In today's era of big data, through the storage, mining, and analysis of data, it not only makes life more convenient, but also improves happiness. DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory) refers to Double Data Rate Synchronous Dynamic Random Access Memory, commonly referred to as DDR. Up to now, there are mainly DDRs, DDR2, DDR3, DDR4, DDR5 and other versions. For the power supply of the DDR SDRAM system, in addition to the conventional VCC power supply, three sets of power supplies are required: VDDQ, VTT and VREF. Depending on the topology, some designs do not require the use of active VTT (e.g., when the controller has a small number of DDRs), while in the case of multiple drives, VTT requires a large capacity to source and sink current, and a DDR termination regulator is required. To this end, Toll Micro has launched a DDR terminal regulator TMI62033, which has the application requirements of DDR-DDR4 compatibility, 3A source and sink current capability, and faster transient response speed, which can effectively improve the quality of data transmissionAt the same time, it has built-in PG and a variety of protection functions to ensure that the output system is more stable, and is suitable for industrial control FPGA, display screen (** conversion) and other fields.
3A pull-sink current capability, better load regulation, and improved data transmission quality
Usually, a controller will hang a lot of DDR particles, resulting in a large pull-to-sink current on the bus, so a VTT power supply that can provide a large pull-to-sink current capability is required. The TMI62033 has a 3A load-to-sink current capability, and the load regulation and voltage stability capabilities are better than those of competing products, effectively improving the data transmission quality. The following measured comparisons:
Comparison chart of source and sink current capacity & load regulation.
Under the same peripheral parameters, the voltage change of TMI62033 can be controlled within 25mV under the condition of 3A under load. Under the same conditions, the voltage change of XXX51200 under load 2A is within 35mV.
Faster transient response and more stable output
As a DDR termination regulator, its dynamic characteristics are also crucial during data transmissionCompared with competing products, TMI62033 has a faster dynamic response speed, achieving lower dynamic output ripple and more stable output。The following is a comparison of the measured waveforms:
Measured dynamic ripple.
High compatibility, built-in PG and multiple protection functions
The TMI62033 supports DDR SDRAM applications such as DDR, DDR2, DDR3, LPDDR3, DDR3L, DDR4, and LPDDR4The chip has a built-in PGOOD function, which feeds back the power status to the main controllerAt the same time, a variety of built-in protection functionsSoft-start, under-voltage lockout (UVLO), over-current limit (OCL), thermal shutdown protection, etc., further improve the safety and reliability of the system.
Schematic diagram of a typical application.
Features:
Input Voltage Range: 2375v to 35v
VLDOIN Voltage Range: 11v to 35v
vrefin, vrefout, vo voltage range: 05v to 18v
It has a maximum of 3A sink and source termination regulators.
25mA reference load capacity (refout).
Optimized internal loop compensation for smaller dynamic ripple.
Remote Detection (VOSNS).
Refin allows connection to VDDQ, either directly or via a voltage divider.
Built-in soft-start, PGOOD, under-voltage lockout (UVLO), over-current limit (OCL), and thermal shutdown protection.
DFN3*3-10 package.
In order to improve energy efficiency, the main power supply voltage is constantly reduced, and the memory protocol is constantly updatedToll Microelectronics will continue to break through itself in the existing technology, quickly launch more serialized products that can solve customer pain points, accelerate technology and product innovation iteration, provide reliability assistance for the industry, and increase the "core" power for the improvement of the industry ecology.