LTC1775
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LTC1775

High Power No RSENSE Current Mode Synchronous Step-Down Switching Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $6.67
Features
  • Highest Efficiency Current Mode Controller
  • No Sense Resistor Required
  • 300mV Maximum Current Sense Voltage
  • Stable High Current Operation
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 4V to 36V
  • Wide VOUT Range: 1.19V to VIN
  • ±1% 1.19V Reference
  • Programmable Fixed Frequency with Injection Lock
  • Very Low Drop Out Operation: 99% Duty Cycle
  • Forced Continuous Mode Control Pin
  • Optional Programmable Soft Start
  • Pin Selectable Output Voltage
  • Foldback Current Limit
  • Output Overvoltage Protection
  • Logic Controlled Micropower Shutdown: I< 30µA
  • Available in 16-Lead Narrow SSOP and SO Packages
Additional Details
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The LTC1775 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using few external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. Largely similar to the LTC1625, the LTC1775 has twice the maximum sense voltage for high current applications. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range.

Burst Mode operation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded.

Fault protection is provided by foldback current limiting and an output overvoltage comparator. An external capacitor attached to the RUN/SS pin provides soft start capability for supply sequencing. A wide supply range allows operation from 4V (4.3V for LTC1775I) to 36V at the input and 1.19V to VIN at the output.

Applications

  • Notebook Computers
  • Automotive Electronics
  • Battery Chargers
  • Distributed Power Systems
Part Models 8
1ku List Price Starting From $6.67

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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

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC1775CGN#PBF

PRODUCTION

LTC1775CGN#TRPBF

PRODUCTION

LTC1775IGN#PBF

PRODUCTION

LTC1775IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

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

LTC1775CGN#PBF

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LTC1775CGN#TRPBF

PRODUCTION

LTC1775IGN#PBF

PRODUCTION

LTC1775IGN#TRPBF

PRODUCTION

Aug 6, 2022

- 22_0173

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

LTC1775CS#PBF

PRODUCTION

LTC1775CS#TRPBF

PRODUCTION

LTC1775IS#PBF

PRODUCTION

LTC1775IS#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

arrow down

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC1775CGN#PBF

PRODUCTION

LTC1775CGN#TRPBF

PRODUCTION

LTC1775IGN#PBF

PRODUCTION

LTC1775IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

arrow down

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

LTC1775CGN#PBF

PRODUCTION

LTC1775CGN#TRPBF

PRODUCTION

LTC1775IGN#PBF

PRODUCTION

LTC1775IGN#TRPBF

PRODUCTION

Aug 6, 2022

- 22_0173

arrow down

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

LTC1775CS#PBF

PRODUCTION

LTC1775CS#TRPBF

PRODUCTION

LTC1775IS#PBF

PRODUCTION

LTC1775IS#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC337A

LTC1775CS | High Power, No RSENSE Current Mode Stepdown Controller, 4.5 ~ 28VIN, 3.3 or 5VOUT @ 10A, VOUT Adjustable 2.5 ~ 12V

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DC337A

LTC1775CS | High Power, No RSENSE Current Mode Stepdown Controller, 4.5 ~ 28VIN, 3.3 or 5VOUT @ 10A, VOUT Adjustable 2.5 ~ 12V

LTC1775CS | High Power, No RSENSE Current Mode Stepdown Controller, 4.5 ~ 28VIN, 3.3 or 5VOUT @ 10A, VOUT Adjustable 2.5 ~ 12V

Product Detail

DC337A: Demo Board for the LTC1775 High Power No RSENSE Current Mode Synchronous Step-Down Switching Regulator.

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.

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