LT8714 - Bipolar Output Synchronous Controller with Seamless Four Quadrant Operation

Features

  • Bipolar Output Cleanly Transitions Through 0V
  • Output Can Source or Sink Current for Any Output Voltage
  • CTRL Pin Externally Sets Output Voltage
  • Wide Input Range: 4.5V to 80V
  • Power Good Indication Pin (PG)
  • Switching Frequency Up to 750kHz
  • Can Be Synchronized to an External Clock
  • High Gain EN Pin Accepts Slowly Varying Input Signals
  • 20-Lead TSSOP Exposed Pad Package

Typical Application

LT8714 Typical Application
LT8714 Typical Application

Description

The LT®8714 is a synchronous PWM DC/DC controller designed for a four quadrant output converter. The output voltage cleanly transitions through zero volts with sourcing and sinking output current capability.

The LT8714 is ideal for regulating to positive, negative, or zero volts when configured for the novel four quadrant topology. Applications include four quadrant power supplies, high power bidirectional current sources, active loads, and high power, low frequency signal amplification. In addition, the LT8714 incorporates a power good feature to let the user know if VOUT is above or below its target regulation voltage.

The LT8714’s switching frequency range can be programmed between 100kHz and 750kHz via a resistor from the RT pin to GND. A SYNC pin is also provided if the user would like to synchronize the part to an external clock. Additional features such as current limiting and soft-start are included. The LT8714 is available in a 20‑lead TSSOP package.

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
LT8714EFE#PBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT8714EFE#TRPBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT8714IFE#PBF TSSOP-20 FE I 05-08-1663 (CB) Yes
LT8714IFE#TRPBF TSSOP-20 FE I 05-08-1663 (CB) Yes


LT8714 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
LT8714EFE#PBF TSSOP-20 E $5.22 $3.65 Yes
LT8714EFE#TRPBF TSSOP-20 E $3.71 Yes
LT8714IFE#PBF TSSOP-20 I $5.63 $3.94 Yes
LT8714IFE#TRPBF TSSOP-20 I $4.00 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
DC2240A LT8714EFE Demo Board | Sync 4-Quadrant Controller, 10V ≤ VIN ≤ 14V, -5V ≤ VOUT ≤ 5V @ 5A $200.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Four Quadrant Power Supplies
  • Bidirectional Current Sources
  • High Power, Low Frequency Signal Amplification
  • Test and Measurement
  • Electronic Window Tinting

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:

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

Models for the following parts are available in LTspice:
LT8714

Technical Support