LT1766
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LT1766

5.5V to 60V 1.5A, 200kHz Step-Down Switching Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 18
1ku List Price Starting From $4.37
Features
  • Wide Input Range: 5.5V to 60V
  • 1.5A Peak Switch Current
  • Constant 200kHz Switching Frequency
  • Saturating Switch Design: 0.2Ω
  • Peak Switch Current Rating Maintained Over Full Duty Cycle Range
  • Low Effective Supply Current: 2.5mA
  • Low Shutdown Current: 25μA
  • 1.2V Feedback Reference Voltage (LT1766)
  • 5V Fixed Output (LT1766-5)
  • Easily Synchronizable
  • Cycle-by-Cycle Current Limiting
  • Small 16-Pin SSOP and Thermally Enhanced TSSOP Packages
Additional Details
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The LT1766/LT1766-5 are 200kHz monolithic buck switching regulators that accept input voltages up to 60V. A high efficiency 1.5A, 0.2Ω switch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode control architecture delivers fast transient response and excellent loop stability.

Special design techniques and a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range. A shutdown pin reduces supply current to 25μA and the device can be externally synchronized from 228kHz to 700kHz with logic-level inputs.

The LT1766/LT1766-5 are available in a 16-pin fused-lead SSOP package or a TSSOP package with exposed backside for improved thermal performance.

Applications

  • High Voltage, Industrial and Automotive
  • Portable Computers
  • Battery-Powered Systems
  • Battery Chargers
  • Distributed Power Systems
Part Models 18
1ku List Price Starting From $4.37

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

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Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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Oct 11, 2022

- 22_0235

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Epoxy Change from Henkel 8290 to 8290A for GN Package

LT1766EGN#PBF

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LT1766EGN#TRPBF

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PRODUCTION

Apr 6, 2022

- 22_0066

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Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LT1766EGN#PBF

PRODUCTION

LT1766EGN#TRPBF

PRODUCTION

LT1766EGN-5#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC326B

LT1766EGN | 200KHz High Voltage Buck Converter, 5.5 - 60VIN @ up to 1A, Jumper Selectable 3.3 or 5VOUT

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DC326C

LT1766EFE | 1.5A, 200kHz High Voltage Buck Converter, VIN = 6V-60V, VOUT = 5V @ 1A

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, 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.

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