ADP7157ACPZ-04-R2 DESCRIPTION
The ADP7157 is an adjustable linear regulator that operatesfrom 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 onthe model. Using an advanced proprietary architecture, thedevice provides high power supply rejection and ultralow noise,achieving excellent line and load transient response with only a10 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
