ADP7157ACPZ-04-R2                                     DESCRIPTION

The ADP7157 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 1.2 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.

ADP7157ACPZ-04-R2                                     FEATURES

Input voltage range: 2.3 V to 5.5 V

Adjustable output voltage range (VOUT): 1.2 V to 3.3 V

Maximum load current: 1.2 A

Low noise

0.9 μV rms typical output noise from 100 Hz to 100 kHz

1.6 μV rms typical output 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)

82 dB from 1 kHz to 100 kHz

55 dB at 1 MHz

Dropout voltage: 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V

Initial accuracy: ±0.6% at ILOAD = 10 mA

Accuracy over line, load, and temperature: ±1.5%

Operating supply current (IGND)

4.0 mA typical at 0 μA

7.0 mA typical at 1.2 A

Low shutdown current: 0.2 μA typical

Stable with a 10 μF ceramic output capacitor

10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages

Precision enable

Supported by ADIsimPower tool

ADP7157ACPZ-04-R2                                     APPLICATIONS

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