LTC3025 - 300mA Micropower VLDO Linear Regulator

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: 80μVRMS (10Hz to 100kHz)
  • BIAS Voltage Range: 2.5V to 5.5V
  • Fast Transient Recovery
  • Shutdown Disconnects Load from VIN and VBIAS
  • Low Operating Current: IIN = 4μA, IBIAS = 50μA Typ
  • Low Shutdown Current: IIN = 1μA, IBIAS = 0.01μA Typ
  • Output Current Limit
  • Thermal Overload Protection
  • Available in 6-Lead (2mm × 2mm) DFN Package
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LTC3025 Typical Application
LTC3025 Typical Application

Description

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

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC3025EDC#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025IDC#PBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC#TRMPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC#TRPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes


LTC3025 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3025EDC#PBF 2x2 DFN-6 E $1.77 Yes
LTC3025EDC#TRMPBF 2x2 DFN-6 E $1.77 $1.28 Yes
LTC3025EDC#TRPBF 2x2 DFN-6 E $1.77 $1.24 Yes
LTC3025IDC#PBF 2x2 DFN-6 I $1.94 Yes
LTC3025IDC#TRMPBF 2x2 DFN-6 I $1.94 $1.41 Yes
LTC3025IDC#TRPBF 2x2 DFN-6 I $1.94 $1.36 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC741A LTC3025EDC Demo Board | Low VIN, VLDO Linear Regulator, 0.9V ≤ VIN ≤ 5.5V, Vout = 0.8V/1.2V/1.5V/1.8V/Adj @ 300mA $75.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3025IDC#PBF 2x2 DFN-6 I $1.94 Yes
LTC3025IDC#TRMPBF 2x2 DFN-6 I $1.94 $1.41 Yes
LTC3025IDC#TRPBF 2x2 DFN-6 I $1.94 $1.36 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

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To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LTC3025
LTC3025-1
LTC3025-2
LTC3025-3
LTC3025-4

Technical Support