LTC3774

RECOMMENDED FOR NEW DESIGNS

Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $3.54
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Part Details

  • Sub-Milliohm DCR Current Sensing
  • Operates with Power Blocks, DRMOS or External Gate Drivers and MOSFETs
  • Supports Phase Shedding and N+1 Phase Redundancy
  • Programmable DCR Temperature Compensation
  • ±0.75% Maximum Total DC Output Error Over Temperature
  • Dual Differential Remote Output Voltage Sense Amplifiers
  • Phase-Lockable Fixed Frequency Range: 200kHz to 1.2MHz
  • VIN Range: 4.5V to 38V
  • VOUT Range: 0.6V to 3.5V
  • Supports Smooth Start-Up into Pre-Biased Outputs
  • Programmable Soft-Start or VOUT Tracking
  • Hiccup Mode/Soft Recovery from Output Overcurrent
  • 36-Lead (5mm × 6mm) QFN Package
LTC3774
Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing
High Efficiency Dual Phase 1.5V/60A Step-Down Converter Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Application Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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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
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3774

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
DC2111A-A

LTC3774EUHE Demo Board | Synchronous Buck Controller, 4-Phase (LTC3774 ×2), 10V ≤ VIN ≤ 14V, VOUT = 1.2V @ 90A

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Product Details

Demonstration circuit DC2111A-A features the LTC3774 in a 4-phase, high output current step-down converter with sub-mΩ DCR sensing. This high performance converter provides 1.2V @ 90A with N+1 MOSFET failure protection and operates at a switching frequency of 400kHz over an input voltage range of 10V to 14V. The 5mm × 5mm DrMOS and 0.33μH/0.325mΩ inductor provide high efficiency while supplying 30A per phase.

eval board
schematic 2
DC2111A-B

LTC3774EUHE Demo Board | Synchronous Buck Controller, 4-Phase (LTC3774 ×2), 10V ≤ VIN ≤ 14V, VOUT = 1.2V @ 120A

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Product Details

Demonstration circuit DC2111A-B features the LTC3774 in a 4-phase, high output current step-down converter with sub-mΩ DCR sensing. This high performance, high efficiency converter provides 1.2V @ 120A and operates at a switching frequency of 400kHz over an input voltage range of 10V to 14V. The 5mm × 5mm DrMOS and 0.33μH/0.325mΩ inductor provide high efficiency while supplying 30A per phase.

eval board
schematic 3
DC2002A

LTC3774EUHE Demo Board | Dual Buck Controller, 7V ≤ VIN ≤ 14, VOUT1 = 1.2V @ 30A, VOUT2 = 1.5V @ 30A

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Product Details

Demonstration circuit DC2002A is a dual output synchronous buck converter featuring the LTC3774EUHE. The demo board supplies two rails of 1.5V / 30A and 1.2V / 30A. The power stage for each rail consists of a 0.33μH 0.32mΩ DCR inductor with a 11mm × 11mm footprint and a 6mm × 6mm DrMOS driven by the PWM outputs of the LTC3774EUHE at a switching frequency of 400kHz.
DC2111A-A
LTC3774EUHE Demo Board | Synchronous Buck Controller, 4-Phase (LTC3774 ×2), 10V ≤ VIN ≤ 14V, VOUT = 1.2V @ 90A
DC2111A - Schematic
DC2111A-B
LTC3774EUHE Demo Board | Synchronous Buck Controller, 4-Phase (LTC3774 ×2), 10V ≤ VIN ≤ 14V, VOUT = 1.2V @ 120A
DC2111A - Schematic
DC2002A
LTC3774EUHE Demo Board | Dual Buck Controller, 7V ≤ VIN ≤ 14, VOUT1 = 1.2V @ 30A, VOUT2 = 1.5V @ 30A
DC2002A - Schematic

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DC2111A - Demo Board
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LTC3774
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