LT1965 - 1.1A, Low Noise, Low Dropout Linear Regulator


  • Output Current: 1.1A
  • Dropout Voltage: 310mV
  • Low Noise: 40μVRMS (10Hz to 100kHz)
  • 500μA Quiescent Current (Adjustable Version)
  • Wide Input Voltage Range: 1.8V to 20V
  • No Protection Diodes Needed
  • Controlled Quiescent Current in Dropout
  • Adjustable Output from 1.20V to 19.5V
  • Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
  • < 1μA Quiescent Current in Shutdown
  • Stable with 10μF Output Capacitor
  • Stable with Ceramic or Tantalum Capacitors
  • Reverse-Battery Protection
  • No Reverse Current
  • Current Limit with Foldback Protection
  • Thermal Limiting
  • 5-Lead TO-220, DD-Pak, Thermally Enhanced 8-Lead MSOP and 8-Lead 3mm × 3mm DFN Packages

Typical Application

LT1965 Typical Application
LT1965 Typical Application


The LT®1965 series are low noise, low dropout linear regulators. The devices supply 1.1A of output current with a 310mV typical dropout voltage. Operating quiescent current is 500μA for the adjustable version, reducing to <1μA in shutdown. Quiescent current is well controlled; it does not rise in dropout as with many other regulators. The LT1965 regulators have very low output noise which makes them ideal for sensitive RF and DSP supply applications.

Output voltage ranges from 1.20V to 19.5V. The LT1965 regulators are stable with output capacitors as low as 10μF. Internal protection circuitry includes reverse-battery protection, current limiting with foldback, thermal limiting and reverse-current protection. The LT1965 series are available in fixed output voltages of 1.5V, 1.8V, 2.5V, 3.3V, and as an adjustable device with a 1.20V reference voltage. The package offerings include the 5-lead TO-220, 5-lead DD-Pak as well as the thermally enhanced 8-lead MSOP and low profile (0.75mm) 8-lead 3mm × 3mm DFN.


