LTC3025-1/LTC3025-2/LTC3025-3/LTC3025-4 - 500mA Micropower VLDO Linear Regulators


  • Wide Input Voltage Range: 0.9V to 5.5V
  • Stable with Ceramic Capacitors
  • Very Low Dropout: 85mV at 500mA
  • Adjustable Output Range: 0.4V to 3.6V (LTC3025-1)
  • Fixed Output: 1.2V(LTC3025-2), 1.5V(LTC3025-3), 1.8V(LTC3025-4)
  • ±2% Voltage Accuracy over Temperature, Supply and 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

Typical Application

LTC3025-1 Typical Application
LTC3025-1 Typical Application


The LTC®3025-X 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 500mA of output current with a typical dropout voltage of only 85mV. 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 LTC3025-1 features an adjustable output with a low 0.4V reference while the LTC3025-2, LTC3025-3, and LTC3025-4 have fixed 1.2V, 1.5V and 1.8V output voltages respectively.

The LTC3025-X’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-X 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


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
LTC3025EDC-1#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-1#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-1#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-2#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-2#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-2#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-3#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-3#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-3#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-4#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-4#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025EDC-4#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3025IDC-1#PBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-1#TRMPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-1#TRPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-2#PBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-2#TRMPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-2#TRPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-3#PBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-3#TRMPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-3#TRPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-4#PBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-4#TRMPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes
LTC3025IDC-4#TRPBF 2x2 DFN-6 DC6 I 05-08-1703 Yes

LTC3025-1 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
LTC3025EDC-1#PBF 2x2 DFN-6 E $1.97 Yes
LTC3025EDC-1#TRMPBF 2x2 DFN-6 E $1.97 $1.43 Yes
LTC3025EDC-1#TRPBF 2x2 DFN-6 E $1.97 $1.38 Yes
LTC3025EDC-2#PBF 2x2 DFN-6 E $1.97 Yes
LTC3025EDC-2#TRMPBF 2x2 DFN-6 E $1.97 $1.43 Yes
LTC3025EDC-2#TRPBF 2x2 DFN-6 E $1.97 $1.38 Yes
LTC3025EDC-3#PBF 2x2 DFN-6 E $1.97 Yes
LTC3025EDC-3#TRMPBF 2x2 DFN-6 E $1.97 $1.43 Yes
LTC3025EDC-3#TRPBF 2x2 DFN-6 E $1.97 $1.38 Yes
LTC3025EDC-4#PBF 2x2 DFN-6 E $1.97 Yes
LTC3025EDC-4#TRMPBF 2x2 DFN-6 E $1.97 $1.43 Yes
LTC3025EDC-4#TRPBF 2x2 DFN-6 E $1.97 $1.38 Yes
LTC3025IDC-1#PBF 2x2 DFN-6 I $2.17 Yes
LTC3025IDC-1#TRMPBF 2x2 DFN-6 I $2.17 $1.57 Yes
LTC3025IDC-1#TRPBF 2x2 DFN-6 I $2.17 $1.52 Yes
LTC3025IDC-2#PBF 2x2 DFN-6 I $2.17 Yes
LTC3025IDC-2#TRMPBF 2x2 DFN-6 I $2.17 $1.57 Yes
LTC3025IDC-2#TRPBF 2x2 DFN-6 I $2.17 $1.52 Yes
LTC3025IDC-3#PBF 2x2 DFN-6 I $2.17 Yes
LTC3025IDC-3#TRMPBF 2x2 DFN-6 I $2.17 $1.57 Yes
LTC3025IDC-3#TRPBF 2x2 DFN-6 I $2.17 $1.52 Yes
LTC3025IDC-4#PBF 2x2 DFN-6 I $2.17 Yes
LTC3025IDC-4#TRMPBF 2x2 DFN-6 I $2.17 $1.57 Yes
LTC3025IDC-4#TRPBF 2x2 DFN-6 I $2.17 $1.52 Yes
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* 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
DC1283A LTC3025EDC-1 Demo Board | Micropower VLDO Linear Regulator, 0.9V ≤ VIN ≤ 5.5V, Vout = 0.8V/1.2V/1.5V/1.8V/Adj @ 500mA $75.00
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