LTC3769 - 60V Low IQ Synchronous Boost Controller

Features

  • Synchronous Operation for Highest Efficiency and Reduced Heat Dissipation
  • Wide VIN Range: 4.5V to 60V (65V Abs Max); Operates Down to 2.3V After Start-Up
  • Output Voltage Up to 60V
  • ±1% 1.200V Reference Voltage
  • RSENSE or Inductor DCR Current Sensing
  • 100% Duty Cycle Capability for Synchronous MOSFET
  • Low Quiescent Current: 28μA
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Power Good Output Voltage Monitor
  • Low Shutdown Current: 4μA
  • Internal LDO Powers Gate Drive from VBIAS or EXTVCC
  • Thermally Enhanced Low Profile 24-Pin 4mm × 4mm QFN Package and 20-Lead TSSOP Package

Typical Application

LTC3769 Typical Application
LTC3769 Typical Application

Description

LTC®3769 is a high performance single output synchronous boost converter controller that drives an all N-channel power MOSFET stage. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, simplifying high power boost applications. The 28μA no-load quiescent current extends operating run time in battery-powered systems.

A 4.5V to 60V input supply range encompasses a wide range of system architectures and battery chemistries. When biased from the output of the boost converter or another auxiliary supply, the LTC3769 can operate from an input supply as low as 2.3V after start-up. The operating frequency can be set within a 50kHz to 900kHz range or synchronized to an external clock using the internal PLL.

The SS pin ramps the output voltage during start-up. The PLLIN/MODE pin selects Burst Mode® operation, pulse- skipping mode or forced continuous mode at light loads.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

TSSOP-20, 4x4 QFN-24

LTC3769 Package Drawing
LTC3769 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3769EFE#PBF TSSOP 20 E $4.11 $2.88 View
LTC3769EFE#TRPBF TSSOP 20 E $2.94 View
LTC3769EUF#PBF QFN 24 E $3.93 $2.75 View
LTC3769EUF#TRPBF QFN 24 E $2.81 View
LTC3769HFE#PBF TSSOP 20 H $5.30 $3.71 View
LTC3769HFE#TRPBF TSSOP 20 H $3.77 View
LTC3769HUF#PBF QFN 24 H $5.13 $3.59 View
LTC3769HUF#TRPBF QFN 24 H $3.65 View
LTC3769IFE#PBF TSSOP 20 I $4.87 $3.41 View
LTC3769IFE#TRPBF TSSOP 20 I $3.47 View
LTC3769IUF#PBF QFN 24 I $4.70 $3.29 View
LTC3769IUF#TRPBF QFN 24 I $3.35 View
LTC3769MPFE#PBF TSSOP 20 MP $13.20 $9.24 View
LTC3769MPFE#TRPBF TSSOP 20 MP $9.30 View
LTC3769MPUF#PBF QFN 24 MP $12.69 $8.88 View
LTC3769MPUF#TRPBF QFN 24 MP $8.94 View
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
DC2173A LTC3769IUFD Demo Board | Sync Boost, 6V ≤ VIN ≤ 48V, Vout = 48V @ 1.5A to 6A Contact Factory
Buy Now
Click here to view our complete list of demo boards

Applications

  • Industrial
  • Automotive
  • Medical
  • Military

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

LTspiceIV

LTspice IV 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 IV

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 IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV 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 IV:
LTC3769

Technical Support