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

TO-220, DDPAK, MS-8, 3x3 DFN-8

LT1965 Package Drawing
LT1965 Package Drawing
LT1965 Package Drawing
LT1965 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1965EDD-1.5#PBF DFN 8 E $2.69 $1.88 View
LT1965EDD-1.5#TRPBF DFN 8 E $1.94 View
LT1965EDD-1.8#PBF DFN 8 E $2.69 $1.88 View
LT1965EDD-1.8#TRPBF DFN 8 E $1.94 View
LT1965EDD-2.5#PBF DFN 8 E $2.69 $1.88 View
LT1965EDD-2.5#TRPBF DFN 8 E $1.94 View
LT1965EDD-3.3#PBF DFN 8 E $2.69 $1.88 View
LT1965EDD-3.3#TRPBF DFN 8 E $1.94 View
LT1965EDD#PBF DFN 8 E $2.69 $1.88 View
LT1965EDD#TRPBF DFN 8 E $1.94 View
LT1965EMS8E-1.5 MSOP 8 E $2.77 $1.94 View
LT1965EMS8E-1.5#PBF MSOP 8 E $2.77 $1.94 View
LT1965EMS8E-1.5#TRPBF MSOP 8 E $2.00 View
LT1965EMS8E-1.8#PBF MSOP 8 E $2.77 $1.94 View
LT1965EMS8E-1.8#TRPBF MSOP 8 E $2.00 View
LT1965EMS8E-2.5#PBF MSOP 8 E $2.77 $1.94 View
LT1965EMS8E-2.5#TRPBF MSOP 8 E $2.00 View
LT1965EMS8E-3.3 MSOP 8 E $2.77 $1.94 View
LT1965EMS8E-3.3#PBF MSOP 8 E $2.77 $1.94 View
LT1965EMS8E-3.3#TRPBF MSOP 8 E $2.00 View
LT1965EMS8E#PBF MSOP 8 E $2.77 $1.94 View
LT1965EMS8E#TRPBF MSOP 8 E $2.00 View
LT1965EQ DD PAK 5 E $3.14 $2.20 View
LT1965EQ-1.5#PBF DD PAK 5 E $3.14 $2.20 View
LT1965EQ-1.5#TRPBF DD PAK 5 E $2.32 View
LT1965EQ-1.8#PBF DD PAK 5 E $3.14 $2.20 View
LT1965EQ-1.8#TRPBF DD PAK 5 E $2.32 View
LT1965EQ-2.5#PBF DD PAK 5 E $3.14 $2.20 View
LT1965EQ-2.5#TRPBF DD PAK 5 E $2.32 View
LT1965EQ-3.3#PBF DD PAK 5 E $3.14 $2.20 View
LT1965EQ-3.3#TRPBF DD PAK 5 E $2.32 View
LT1965EQ#PBF DD PAK 5 E $3.14 $2.20 View
LT1965EQ#TR DD PAK 5 E $2.32 View
LT1965EQ#TRPBF DD PAK 5 E $2.32 View
LT1965ET-1.5#PBF TO-220 5 E $3.14 $2.20 View
LT1965ET-1.8#PBF TO-220 5 E $3.14 $2.20 View
LT1965ET-2.5#PBF TO-220 5 E $3.14 $2.20 View
LT1965ET-3.3#PBF TO-220 5 E $3.14 $2.20 View
LT1965ET#PBF TO-220 5 E $3.14 $2.20 View
LT1965HQ#PBF DD PAK 5 H $4.00 $2.80 View
LT1965HQ#TRPBF DD PAK 5 H $2.86 View
LT1965HT#PBF TO-220 5 H $4.00 $2.80 View
LT1965HT#TRPBF TO-220 5 H $2.86 View
LT1965IDD-1.5#PBF DFN 8 I $3.09 $2.16 View
LT1965IDD-1.5#TRPBF DFN 8 I $2.22 View
LT1965IDD-1.8#PBF DFN 8 I $3.09 $2.16 View
LT1965IDD-1.8#TRPBF DFN 8 I $2.22 View
LT1965IDD-2.5#PBF DFN 8 I $3.09 $2.16 View
LT1965IDD-2.5#TRPBF DFN 8 I $2.22 View
LT1965IDD-3.3#PBF DFN 8 I $3.09 $2.16 View
LT1965IDD-3.3#TRPBF DFN 8 I $2.22 View
LT1965IDD#PBF DFN 8 I $3.09 $2.16 View
LT1965IDD#TRPBF DFN 8 I $2.22 View
LT1965IMS8E-1.5#PBF MSOP 8 I $3.19 $2.23 View
LT1965IMS8E-1.5#TRPBF MSOP 8 I $2.29 View
LT1965IMS8E-1.8#PBF MSOP 8 I $3.19 $2.23 View
LT1965IMS8E-1.8#TRPBF MSOP 8 I $2.29 View
LT1965IMS8E-2.5#PBF MSOP 8 I $3.19 $2.23 View
LT1965IMS8E-2.5#TRPBF MSOP 8 I $2.29 View
LT1965IMS8E-3.3#PBF MSOP 8 I $3.19 $2.23 View
LT1965IMS8E-3.3#TRPBF MSOP 8 I $2.29 View
LT1965IMS8E#PBF MSOP 8 I $3.19 $2.23 View
LT1965IMS8E#TR MSOP 8 I $2.29 View
LT1965IMS8E#TRPBF MSOP 8 I $2.29 View
LT1965IQ-1.5#PBF DD PAK 5 I $3.62 $2.53 View
LT1965IQ-1.5#TRPBF DD PAK 5 I $2.59 View
LT1965IQ-1.8#PBF DD PAK 5 I $3.62 $2.53 View
LT1965IQ-1.8#TRPBF DD PAK 5 I $2.59 View
LT1965IQ-2.5#PBF DD PAK 5 I $3.62 $2.53 View
LT1965IQ-2.5#TRPBF DD PAK 5 I $2.59 View
LT1965IQ-3.3#PBF DD PAK 5 I $3.62 $2.53 View
LT1965IQ-3.3#TRPBF DD PAK 5 I $2.59 View
LT1965IQ#PBF DD PAK 5 I $3.61 $2.53 View
LT1965IQ#TRPBF DD PAK 5 I $2.59 View
LT1965IT-1.5#PBF TO-220 5 I $3.62 $2.53 View
LT1965IT-1.8#PBF TO-220 5 I $3.62 $2.53 View
LT1965IT-2.5#PBF TO-220 5 I $3.62 $2.53 View
LT1965IT-3.3#31PBF TO-220 5 I $4.26 $2.98 View
LT1965IT-3.3#PBF TO-220 5 I $3.62 $2.53 View
LT1965IT#PBF TO-220 5 I $3.62 $2.53 View
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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
DC1172A LT1965EDD Demo Board | Low Noise, Low Dropout Linear Regulator, 2.3V ≤ VIN ≤ 20V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V @ 1.1A $100.00
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