LT8710 - Synchronous SEPIC/ Inverting/Boost Controller with Output Current Control

Features

  • Wide Input Range: 4.5V to 80V
  • Rail-to-Rail Output Current Monitor and Control
  • Input Voltage Regulation for High Impedance Inputs
  • C/10 or Power Good Indication Pin
  • MODE Pin for Forced CCM or Pulse-Skipping Operation
  • Switching Frequency Up to 750kHz
  • Easily Configurable as a Boost, SEPIC, Inverting or Flyback Converter with Single Feedback Pin
  • Can Be Synchronized to External Clock
  • High Gain EN/FBIN Pin Accepts Slowly Varying Input Signals
  • 20-Lead TSSOP Package

Typical Application

LT8710 Typical Application
LT8710 Typical Application

Description

The LT®8710 is a synchronous PWM DC/DC controller with a rail-to-rail output current monitor and control. The LT8710 is ideal for many types of power supply topologies and can be easily configured for boost, SEPIC, inverting, or flyback configurations.

The LT8710’s rail-to-rail output current monitor and control allows the part to be configured in current limited applications such as battery charging. The FLAG pin can be used as a power good indication or C/10 indication allowing for accurate bulk and float battery voltages.

The LT8710’s switching frequency range can be set between 100kHz and 750kHz using an external resistor or synchronized to an external clock.

The LT8710 also features innovative EN/FBIN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function. The pin is also used for input voltage regulation to avoid collapsing a high impedance input supply. Additional features such as frequency foldback and soft-start are integrated. The LT8710 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
LT8710EFE#PBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT8710EFE#TRPBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT8710IFE#PBF TSSOP-20 FE I 05-08-1663 (CB) Yes
LT8710IFE#TRPBF TSSOP-20 FE I 05-08-1663 (CB) Yes


LT8710 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
LT8710EFE#PBF TSSOP-20 E $4.87 $3.41 Yes
LT8710EFE#TRPBF TSSOP-20 E $3.47 Yes
LT8710IFE#PBF TSSOP-20 I $5.22 $3.65 Yes
LT8710IFE#TRPBF TSSOP-20 I $3.71 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.

Part Number Description Price Documentation
DC2067A LT8710EFE Inverting Demo Board | 4.5V ≤ VIN ≤ 28V; VOUT: -5V @ 6A $150.00
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Click here to view our complete list of demo boards

Applications

  • High Power Local Power Supply
  • Wide Input Voltage Range SEPIC/Inverting
  • Lead Acid Battery Charger
  • Automotive Engine Control Unit (ECU) Power
  • Solar Panel Power Converter

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Design Tools

LTspice

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LT8710

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