LT1764 - 3A, Fast Transient Response, Low Noise, LDO Regulators


  • Optimized for Fast Transient Response
  • Output Current: 3A
  • Dropout Voltage: 340mV at 3A
  • Low Noise: 40µVRMS (10Hz to 100kHz)
  • 1mA Quiescent Current
  • Wide Input Voltage Range: 2.7V to 20V
  • No Protection Diodes Needed
  • Controlled Quiescent Current in Dropout
  • Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
  • Adjustable Output from 1.21V to 20V
  • <1µA Quiescent Current in Shutdown
  • Stable with 10µF Output Capacitor
  • Reverse Battery Protection
  • No Reverse Current
  • Thermal Limiting
  • Available in 5-Lead TO-220, DD and 16-Lead TSSOP Packages

Typical Application

LT1764 Typical Application
LT1764 Typical Application


The LT1764 is a low dropout regulator optimized for fast transient response. The device is capable of supplying 3A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to <1µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the LT1764 has very low output voltage noise which makes the device ideal for sensitive RF supply applications.

Output voltage range is from 1.21V to 20V. The LT1764 regulators are stable with output capacitors as low as 10µF. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The device is available in fixed output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an adjustable device with a 1.21V reference voltage. The LT1764 regulators are available in 5-lead TO-220, DD and Exposed Pad 16-lead TSSOP packages.

LT1764 -
LT1764A Stable With Ceramic Output Capacitors


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
LT1764EFE-1.5#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-1.5#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-1.8#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-1.8#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-2.5#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-2.5#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-3.3#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE-3.3#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EFE#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT1764EQ-1.5#PBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-1.5#TRPBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-1.8#PBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-1.8#TRPBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-2.5#PBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-2.5#TRPBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-3.3#PBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ-3.3#TRPBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ#PBF DDPAK-5 Q E 05-08-1461 Yes
LT1764EQ#TRPBF DDPAK-5 Q E 05-08-1461 Yes
LT1764ET-1.5#PBF TO-220 T E 05-08-1421 (Std) Yes
LT1764ET-1.8#06PBF TO-220 T E 05-08-1421 (Flow 06) Yes
LT1764ET-1.8#PBF TO-220 T E 05-08-1421 (Std) Yes
LT1764ET-2.5#06PBF TO-220 T E 05-08-1421 (Flow 06) Yes
LT1764ET-2.5#PBF TO-220 T E 05-08-1421 (Std) Yes
LT1764ET-3.3#PBF TO-220 T E 05-08-1421 (Std) Yes
LT1764ET#06PBF TO-220 T E 05-08-1421 (Flow 06) Yes
LT1764ET#30PBF TO-220 T E 05-08-1421 (Std) Yes
LT1764ET#31PBF TO-220 T E 05-08-1421 (Std) Yes
LT1764ET#PBF TO-220 T E 05-08-1421 (Std) Yes

LT1764 Package Drawing
LT1764 Package Drawing
LT1764 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
LT1764EFE-1.5#PBF TSSOP-16 E $4.71 $3.30 Yes
LT1764EFE-1.5#TRPBF TSSOP-16 E $3.36 Yes
LT1764EFE-1.8#PBF TSSOP-16 E $4.71 $3.30 Yes
LT1764EFE-1.8#TRPBF TSSOP-16 E $3.36 Yes
LT1764EFE-2.5#PBF TSSOP-16 E $4.71 $3.30 Yes
LT1764EFE-2.5#TRPBF TSSOP-16 E $3.36 Yes
LT1764EFE-3.3#PBF TSSOP-16 E $4.71 $3.30 Yes
LT1764EFE-3.3#TRPBF TSSOP-16 E $3.36 Yes
LT1764EFE#PBF TSSOP-16 E $4.71 $3.30 Yes
LT1764EFE#TRPBF TSSOP-16 E $3.36 Yes
LT1764EQ-1.5#PBF DDPAK-5 E $5.09 $3.30 Yes
LT1764EQ-1.5#TRPBF DDPAK-5 E $3.42 Yes
LT1764EQ-1.8#PBF DDPAK-5 E $5.09 $3.30 Yes
LT1764EQ-1.8#TRPBF DDPAK-5 E $3.42 Yes
LT1764EQ-2.5#PBF DDPAK-5 E $5.09 $3.30 Yes
LT1764EQ-2.5#TRPBF DDPAK-5 E $3.42 Yes
LT1764EQ-3.3#PBF DDPAK-5 E $5.09 $3.30 Yes
LT1764EQ-3.3#TRPBF DDPAK-5 E $3.42 Yes
LT1764EQ#PBF DDPAK-5 E $5.09 $3.30 Yes
LT1764EQ#TRPBF DDPAK-5 E $3.42 Yes
LT1764ET-1.5#PBF TO-220 E $4.21 $3.30 Yes
LT1764ET-1.8#06PBF TO-220 E $4.21 $3.30 Yes
LT1764ET-1.8#PBF TO-220 E $4.21 $3.30 Yes
LT1764ET-2.5#06PBF TO-220 E $4.21 $3.30 Yes
LT1764ET-2.5#PBF TO-220 E $4.21 $3.30 Yes
LT1764ET-3.3#PBF TO-220 E $4.21 $3.30 Yes
LT1764ET#06PBF TO-220 E $4.21 $3.30 Yes
LT1764ET#30PBF TO-220 E $4.71 $3.75 Yes
LT1764ET#31PBF TO-220 E $4.71 $3.75 Yes
LT1764ET#PBF TO-220 E $4.21 $3.30 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.

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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.

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  • 3.3V to 2.5V Logic Power Supply
  • Post Regulator for Switching Supplies

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