ADP7157

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. B) Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.17

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Overview

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: 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 I_OUT = 1.2 A, V_OUT = 3.3 V
Initial accuracy: ±0.6% at I_LOAD = 10 mA
Accuracy over line, load, and temperature: ±1.5%
Operating supply current (I_GND)
- 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

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.

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

Part Models: 8
1ku List Price: Starting From $3.17

Documentation

Data Sheet 1

ADP7157: 1.2 A, Ultralow Noise, High PSRR, RF Linear Regulator Data Sheet (Rev.B) 03/14/2016

User Guide 1

UG-810: Evaluating the ADP7157 Ultralow Noise, 1.2 A, Adjustable Output, RF Linear Regulator (Rev.A) 03/28/2016

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADP7157ACPZ-01-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ACPZ-02-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ACPZ-03-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ACPZ-04-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ARDZ-01-R7	8-Lead SOIC w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ARDZ-02-R7	8-Lead SOIC w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ARDZ-03-R7	8-Lead SOIC w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP7157ARDZ-04-R7	8-Lead SOIC w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
ADP7156	RECOMMENDED FOR NEW DESIGNS	1.2 A, Ultralow Noise, High PSRR, Fixed Output, RF Linear Regulator

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

ADP7157-01
ADP7157-02
ADP7157-03
ADP7157-04

ADI Linear Regulator Design Tool and Parametric Search

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Open Tool

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

ADP7157 Evaluation Board

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Features and Benefits

Power supply rejection ratio (PSRR)
- 82 dB from 1 kHz to 100 kHz; 55 dB at 1 MHz, V_OUT = 3.3 V, V_IN = 3.8 V
Low noise
- 0.9 µV rms total integrated noise from 100 Hz to 100 kHz
- 1.6 uV rms total integrated noise from 10 Hz to 100 kHz
Noise spectral density: 1.7 nV/√Hz from 10 kHz to 1 MHz
Low dropout voltage: 120 mV typical at V_OUT = 3.3 V, I_OUT = 1.2 A
Maximum output current: 1.2 A
Input voltage range: 2.3 V to 5.5 V
Low quiescent and shutdown current
Initial accuracy: ±0.6% at I_LOAD = 10 mA
Accuracy over line, load, and temperature: ±1.5%
10-lead 3mm x 3mm LFCSP and 8-lead SOIC packages

Product Details

The ADP7157CP-04-EVALZ evaluation board demonstrates the operation and functionality of the ADP7157 ultralow noise, 1.2 A, adjustable output, radio frequency (RF) linear regulator.

Simple device measurements such as line and load regulation, dropout voltage, and ground current can be demonstrated using only a single voltage supply, load resistors, and a voltmeter or an ammeter.

Complete specifications for the ADP7157 ultralow noise, 1.2 A, adjustable output, radio frequency (RF) linear regulator are available in the ADP7157 data sheet available from Analog Devices, Inc., and should be consulted in conjunction with user guide UG-810 when using the evaluation board.

Resources

UG-810: Evaluating the ADP7157 Ultralow Noise, 1.2 A, Adjustable Output, RF Linear Regulator (Rev.A)
3/28/2016

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