LTC3874-1
RECOMMENDED FOR NEW DESIGNSPolyPhase Step-Down Synchronous Slave Controller with Sub-Milliohm DCR Sensing
- Part Models
- 4
- 1ku List Price
- Starting From $3.77
Overview
- Phase Extender for High Phase Count Voltage Rails
- Operates with Power Blocks, DrMOS or External Gate Drivers and MOSFETs
- Accurate Phase-to-Phase Current Sharing
- Sub-Milliohm DCR Current Sensing
- Phase-Lockable Fixed Frequency 250kHz to 1MHz
- Immediate Response to Master IC's Fault
- Up to 12-Phase Operation
- Wide VIN Range: 4.5 to 38V
- VOUT Range :
- Up to 3.5V (LOWDCR Pin High)
- Up to 5.5V (LOWDCR Pin Low)
- Proprietary Current Mode Control Loop
- Programmable CCM/DCM Operation
- Programmable Phase Shift Control n 24-Lead (4mm × 4mm) QFN Package
The LTC3874-1 is a dual PolyPhase® current mode synchronous step-down slave controller. It enables high current, multiphase applications when paired with a companion master controller by extending the phase count. Compatible master controllers include the LTC3884-1, LTC3774, LTC3875, LTC3877 and LTC3866. The LTC3874-1 employs a unique architecture that enhances the signal-to-noise ratio of the current sense signal, allowing the use of submilliohm DC resistance power inductors to maximize efficiency while reducing switching jitter. Its peak current mode architecture allows for accurate phase-to-phase current sharing even for dynamic loads.
Effectively working with a master controller, the LTC3874-1 supports all the programmable features as well as fault protection.
Applications
- High Current Distributed Power Systems
- Telecom, Datacom and Storage Systems
- Intelligent Energy Efficient Power Regulation
Documentation
Data Sheet 1
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 |
|---|---|---|---|
| LTC3874EUF-1#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3874EUF-1#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3874IUF-1#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3874IUF-1#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2975 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3874
- LTC3874-1
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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