LTC3856EUH#PBF

LTC3856EUH#PBF is a 2-phase synchronous step-down DC/DC controller with diff amp. It is a single output, dual channel PolyPhase synchronous step-down DC/DC controller that drives all N-channel power MOSFET stages. This device includes a high speed differential amplifier for remote output voltage sense. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase and up to 12-phase operation can be achieved. The LTC3856 monitors the output current by sensing the voltage drop across the output inductor (DCR) or by using a sense resistor. DCR temperature compensation maintains an accurate current sense threshold over a broad temperature range. A constant-frequency, current mode architecture allows a phase-lockable frequency of up to 770KHz. Application includes telecom and datacom systems, industrial and medical instruments, DC power distribution systems, computer systems.

• PolyPhase® Controller reduces i/p and o/p capacitance and power supply induced noise
• Input voltage range from 4.5 to 38V (TA = 25°C)
• Output voltage range from 0.6 to 5.0V (TA = 25°C, VIN = 15V)
• ±0.75%, 0.6V reference voltage accuracy, high efficiency up to 95%
• Programmable Burst Mode® operation or stage Shedding™ for highest light load efficiency
• Active voltage positioning (AVP), RSENSE or DCR current sensing
• Programmable DCR temperature compensation
• Nominal frequency range from 450 to 550KHz (VFREQ = 1.2V, TA = 25°C)
• Adjustable soft-start or VOUT tracking, stackable for up to 12-phase operation
• 32 lead plastic QFN package, operating junction temperature range from -40°C to 125°C

注释

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