LTC3025

PRODUCTION

LTC3025

300mA Micropower VLDO Linear Regulator

PRODUCTION

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1ku List Price Starting From $1.66

Features

Wide Input Voltage Range: 0.9V to 5.5V
Stable with Ceramic Capacitors
Very Low Dropout: 45mV at 300mA
Adjustable Output Range: 0.4V to 3.6V
±2% Voltage Accuracy over Temperature Supply Load
Low Noise: 80μV_RMS (10Hz to 100kHz)
BIAS Voltage Range: 2.5V to 5.5V

Fast Transient Recovery
Shutdown Disconnects Load from V_IN and V_BIAS
Low Operating Current: I_IN = 4μA, I_BIAS = 50μA Typ
Low Shutdown Current: I_IN = 1μA, I_BIAS = 0.01μA Typ
Output Current Limit
Thermal Overload Protection
Available in 6-Lead (2mm × 2mm) DFN Package

Additional Details

The LTC3025 is a micropower, VLDO^™ (very low dropout) linear regulator which operates from input voltages as low as 0.9V. The device is capable of supplying 300mA of output current with a typical dropout voltage of only 45mV. A BIAS supply is required to run the internal reference and LDO circuitry while output current comes directly from the IN supply for high efficiency regulation. The low 0.4V internal reference voltage allows the LTC3025 output to be programmed to much lower voltages than available in common LDOs (range of 0.4V to 3.6V). The output voltage is programmed via two ultrasmall SMD resistors.

The LTC3025’s low quiescent current makes it an ideal choice for use in battery-powered systems. For 3-cell NiMH and single cell Li-Ion applications, the BIAS voltage can be supplied directly from the battery while the input can come from a high efficiency buck regulator, providing a high efficiency, low noise output.

Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal overload protection and output current limiting. The LTC3025 is available in a tiny, low profile (0.75mm) 6-lead DFN (2mm × 2mm) package.


	Output Current	Output Voltage
LTC3025	300mA	Adj (0.4V to 3.6V)
LTC3025-1	500mA	Adj (0.4V to 3.6V)
LTC3025-2	500mA	1.2V Fixed
LTC3025-3	500mA	1.5V Fixed
LTC3025-4	500mA	1.8V Fixed

APPLICATIONS

Low Power Handheld Devices
Low Voltage Logic Supplies
DSP Power Supplies
Cellular Phones
Portable Electronic Equipment
Handheld Medical Instruments
Post Regulator for Switching Supply Noise Rejection

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $1.66

Technical Documents 5

LTC3025: 300mA Micropower VLDO Linear Regulator Data Sheet (Rev.E) 01/05/2011

R415 Reliability Data 03/23/2018

DC741A - Demo Manual 09/24/2009

AN-140: Basic Concepts of Linear Regulator and Switching Mode Power Supplies 09/01/2019

Power Supply Tracking for Linear Regulators 11/01/2004

Reference Materials 2

Linear Low Dropout (LDO) Regulator Solutions 04/17/2018

300mA VLDO Operates from VIN=0.9V and Maintains Only 45mV of Dropout 08/26/2009

Design Resources 4

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
LTC3025EDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3025EDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3025IDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3025IDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3025EDC#TRMPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3025EDC#TRPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3025IDC#TRMPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3025IDC#TRPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

Companion Parts 2

Parts	Product Life Cycle	Description
Digital Power System Managers1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Single-Supply Monitors1
LTC2935	PRODUCTION	Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

DC741A

LTC3025EDC Demo Board | Low VIN, VLDO Line ar Regulator, 0.9V ≤ VIN ≤ 5.5V, VOUT = 0.8V/1.2V/1.5V/1.8V/Adj @ 300mA

DC741A

LTC3025EDC Demo Board | Low VIN, VLDO Line ar Regulator, 0.9V ≤ VIN ≤ 5.5V, VOUT = 0.8V/1.2V/1.5V/1.8V/Adj @ 300mA

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Product Detail

Demonstration circuit 741 is an ultralow dropout voltage supply using the 300mA output current LTC3025 linear regulator in the small 2mm x 2mm 6-Pin DFN package. The DC741 has an input voltage range from 0.9V to 5.5V and a jumper-selectable output voltage of 0.8V, 1.2V, 1.5V, 1.8V or a user-defined value between 0.4V and 3.6V.

The 0.4V reference of the LTC3025 allows the DC741 to supply power to very low voltage applications. The DC741 is also an excellent choice for post-regulation of step-down switching regulators, creating a high efficiency low-noise supply. The DC741 comes assembled with small ceramic capacitors, showing the LTC3025's ability to maintain stability with ceramic output capacitors.

Resources

PDF

DC741A - Demo Manual

382.00K

PDF

DC741A - Schematic

126.00K

ZIP

DC741A - Design File

699.00K

DC741A

LTC3025EDC Demo Board | Low VIN, VLDO Line ar Regulator, 0.9V ≤ VIN ≤ 5.5V, VOUT = 0.8V/1.2V/1.5V/1.8V/Adj @ 300mA

LTspice 3

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

LTC3025/LTC3406-1.5 Demo Circuit - High Efficiency Step-Down Converter with VLDO (2.7-5.5V to 1.5V @ 600mA & 1.2V @ 300mA)

2.00K

Lt Spice

LTC3035/LTC3025 Demo Circuit - Dual LDO Output (1.7-5.5V to 1.5V/1.8V @ 300mA)

2.00K

Lt Spice

LTC3025 - LDO Linear Regulators

1.1 K

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Terasic DE5-Net Stratix V Board

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Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

View Detailed Reference Design

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Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

View Detailed Reference Design

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Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

View Detailed Reference Design

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Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

View Detailed Reference Design