LTC3877EUK#PBF

LTC3877 is a VID-programmable, constant frequency current mode step-down controller using an advanced and proprietary architecture. This new architecture enhances the signal-to-noise ratio of the current sense signal, allowing the use of very low DC resistance power inductors to maximize efficiency in high current applications. It reduces the current sensing error, so that current sharing is greatly improved in multi-phase low DCR applications. In addition, the controller achieves a minimum on-time of just 40ns, permitting the use of high switching frequency at high step-down ratios. It features dual high speed remote sense differential amplifiers, programmable current sense limits and DCR temperature compensation to limit the maximum output current precisely over temperature. It also features a precise 0.6V reference with guaranteed accuracy of ±0.5%. It is widely used in applications such as FPGAs and processor power, servers and computing etc.

• Input voltage range from 4.5V to 38V
• Output voltage range from 0.6V to 3.5V
• Ultra-low value DCR/RSENSE current sensing
• ±1% maximum total regulation voltage accuracy over temperature
• Dual differential remote sensing amplifiers
• Phase-lockable frequency from 250KHz to 1MHz
• Current mismatch between channel is 5% max, adjustable soft-start current ramping or tracking
• Multi-IC operation upto 12 phases, output overvoltage protection
• Operating temperature range from -40°C to 125°C
• Package style is 44-lead plastic QFN

บันทึก

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