PSRR performance as a function of input and output voltage. Se...