Datasheet Analog Devices LTC3874 — Datenblatt

LTC3874
PolyPhase Step-Down
Synchronous Slave Controller with
Sub-Milliohm DCR Sensing
FEATURES DESCRIPTION n n n n n n n 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,
LTC3875, 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. Phase Extender for High Phase Count Voltage Rails
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: 4.5V to 38V
VOUT Range: Up to 3.5V (LOWDCR Pin = INTVCC) Up to 5.5V (LOWDCR Pin = OV)
n Proprietary Current Mode Control Loop
n Programmable CCM/DCM Operatio Programmable Phase Shift Control …