LTC3565
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LTC3565

1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

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LTspice LTC3565 - Step-Down (Buck) Regulators Download 1.99 KB LTspice LTC3565 Demo Circuit - 1.25A, 4MHz, Synchronous Step-Down Converter (Li-Ion to 1.8V @ 1.25A) Download 3.00KB
Part Models 8
1ku List Price Starting From $2.43
Features
  • High Efficiency: Up to 95%
  • VIN Range: 2.5V to 5.5V
  • High Frequency Operation: Up to 4MHz
  • Selectable Low Ripple (Typical 25mVp-p) Burst Mode® Operation: IQ = 40μA
  • Stable with Ceramic Capacitors
  • Uses Tiny Capacitors and Inductor
  • Low RDS(ON) Internal Switches: 0.15Ω
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Short-Circuit Protected
  • Low Dropout Operation: 100% Duty Cycle
  • Low Shutdown Current: IQ ≤ 1μA
  • Output Voltages from 0.6V to 5V
  • Synchronizable to External Clock
  • Supports Pre-Biased Outputs
  • Small 10-Lead (3mm × 3mm) DFN or MSOP Package
Additional Details
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The LTC3565 is a constant frequency, synchronous step-down DC/DC converter. Intended for medium power applications, it operates from a 2.5V to 5.5V input voltage range and has a user-configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 1mm or less in height. The output voltage is adjustable from 0.6V to 5.5V. Internal synchronous power switches provide high efficiency. The LTC3565’s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.

The LTC3565 can be configured for automatic power saving Burst Mode operation (IQ = 40μA) to reduce gate charge losses when the load current drops below the level required for continuous operation. For reduced noise and RF interference, the SYNC/MODE pin can be configured to skip pulses or provide forced continuous operation.

To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws <1μA.

Applications

  • Notebook Computers
  • Digital Cameras
  • Cellular Phones
  • Handheld Instruments
  • Board Mounted Power Supplies
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file View Data Sheet
Documentation View All Documentation
LTspice LTC3565 - Step-Down (Buck) Regulators Download 1.99 KB LTspice LTC3565 Demo Circuit - 1.25A, 4MHz, Synchronous Step-Down Converter (Li-Ion to 1.8V @ 1.25A) Download 3.00KB
Part Models 8
1ku List Price Starting From $2.43
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LTC3565

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UPDATED 10/23/2013
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LTC3565: 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter Data Sheet

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UPDATED 12/25/2013
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LTC3565: 1.25A、4MHz、同期整流式降圧DC/DCコンバータ データシート

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UPDATED 09/24/2009
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DC1159A - Demo Manual redirect icon

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UPDATED 10/01/2007
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Compact and Versatile Monolithic Synchronous Buck Regulators Deliver 1.25A in Tiny TSOT23, DFN and MS10 Packages redirect icon

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2017-09-18

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LTspice®: Overview

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LTspice®: Schematic Editor

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3565EDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LTC3565EMSE#PBF 10-Lead MSOP w/ EP external-link
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LTC3565EMSE#TRPBF 10-Lead MSOP w/ EP external-link
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LTC3565IDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LTC3565IMSE#PBF 10-Lead MSOP w/ EP external-link
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LTC3565IMSE#TRPBF 10-Lead MSOP w/ EP external-link
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Feb 4, 2020

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

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Evaluation Kits 1

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DC1159A

LTC3565EDD Demo Board | 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

Evaluation Kits1

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DC1159A

LTC3565EDD Demo Board | 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

Tools & Simulations 2

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.

spice tool Lt Spice

LTC3565 - Step-Down (Buck) Regulators Download

1.99 K

spice tool Lt Spice

LTC3565 Demo Circuit - 1.25A, 4MHz, Synchronous Step-Down Converter (Li-Ion to 1.8V @ 1.25A) Download

3.00K

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