Analog Devices RF and microwave components are available as drop-in X-MWblocks^®
from Quantic^™ X-Microwave.

Get the X-MWblock® drop-in module for this part.

LT3045-1

Name: LT3045-1
Brand: Analog Devices
Price: 4.27 USD
Availability: InStock

RECOMMENDED FOR NEW DESIGNS

20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator with VIOC Control

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $4.27

Viewing:

Overview

Ultralow RMS Noise: 0.8μV_RMS (10Hz to 100kHz)
Ultralow Spot Noise: 2nV/√Hz at 10kHz
Ultrahigh PSRR: 76dB at 1MHz
Output Current: 500mA
Wide Input Voltage Range: 1.8V to 20V
Single Capacitor Improves Noise and PSRR
100μA SET Pin Current: ±1% Initial Accuracy
VIOC Pin Controls Upstream Regulator to Minimize Power Dissipation
Single Resistor Programs Output Voltage
Programmable Current Limit

Low Dropout Voltage: 260mV
Output Voltage Range: 0V to 15V
Programmable Power Good
Fast Start-Up Capability
Precision Enable/UVLO
Parallelable for Lower Noise and Higher Current
Internal Current Limit with Foldback
Minimum Output Capacitor: 10μF Ceramic
Reverse Battery and Reverse Current Protection
12-Lead MSOP and 3mm × 3mm DFN Packages

The LT3045-1 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3045-1 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB. In addition to the LT3045 feature set, the LT3045-1 incorporates a VIOC tracking function to control an upstream switching converter to maintain a constant voltage across the LT3045-1 and hence minimize power dissipation.

The device supplies 500mA at a typical 260mV dropout voltage. Operating quiescent current is nominally 2.3mA and drops to <<1μA in shutdown. The LT3045-1’s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capability and programmable power good to indicate output voltage regulation.

The LT3045-1 is stable with a minimum 10μF ceramic output capacitor. Built-in protection includes reverse battery protection, reverse current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3045-1 is available in thermally enhanced 12-Lead MSOP and 3mm × 3mm DFN packages.


	VIOC Function
LT3045-1	Yes
LT3045	No

Applications

RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs
Very Low Noise Instrumentation
High Speed/High Precision Data Converters
Medical Applications: Imaging, Diagnostics
Post-Regulator for Switching Supplies

Part Models: 8
1ku List Price: Starting From $4.27

Documentation

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
LT3045EDD-1#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045EDD-1#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045EMSE-1#PBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045EMSE-1#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045IDD-1#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045IDD-1#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045IMSE-1#PBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3045IMSE-1#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LT3045EMSE-1#PBF	PRODUCTION
LT3045EMSE-1#TRPBF	PRODUCTION
LT3045IMSE-1#PBF	PRODUCTION
LT3045IMSE-1#TRPBF	PRODUCTION

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Power System Management (PSM) & Sequencers 1
LTC2975	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement

Parts	Product Life Cycle	Description
LT3042	RECOMMENDED FOR NEW DESIGNS	20V, 200mA, Ultralow Noise, Ultrahigh PSRR RF Linear Regulator
LT3045	RECOMMENDED FOR NEW DESIGNS	20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LT3045
LT3045-1

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

LT3045EDD-1 Demo Board | 20V, 2A (4 ICs in Parallel) Ultralow Noise, Ultrahigh PSRR LDO Regulator

Buy Now View Details

Product Details

Demo circuit 2637A features four LT3045EDD-1s in parallel, generating an ultralow noise, ultrahigh power supply rejection ratio (PSRR) low dropout (LDO) regulator with programmable current limit. DC2637A operates over an input range of 3.8V to 20V, and is capable of delivering up to 2A output current by paralleling four LT3045EDD-1s with only 20mΩ ballast resistors.

The VIOC tracking function of the LT3045EDD-1 controls an upstream switching converter to maintain a constant voltage across the regulator and hence minimize power dissipation. In the parallel configuration, connect the VIOC pin of only one IC to the switching converter, while the VIOC pins of the other ICs are left floating. The power good feedback (PGFB) pin is used to set a programmable power good threshold, and also activates the fast start-up circuitry. The PGFB is set on only one IC when they are paralleled. LT3045-1 also offers programmable current limit functionality by connecting a resistor from ILIM to GND on each device. Current monitoring is also achieved by sensing the ILIM pin voltage.

Built-in protection includes reverse battery protection, reverse current protection, internal current limit with fold-back, and thermal limit with hysteresis.

The LT3045-1 data sheet gives a complete description of the device, operation and applications information. The data sheet must be read in conjunction with this demo manual for demonstration circuit 2637A. The LT3045EDD-1 is assembled in a 12-lead (3mm × 3mm) plastic DFN package with an exposed pad on the bottom-side of the IC. Proper board layout is essential for maximum thermal performance.

Resources

DC2637A - Demo Board Manual
6/5/2018

DC2637A - Schematics
1/25/2018

DC2637A - Design Files
1/25/2018

LT3045-1 Signal Chain Evaluation Board | 500mA Ultra Low Noise Positive LDO

Buy Now View Details

Product Details

Demonstration circuit SCP-LT3045-1-EVALZ is a 20V, 500mA Low Dropout (LDO) regulator designed best in class low noise operation in noise sensitive circuits. It is easily configured for a wide output range and can provide extremely quiet operation with its high PSRR.

Like all boards in the Signal Chain Power series, this board is designed to be easily plugged into other SCP boards to form a complete signal chain power system, enabling fast evaluation of low power signal chains. To evaluate this board, some universal SCP hardware is required, namely:

SCP-INPUT-EVALZ
SCP-OUTPUT-EVALZ
SCP-1X5BKOUT-EVALZ
SCP-THRUBRD-EVALZ

SCP-FILTER-EVALZ
SCP-1X2BKOUT-EVALZ
SCP-5X1-EVALZ

To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design.

Note that the Demo Manual does not cover details important to the operation and configuration regarding the LT3045-1. Please refer to the LT3045-1 data sheet for a complete description of the part.

Resources

SCP-LT3045-1-EVALZ - Demo Manual (Rev.0)
2/1/2021

SCP-LT3045-1-EVALZ - Schematic
2/1/2021

SCP-LT3045-1-EVALZ - Design Files
2/1/2021

LT3045EDD-1 Demo Board | Ultralow Noise LDO, 3.8V ≤ VIN ≤ 20V, VOUT = 3.3V @ 500mA

Buy Now View Details

Product Details

Demonstration circuit 2593A features the LT3045EDD-1, a 500mA, ultralow noise, and ultrahigh power supply rejection ratio (PSRR) low dropout (LDO) regulator with programmable current limit. DC2593A operates over an input range of 3.8V to 20V and has a 3.3V output. The LT3045-1 incorporates a VIOC tracking function to control an upstream switching converter to maintain a constant voltage across the LT3045-1 and hence minimize power dissipation.