LT1370 - 500kHz High Efficiency 6A Switching Regulator

Features

  • Faster Switching with Increased Efficiency
  • Uses Small Inductors: 4.7µH
  • All Surface Mount Components
  • Low Minimum Supply Voltage: 2.7V
  • Quiescent Current: 4.5mA Typ
  • Current Limited Power Switch: 6A
  • Regulates Positive or Negative Outputs
  • Shutdown Supply Current: 12µA Typ
  • Easy External Synchronization
  • Switch Resistance: 0.065Ω Typ

Typical Application

LT1370 Typical Application
LT1370 Typical Application

Description

The LT1370 is a monolithic high frequency current mode switching regulator. It can be operated in all standard switching configurations including boost, buck, flyback, forward, inverting and “Cuk.” A 6A high efficiency switch is included on the die, along with all oscillator, control and protection circuitry.

The LT1370 typically consumes only 4.5mA quiescent current and has higher efficiency than previous parts. High frequency switching allows for very small inductors to be used.

New design techniques increase flexibility and maintain ease of use. Switching is easily synchronized to an external logic level source. A logic low on the Shutdown pin reduces supply current to 12µA. Unique error amplifier circuitry can regulate positive or negative output voltage while maintaining simple frequency compensation techniques. Nonlinear error amplifier transconductance reduces output overshoot on start-up or overload recovery. Oscillator frequency shifting protects external components during overload conditions.

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
LT1370CR#PBF DDPAK-7 R C 05-08-1462 Yes
LT1370CR#TRPBF DDPAK-7 R C 05-08-1462 Yes
LT1370CT7#PBF TO-220 T7 C 05-08-1422 (Standard) Yes
LT1370HVCR#PBF DDPAK-7 R C 05-08-1462 Yes
LT1370HVCR#TRPBF DDPAK-7 R C 05-08-1462 Yes
LT1370HVCT7#PBF TO-220 T7 C 05-08-1422 (Standard) Yes
LT1370HVIR#PBF DDPAK-7 R I 05-08-1462 Yes
LT1370HVIR#TRPBF DDPAK-7 R I 05-08-1462 Yes
LT1370HVIT7#PBF TO-220 T7 I 05-08-1422 (Standard) Yes
LT1370IR#PBF DDPAK-7 R I 05-08-1462 Yes
LT1370IR#TRPBF DDPAK-7 R I 05-08-1462 Yes
LT1370IT7#PBF TO-220 T7 I 05-08-1422 (Standard) Yes


LT1370 Package Drawing
LT1370 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
LT1370CR#PBF DDPAK-7 C $7.40 $6.15 Yes
LT1370CR#TRPBF DDPAK-7 C $6.27 Yes
LT1370CT7#PBF TO-220 C $7.25 $6.05 Yes
LT1370HVCR#PBF DDPAK-7 C $8.45 $7.00 Yes
LT1370HVCR#TRPBF DDPAK-7 C $7.12 Yes
LT1370HVCT7#PBF TO-220 C $8.30 $6.85 Yes
LT1370HVIR#PBF DDPAK-7 I $10.10 $8.35 Yes
LT1370HVIR#TRPBF DDPAK-7 I $8.47 Yes
LT1370HVIT7#PBF TO-220 I $9.95 $8.25 Yes
LT1370IR#PBF DDPAK-7 I $8.90 $7.35 Yes
LT1370IR#TRPBF DDPAK-7 I $7.47 Yes
LT1370IT7#PBF TO-220 I $8.75 $7.25 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
DC185A LT1370CR | 5V or 12V OUTPUT BOOST CONVERTER, 2.7V min Vin, 6A SWITCH $175.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Boost Regulators
  • Laptop Computer Supplies
  • Multiple Output Flyback Supplies
  • Inverting Supplies

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

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

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

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

Models for the following parts are available in LTspice:
LT1370
LT1370HV

Technical Support