LTC1435A
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LTC1435A

High Efficiency Low Noise Synchronous Step-Down Switching Regulator

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LTspice LTC1435A - Step-Down (Buck) Regulators Download 4.19 KB LTspice LTC1435A - Step-Down (Buck) Regulators, LT1621 - Specialty Amplifiers Download 4.95 KB
Part Models 8
1ku List Price Starting From $5.96
Features
  • Dual N-Channel MOSFET Synchronous Drive
  • Programmable Fixed Frequency
  • Wide VIN Range: 3.5V to 36V Operation
  • Low Minimum On-Time (≤300ns) for High Frequency, Low Duty Cycle Applications
  • Very Low Dropout Operation: 99% Duty Cycle
  • Low Standby Current
  • Secondary Feedback Control
  • Programmable Soft Start
  • Remote Output Voltage Sense
  • Logic Controlled Micropower Shutdown: IQ <25µA
  • Foldback Current Limiting (Optional)
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Output Voltages from 1.19V to 9V
  • Available in 16-Lead Narrow SO and SSOP Packages
Additional Details
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The LTC1435A is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using a fixed frequency architecture. A wide duty cycle range of 5% to 99% allows high VIN to low VOUT DC/DC conversion, as well as low dropout operation that extends operating time in battery-operated systems. Burst Mode™ operation provides high efficiency at low load currents.

The operating frequency is set by an external capacitor allowing maximum flexibility in optimizing efficiency. A secondary winding feedback control pin, SFB, guarantees regulation regardless of load on the main output by forcing continuous operation. Burst Mode operation is inhibited when the SFB pin is pulled low, which reduces noise and RF interference.

Soft start is provided by an external capacitor that can be used to properly sequence supplies. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 30V (36V maximum).

Applications

  • Notebook and Palmtop Computers, PDAs
  • Cellular Telephones and Wireless Modems
  • Portable Instruments
  • Battery-Operated Devices
  • DC Power Distribution Systems
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file View Data Sheet
Documentation View All Documentation
LTspice LTC1435A - Step-Down (Buck) Regulators Download 4.19 KB LTspice LTC1435A - Step-Down (Buck) Regulators, LT1621 - Specialty Amplifiers Download 4.95 KB
Part Models 8
1ku List Price Starting From $5.96
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LTC1435A

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Data Sheet

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UPDATED 08/24/2007
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LTC1435A: High Efficiency Low Noise Synchronous Step-Down Switching Regulator Data Sheet

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UPDATED 02/21/2008
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LTC1435A: 高効率低ノイズ同期式降圧スイッチング・レギュレータ データシート

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UPDATED 03/22/2018
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Application Note

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UPDATED 08/20/2007
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UPDATED 02/01/1999
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Documentation

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
LTC1435ACG#PBF 16-Lead SSOP external-link
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LTC1435ACG#TRPBF 16-Lead SSOP external-link
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LTC1435ACS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LTC1435ACS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1435AIG#PBF 16-Lead SSOP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1435AIG#TRPBF 16-Lead SSOP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1435AIS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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LTC1435AIS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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Aug 6, 2022

- 22_0173

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LTC1435ACS#PBF

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LTC1435ACS#TRPBF

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LTC1435AIS#PBF

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LTC1435AIS#TRPBF

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Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LTC1435ACS#PBF

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LTC1435ACS#TRPBF

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LTC1435AIS#PBF

PRODUCTION

LTC1435AIS#TRPBF

PRODUCTION

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Software & Part Ecosystem

Evaluation Kits 1

DC221A

LTC1435ACG | High Efficiency Triple-Output Supply, 6V to 20VIN, 3.3V, 5V, and –5VOUT @ 2A, 0.5A, 0.25Amp Respectively

Evaluation Kits1

DC221A

LTC1435ACG | High Efficiency Triple-Output Supply, 6V to 20VIN, 3.3V, 5V, and –5VOUT @ 2A, 0.5A, 0.25Amp Respectively

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.

spice tool Lt Spice

LTC1435A - Step-Down (Buck) Regulators Download

4.19 K

spice tool Lt Spice

LTC1435A - Step-Down (Buck) Regulators, LT1621 - Specialty Amplifiers Download

4.95 K

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