ADP7159 Datasheet

• Input voltage range: 2.3 V to 5.5 V
• Adjustable output voltage range (V_OUT): 1.2 V to 3.3 V
• Maximum load current: 2 A
• 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: 1.7 nV/√Hz from 10 kHz to 1 MHz
• Power supply rejection ratio (PSRR)
  • 68 dB from 1 kHz to 100 kHz
  • 45 dB at 1 MHz
• Dropout voltage: 200 mV typical at I_OUT = 2 A, V_OUT = 3.3 V
• Initial accuracy: ±0.6% at I_LOAD = 10 mA
• Accuracy over line, load, and temperature: ±1.5%
• See data sheet for additional features

• Regulation to noise sensitive applications: phase-locked loops (PLLs), voltage controlled oscillators (VCOs), and PLLs with integrated VCOs
• Communications and infrastructure
• Backhaul and microwave links

The ADP7159 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 2 A of output current. Output voltages from 1.2 V to 3.3 V are possible depending on the model. Using an advanced proprietary architecture, the device provides high power supply rejection and ultralow noise, achieving excellent line and load transient response with only a 10 μF ceramic output capacitor.

The ADP7159 is available in four models that optimize power dissipation and PSRR performance as a function of the input and output voltage.

The typical output noise of the ADP7159 regulator is 0.9 μV rms from 100 Hz to 100 kHz and 1.7 nV/√Hz for noise spectral density from 10 kHz to 1 MHz. The ADP7159 is available in 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages, making it not only a very compact solution, but also providing excellent thermal performance for applications requiring up to 2 A of output current in a small, low profile footprint.