uP1566中文资料Single Buck with 1.5A VTT LDO数据手册uPI(UBIQ)规格书

描述 Description

The uP1566 is a high performance synchronous buckcontroller with 1.5A source/sink LDO for memory systempower. It also provides a buffered low noise referenceVTTREF. The uP1566 has wide operation range from 4.5Vto 26V for input voltage and 0.75V to 3.3V for memoryoutput voltage.

The synchronous buck of the uP1566 adopts uPIproprietary robust constant on-time (RCOTTM) PWMscheme that features easy-to-use, low external componentcount, fast transient response and quasi-constantfrequency operation over the operation range.

The 1.5A source/sink LDO for VTT has fast transientresponse, requiring only two 10uF of ceramic outputcapacitors. In addition, the LDO supply input is availableexternally to significantly reduce the total power losses.The uP1566 supports all the sleep state controls, in S3state (suspend to RAM) VTT is disable and in S4/S5(suspend to disk) VDDQ, VTT and VTTREF are soft off.The uP1566 has complete functions including undervoltage protection, over current protection, over voltageprotection, power-up sequencing, power OK output, andthermal shutdown. The uP1566 is available in WQFN3x3-20L package.

特性 Features

·Synchronous Buck Controller (VDDQ)
·Wide Input Voltage Range from 4.5V to 26V.
·Fast Load Transient Response.
·RCOTTM Control Topology.
·Soft-Off in S4/S5 States.
·Lossless RDS(ON) Current Sensing for Inductor.

·Current Limit
·Fixed 1.5V (DDR3), 1.8V (DDR2) Output or.

·Adjustable from 0.75V to 3.3V
·POK, OVP, UVP and Thermal Shutdown.
·LDO (VTT).
·1.5A Source/Sink Capability.
·Requires Only Two 10uF Ceramic Output.

·Capacitors
·Disable in S3 and Soft-Off in S4/S5.
·Thermal Shutdown.
·±20mV Accuracy.
·Reference Voltage (VTTREF).
·±20mV Accuracy.
·Low Noise + 10mA Output.

应用 Application

·Desktop PCs, Notebooks, and Workstations.
·Microprocessor and Chipset Supplies.
·DDR3/DDR3L/DDR4 Memory Power Supplies.
·SSTL-2 SSTL-18 and HSTL Bus Termination.