LTC3875

RECOMMENDED FOR NEW DESIGNS

Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation

Data Sheet (Rev. D) Product Selection Table
Part Models
12
1ku List Price
Starting From $4.15
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Part Details

  • Low Value DCR Current Sensing
  • Programmable DCR Temperature Compensation
  • ±0.5% 0.6V Output Voltage Accuracy
  • Dual True Remote Sensing Differential Amplifiers
  • Phase-Lockable Fixed Frequency 250kHz to 720kHz
  • Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 4.5V to 38V Operation
  • Output Voltage Range with Low DCR: 0.6V to 3.5V, without Low DCR: 0.6V to 5V
  • Adjustable Soft-Start Current Ramping or Tracking
  • Foldback Output Current Limiting
  • Clock Input and Output for Up to 12-Phase Operation
  • Short-Circuit Soft Recovery
  • Output Overvoltage Protection
  • Power Good Output Voltage Monitor
  • 40-Lead QFN Packages
  • AEC-Q100 Qualified for Automotive Applications
LTC3875
Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation
LTC3875 Application Circuit LTC3875 Pin Configuration LTC3875 Pin Configuration LTC3875 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 4

Application Note 1

Technical Articles 2

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2977
RECOMMENDED FOR NEW DESIGNS 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
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Tools & Simulations

LTspice 5

Models for the following parts are available in LTspice:

  • LTC3875

LTpowerCAD 2

LTspice

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.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
DC2055A

LTC3875EUJ Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT: 1V @ 120A

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Product Details

Demonstration circuit 2055A is a high efficiency, high density, 4-phase synchronous buck converter with a 4.5V to 14V input range. It can supply 120A maximum load current at a 1.0V output. This demo board has two LTC3875EUJ controllers. The LTC3875 is a feature-rich dual-phase synchronous buck controller with very low DCR current sensing capability, on-chip drivers and remote output voltage sensing. This board is set up with 0.32mΩ DCR inductor. The temperature compensation function can guarantee accurate current limit over a wide temperature range with DCR sensing.

eval board
schematic 2
DC2225A

LTC3875EUJ Demo Board | 4-Phase Synchronous Buck Solution, LTC3875 (×2), 4.5V ≤ VIN ≤ 14V; VOUT = 1V @ 160A

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Product Details

Demonstration circuit 2225A is a high efficiency, high density, 4-phase synchronous buck converter with a 4.5V to 14V input voltage range. It can supply up to 160A of load current with a 1.0V output. This demo board has two each LTC3875EUJ feature-rich dual phase current mode synchronous buck controllers with very low DCR current sensing capability, on-chip drivers and remote output voltage sensing. This board is set up with 0.32mΩ DCR output inductors. The temperature compensation function offers an option for accurate current limit over a wide temperature range with DCR sensing. To shut down the converter, set the RUN pin voltage below 1V (SW1: OFF). Use JP1 jumper to select Burst Mode® operation, pulse skipping mode or forced continuous mode operation at light load.

eval board
schematic 3
DC2000A

LTC3875EUJ Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1 = 1.0V @ 30A, VOUT2 = 1.5V @ 30A

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Product Details

Demonstration circuit 2000A is a high efficiency, high density, synchronous buck converter with a 4.5V to 14V input range. It can supply 30A maximum load current at a 1.0V output and at a 1.5V output separately. The demo board includes a LTC3875EUJ controller. The LTC3875 is a feature-rich dual phase synchronous buck controller with very low DCR current sensing capability, on-chip drivers and remote output voltage sensing. This board is set up with a 0.32mΩ DCR inductor. The temperature compensation function can guarantee accurate current limit over a wide temperature range with DCR sensing.


 


eval board
schematic 4
DC2142A

LTC3875EUJ/LTC3874IUFD Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT: 1V @ 120A

Buy Now View Details

Product Details

Demonstration circuit 2142A is a high efficiency, high density, 4-phase synchronous buck converter with a 4.5V to 14V input range. It can supply 120A maximum load current at a 1.0V output. This demo board incorporates the LTC3875EUJ and LTC3874IUFD master/slave controllers.
DC2055A
LTC3875EUJ Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT: 1V @ 120A
DC2055A - Schematic
DC2225A
LTC3875EUJ Demo Board | 4-Phase Synchronous Buck Solution, LTC3875 (×2), 4.5V ≤ VIN ≤ 14V; VOUT = 1V @ 160A
DC2225A - Schematic
DC2000A
LTC3875EUJ Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1 = 1.0V @ 30A, VOUT2 = 1.5V @ 30A
DC2000A - Schematic
DC2142A
LTC3875EUJ/LTC3874IUFD Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT: 1V @ 120A
DC2142A

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