LTC3874 - PolyPhase Step-Down Synchronous Slave Controller with Sub-Milliohm DCR Sensing
The LTC®3874 is a dual PolyPhase® current mode synchronous step-down slave controller. It enables high current, multi-phase applications when paired with a companion master controller by extending the phase count. Compatible master controllers include the LTC3884, LTC3866, LTC3877 and LTC3774. The LTC3874 employs a unique architecture that enhances the signal-to-noise ratio of the current sense signal, allowing the use of sub-milliohm 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 supports all the programmable features as well as fault protection.
Features
Typical Application  | Applications
Packaging |
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC3874EUFD#PBF | 4x5 QFN-28 | E | $3.53 | $2.47 |
| LTC3874EUFD#TRPBF | 4x5 QFN-28 | E | $2.53 | |
| LTC3874IUFD#PBF | 4x5 QFN-28 | I | $3.79 | $2.65 |
| LTC3874IUFD#TRPBF | 4x5 QFN-28 | I | $2.71 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC2084A | LTC3884EUK/LTC3874EUFD Demo Board | PolyPhase Digital PSM Buck with Sub-mΩ DCR Sensing Plus Two Slave Controllers, 10V ≤ VIN ≤ 14V, Vout = 0.5V to 1.5V @ 240A | Contact Factory |
| DC2142A | LTC3875EUJ/LTC3874IUFD Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT: 1V @ 120A | $225.00 |
| DC2229A-B | LTC3877/LTC3874 Demo Board | 4-Phase Buck Controller with VID Inputs, Sub-mΩ DCR sensing, 6V ≤ VIN ≤ 14V, Vout = 0.6V to 1.23V at 120A | Contact Factory |
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