LT3790
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LT3790

60V Synchronous 4-Switch Buck-Boost Controller

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Info: : PRODUCTION tooltip
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Part Details
Part Models 8
1ku List Price Starting From $5.66
Features
  • 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Synchronous Switching: Up to 98.5% Efficiency
  • Wide VIN Range: 4.7V to 60V
  • 2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V
  • 6% Output Current Accuracy: 0V ≤ VOUT < 60V
  • Input and Output Current Regulation with Current Monitor Outputs
  • No Top FET Refresh in Buck or Boost
  • VOUT Disconnected from VIN During Shutdown
  • C/10 Charge Termination and Output Shorted Flags
  • Capable of 100W or Greater per IC
  • Easy Parallel Capability to Extend Output Power
  • 38-Lead TSSOP with Exposed Pad
Additional Details
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The LT3790 is a synchronous 4-switch buck-boost voltage/current regulator controller. The LT3790 can regulate output voltage, output current, or input current with input voltages above, below, or equal to the output voltage. The constant-frequency, current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top FET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3790 is ideal for voltage regulator, battery/super-capacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.

The LT3790 provides input current monitor, output current monitor, and various status flags, such as C/10 charge termination and shorted output flag.

APPLICATIONS

  • Automotive, Telecom, Industrial Systems
  • High Power Battery-Powered System
Part Models 8
1ku List Price Starting From $5.66

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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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Jun 29, 2021

- 21_0132

LT3790 Electrical Characteristic Change

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Jul 31, 2020

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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

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PRODUCTION

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PRODUCTION

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LT3790IFE#PBF

PRODUCTION

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PRODUCTION

Jun 29, 2021

- 21_0132

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LT3790 Electrical Characteristic Change

LT3790EFE#PBF

PRODUCTION

LT3790EFE#TRPBF

PRODUCTION

LT3790HFE#PBF

PRODUCTION

LT3790HFE#TRPBF

PRODUCTION

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LT3790MPFE#PBF

PRODUCTION

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PRODUCTION

Jul 31, 2020

- 20_0245

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LT3790EFE#PBF

PRODUCTION

LT3790EFE#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2123B

LT3790 Demo Board | Synchronous Buck-Boost, 8V ≤ VIN ≤ 56V, VOUT = 24V at up to 5A

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DC2123B

LT3790 Demo Board | Synchronous Buck-Boost, 8V ≤ VIN ≤ 56V, VOUT = 24V at up to 5A

LT3790 Demo Board | Synchronous Buck-Boost, 8V ≤ VIN ≤ 56V, VOUT = 24V at up to 5A

Product Detail

The DC2123B is a 60V four-switch synchronous buck-boost controller that demonstrates the high power capability of the LT3790. The output is 24V and the maximum output current is 5A. The switching frequency is 200kHz and efficiency is as high as 98% for a 24V input.


The LT3790 is capable of high power operation. DC2123B can be altered for increased output power with higher minimum input voltage. If VIN remains always above 20V, IOUT can be increased to 12A+ (for 290W output) by changing RS2 to 4mΩ.

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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