LTC3810
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LTC3810

100V Current Mode Synchronous Switching Regulator Controller

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Info: : PRODUCTION tooltip
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Part Details
Part Models 4
1ku List Price Starting From $4.19
Features
  • High Voltage Operation: Up to 100V
  • Large 1Ω Gate Drivers
  • No Current Sense Resistor Required
  • Dual N-Channel MOSFET Synchronous Drive
  • Extremely Fast Transient Response
  • ±0.5% 0.8V Voltage Reference
  • Programmable Output Voltage Tracking/Soft-Start
  • Generates 10V Driver Supply from Input Supply
  • Synchronizable to External Clock
  • Selectable Pulse Skip Mode Operation
  • Power Good Output Voltage Monitor
  • Adjustable On-Time/Frequency: tON(MIN) < 100ns
  • Adjustable Cycle-by-Cycle Current Limit
  • Programmable Undervoltage Lockout
  • Output Overvoltage Protection
  • 28-Pin SSOP Package
Additional Details
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The LTC3810 is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The LTC3810 uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor.

A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3810 to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. A shutdown pin allows the LTC3810 to be turned off, reducing the supply current to 240μA.

Integrated bias control generates gate drive power from the input supply during start-up and when an output short-circuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher efficiency.

 


Features Adj UVLO, Sync & Tracking Package
LTC3810 Vin 6.2V to 100V, 10V Driver Voltage Yes SSOP-28
LTC3810-5 Vin 4.35V to 60V, 5.5V Driver Voltage Yes QFN-32
LTC3812-5 Vin 4.35 to 60V, 5.5V Driver Voltage No TSSOP-16E

 


Applications

  • 48V Telecom and Base Station Power Supplies
  • Networking Equipment, Servers
  • Automotive and Industrial Control Systems
Part Models 4
1ku List Price Starting From $4.19

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3810EG#PBF
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LTC3810EG#TRPBF
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LTC3810IG#PBF
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LTC3810IG#TRPBF
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Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3810EG#PBF

PRODUCTION

LTC3810EG#TRPBF

PRODUCTION

LTC3810IG#PBF

PRODUCTION

LTC3810IG#TRPBF

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

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Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3810EG#PBF

PRODUCTION

LTC3810EG#TRPBF

PRODUCTION

LTC3810IG#PBF

PRODUCTION

LTC3810IG#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC952A

LTC3810EG Demo Board | 13V ≤ VIN ≤ 80V; VOUT = 12V @ 6A

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DC952A

LTC3810EG Demo Board | 13V ≤ VIN ≤ 80V; VOUT = 12V @ 6A

LTC3810EG Demo Board | 13V ≤ VIN ≤ 80V; VOUT = 12V @ 6A

Product Detail

Demonstration circuit 952 is a current mode synchronous switching regulator featuring the LTC3810. The circuit is configured as a synchronous step-down regulator operating at 230kHz switching frequency. Output voltage is 12V at 6A maximum load. The input voltage range is 13V to 80V.

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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