LT1765
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LT1765

Monolithic 3A, 1.25MHz Step-Down Switching Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $5.56
Features
  • 3A Switch in a Thermally Enhanced 16-Lead TSSOP or 8-Lead SO Package
  • Constant 1.25MHz Switching Frequency
  • Wide Operating Voltage Range: 3V to 25V
  • High Efficiency 0.09Ω Switch
  • 1.2V Feedback Reference Voltage
  • Uses Low Profile Surface Mount Components
  • Low Shutdown Current: 15µA
  • Synchronizable to 2MHz
  • Current Mode Loop Control
  • Constant Maximum Switch Current Rating at All Duty Cycles*
  • Available in 8-Lead SO and 16-Lead Thermally Enhanced TSSOP Packages
Additional Details
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The LT1765 is a 1.25MHz monolithic buck switching regulator. A high efficiency 3A, 0.09Ω switch is included on the die together with all the control circuitry required to construct a high frequency, current mode switching regulator. Current mode control provides fast transient response and excellent loop stability.

New design techniques achieve high efficiency at high switching frequencies over a wide operating voltage range. A low dropout internal regulator maintains consistent performance over a wide range of inputs from 24V systems to Li-Ion batteries. An operating supply current of 1mA improves efficiency, especially at lower output currents. Shutdown reduces quiescent current to 15µA. Maximum switch current remains constant at all duty cycles. Synchronization allows an external logic level signal to increase the internal oscillator into the range of 1.6MHz to 2MHz.

Full cycle-by-cycle current control and thermal shutdown are provided. High frequency operation allows the reduction of input and output filtering components and permits the use of chip inductors.

Applications

  • DSL Modems
  • Portable Computers
  • Regulated Wall Adapters
  • Battery-Powered Systems
  • Distributed Power
Part Models 12
1ku List Price Starting From $5.56

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT1765EFE#PBF
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LT1765EFE#TRPBF
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LT1765EFE-1.8#PBF
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LT1765EFE-2.5#PBF
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LT1765EFE-3.3#PBF
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LT1765EFE-3.3#TRPBF
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LT1765EFE-5#PBF
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LT1765ES8#PBF
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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

LT1765EFE#PBF

PRODUCTION

LT1765EFE#TRPBF

PRODUCTION

LT1765EFE-1.8#PBF

PRODUCTION

LT1765EFE-1.8#TRPBF

PRODUCTION

LT1765EFE-2.5#PBF

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LT1765EFE-2.5#TRPBF

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LT1765EFE-3.3#PBF

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LT1765EFE-3.3#TRPBF

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LT1765EFE-5#PBF

PRODUCTION

LT1765EFE-5#TRPBF

PRODUCTION

Oct 12, 2022

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

Jun 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1765ES8#PBF

PRODUCTION

LT1765ES8#TRPBF

PRODUCTION

Filter by Model

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Reset Filters

Part Models

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

LT1765EFE#PBF

PRODUCTION

LT1765EFE#TRPBF

PRODUCTION

LT1765EFE-1.8#PBF

PRODUCTION

LT1765EFE-1.8#TRPBF

PRODUCTION

LT1765EFE-2.5#PBF

PRODUCTION

LT1765EFE-2.5#TRPBF

PRODUCTION

LT1765EFE-3.3#PBF

PRODUCTION

LT1765EFE-3.3#TRPBF

PRODUCTION

LT1765EFE-5#PBF

PRODUCTION

LT1765EFE-5#TRPBF

PRODUCTION

Oct 12, 2022

- 22_0255

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

Jun 11, 2021

- 21_0060

arrow down

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1765ES8#PBF

PRODUCTION

LT1765ES8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC476A

LT1765EFE | Wide Input Range, 1.25MHz Step-Down DC/DC Converter, 3V to 25V Input, Jumper Selectable 3.3V or 5VOUT @ 2A

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DC476A

LT1765EFE | Wide Input Range, 1.25MHz Step-Down DC/DC Converter, 3V to 25V Input, Jumper Selectable 3.3V or 5VOUT @ 2A

LT1765EFE | Wide Input Range, 1.25MHz Step-Down DC/DC Converter, 3V to 25V Input, Jumper Selectable 3.3V or 5VOUT @ 2A

Product Detail

DC476A: Demo Board for the LT1765 - Monolithic 3A, 1.25MHz Step-Down Switching Regulators.


 


reference details image

DC436A

LT1765ES8 | Wide Input Range, 1.25MHz Step-Down DC/DC Converter, 8.5V~25VIN, 5VOUT @ 2A

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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