ADP7157 Series

1.2 A, Ultralow Noise, High PSRR, Adjustable Output, RF Linear Regulator

Catalog

1.2 A, Ultralow Noise, High PSRR, Adjustable Output, RF Linear Regulator

Part	Control Features	Voltage - Output (Max) [Max]	Mounting Type	Current - Output	Output Configuration	PSRR [Min]	PSRR [Max]	Voltage - Input (Max) [Max]	Protection Features	Current - Quiescent (Iq)	Output Type	Voltage - Output (Min/Fixed)	Operating Temperature [Max]	Operating Temperature [Min]	Current - Supply (Max) [Max]	Number of Regulators	Package / Case	Supplier Device Package	Regulator Type	Voltage - Input [Min]	Voltage - Input [Max]	Supplied Contents	Board Type	Channels per IC
Analog Devices ADP7157ACPZ-01-R7	Enable	1.8 V	Surface Mount	1.2 A	Positive	52 dB	70 db	5.5 V	Over Current Over Temperature	8 mA	Adjustable	1.2 V	125 °C	-40 °C	12 mA	1	10-VFDFN Exposed Pad CSP	10-LFCSP-WD (3x3)
Analog Devices ADP7157CP-04-EVALZ				1.2 A															Positive Adjustable	2.3 V	5.5 V	Board(s)	Fully Populated	1 - Single

Catalog

1.2 A, Ultralow Noise, High PSRR, Adjustable Output, RF Linear Regulator

Key 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 noise0.9 µV rms typical output noise from 100 Hz to 100 kHz1.6 µV rms typical output noise from 10 Hz to 100 kHz

• 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 kHz55 dB at 1 MHz

• 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 µA7.0 mA typical at 1.2 A

• 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

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.The ADP7157 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 the ADP7157 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 ADP7157 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 1.2 A of output current in a small, low profile footprint.ApplicationsRegulation to noise sensitive applications: phase-locked loops (PLLs), voltage controlled oscillators (VCOs), and PLLs with integrated VCOsCommunications and infrastructureBackhaul and microwave links