LT1076 - Step-Down Switching Regulator


  • 5A Onboard Switch (LT1074)
  • Operates Up to 60V Input
  • 100kHz Switching Frequency
  • Greatly Improved Dynamic Behavior
  • Available in Low Cost 5 and 7-Lead Packages
  • Only 8.5mA Quiescent Current
  • Programmable Current Limit
  • Micropower Shutdown Mode

Typical Application

LT1076 Typical Application
LT1076 Typical Application


The LT1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A.

The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs.

On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations.

The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details.

A fixed 5V output, 2A version is also available. See LT1076-5.


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
LT1076CQ#PBF DDPAK-5 Q C 05-08-1461 Yes
LT1076CQ#TRPBF DDPAK-5 Q C 05-08-1461 Yes
LT1076CR#PBF DDPAK-7 R C 05-08-1462 Yes
LT1076CR#TRPBF DDPAK-7 R C 05-08-1462 Yes
LT1076CT#06PBF TO-220 T C 05-08-1421 (Flow 06) Yes
LT1076CT#30PBF TO-220 T C 05-08-1421 (Std) Yes
LT1076CT#PBF TO-220 T C 05-08-1421 (Std) Yes
LT1076CT7#PBF TO-220 T7 C 05-08-1422 (Std) Yes
LT1076HVCR#PBF DDPAK-7 R C 05-08-1462 Yes
LT1076HVCR#TRPBF DDPAK-7 R C 05-08-1462 Yes
LT1076HVCT#06PBF TO-220 T C 05-08-1421 (Flow 06) Yes
LT1076HVCT#PBF TO-220 T C 05-08-1421 (Std) Yes
LT1076HVCT7#PBF TO-220 T7 C 05-08-1422 (Std) Yes
LT1076HVIR#PBF DDPAK-7 R I 05-08-1462 Yes
LT1076HVIR#TRPBF DDPAK-7 R I 05-08-1462 Yes
LT1076HVIT#06PBF TO-220 T I 05-08-1421 (Flow 06) Yes
LT1076HVIT#PBF TO-220 T I 05-08-1421 (Std) Yes
LT1076IQ#PBF DDPAK-5 Q I 05-08-1461 Yes
LT1076IQ#TRPBF DDPAK-5 Q I 05-08-1461 Yes
LT1076IR#PBF DDPAK-7 R I 05-08-1462 Yes
LT1076IR#TRPBF DDPAK-7 R I 05-08-1462 Yes
LT1076IT#06PBF TO-220 T I 05-08-1421 (Flow 06) Yes
LT1076IT#PBF TO-220 T I 05-08-1421 (Std) Yes

LT1076 Package Drawing
LT1076 Package Drawing
LT1076 Package Drawing
LT1076 Package Drawing
LT1076 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
LT1076CQ#PBF DDPAK-5 C $5.00 $3.95 Yes
LT1076CQ#TRPBF DDPAK-5 C $4.07 Yes
LT1076CR#PBF DDPAK-7 C $5.42 $4.30 Yes
LT1076CR#TRPBF DDPAK-7 C $4.42 Yes
LT1076CT#06PBF TO-220 C $4.33 $3.40 Yes
LT1076CT#30PBF TO-220 C $4.78 $3.85 Yes
LT1076CT#PBF TO-220 C $4.33 $3.40 Yes
LT1076CT7#PBF TO-220 C $5.00 $3.95 Yes
LT1076HVCR#PBF DDPAK-7 C $9.42 $7.45 Yes
LT1076HVCR#TRPBF DDPAK-7 C $7.57 Yes
LT1076HVCT#06PBF TO-220 C $7.58 $6.00 Yes
LT1076HVCT#PBF TO-220 C $7.58 $6.00 Yes
LT1076HVCT7#PBF TO-220 C $8.75 $6.90 Yes
LT1076HVIR#PBF DDPAK-7 I $10.95 $9.05 Yes
LT1076HVIR#TRPBF DDPAK-7 I $9.17 Yes
LT1076HVIT#06PBF TO-220 I $8.92 $7.35 Yes
LT1076HVIT#PBF TO-220 I $8.92 $7.35 Yes
LT1076IQ#PBF DDPAK-5 I $5.80 $4.75 Yes
LT1076IQ#TRPBF DDPAK-5 I $4.87 Yes
LT1076IR#PBF DDPAK-7 I $6.30 $5.15 Yes
LT1076IR#TRPBF DDPAK-7 I $5.27 Yes
LT1076IT#06PBF TO-220 I $5.92 $4.85 Yes
LT1076IT#PBF TO-220 I $5.92 $4.85 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.

Click here to view our complete list of demo boards


  • Buck Converter with Output Voltage Range of 2.5V to 50V
  • Tapped-Inductor Buck Converter with 10A Output at 5V
  • Positive-to-Negative Converter
  • Negative Boost Converter
  • Multiple Output Buck Converter

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