Data centers are crucial for business continuity and reliable communications. Texas Instruments (TI) provides performance power management solutions, enabling high availability and efficiency when powering processors for data centers and rack servers. Advanced processors such as Intel® Xeon® Sapphire Rapids scalable processors, need point-of-load solutions for low-power CPU rails, 3.3-V and 5-V rail requirements from a nominal 12-V input bus. DDR5 memory point-of-load power is now provided by the Dual In-line Memory Module (DIMM) and no longer required on the motherboard. For specific information about Intel processors and their power requirements, log on to the Intel Resource and Design Center. Contact TI for information about multiphase controllers and power stages designed specifically for addressing the VR14 VCCIN and Serial Voltage Identification (SVID) specifications. This document highlights DC/DC converters and describes their features addressing performance processor power requirements.
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Table 1-1 highlights the latest point-of-load DC/DC converters with integrated MOSFETs that are applicable to powering Sapphire Rapids applications; however, they are designed to accommodate the requirements for a wide range of markets. These devices are designed to achieve fast transient response, high efficiency, good thermal performance, and high output voltage accuracy. Notice that different control architectures are suggested in Table 1-1.
Fixed-frequency control architectures provide a predictable switching frequency and can be synchronized to an external clock. Current mode or voltage mode control is desirable in noise-sensitive applications that use data converters and high-speed analog circuits. On the other hand, devices implementing constant on-time control deliver a faster transient response than voltage or current mode control to quickly changing load profiles, since there is no internal clock to control the switching frequency. Several devices feature PMBus® or I2C with adaptive voltage scaling and margining. Devices integrating PMBus or I2C with telemetry report voltage, current, and temperature information to a host processor.
DC/DC converters with integrated MOSFETs supporting Serial Voltage Identification (SVID) are now available, and offer a solution that is smaller and easier to design than a multi-phase controller-based solution when the output current is lower. The TPS53820 provides up to two outputs to power the low current SVID rails such as VCCANA (5.5 A) and P1V8 (4 A) in VR13.HC applications, and the TPS544C26 is Intel VR13 SVID compliant for Eagle Stream (EGS) and Birch Stream (BHS) applications. The TPS544C27 and TPS544E27 support VR14 Oak Stream (OKS) applications which include telemetry and security features, and are backwards-compatible to earlier Birch Stream and Eagle Stream applications.
IOUT Rating | Constant On-Time Control | Fixed Frequency Control | SVID Converter | PMBus / I2C with Telemetry |
---|---|---|---|---|
DC/DC Converters with Integrated MOSFETS | ||||
≤ 2 A | TPS562231 | TPS62902 | TPS53820 | N/A |
2 A – 3 A | TPS563231 | TPS53820 | N/A | |
3 A – 6 A | TPS54J061 | TPS543620 | TPS53820 | TPS546C25 |
7 A – 11 A | TPS548A28 | TPS543A22 | TPS544C27 | TPS546C25 |
12 A – 15 A | TPS548B23 | TPS543B22 | TPS544C27 | |
16 A - 20 A | TPS548B23 | TPS543B22 | TPS544C27 | TPS546C25 |
21 A – 25 A | TPS548C26 | TPS543B25 | TPS544C27 | TPS546C25 |
26 A – 35 A | TPS548C26 | TPS543C20A | TPS544E27 | |
>35 A | TPS548D26 | TPS543C20A | TPS544E27 | |
Serial Voltage Identification (SVID) Controllers | ||||
Dual Channel, 8-Phase (EGS) | TPS53689 | |||
Dual Channel, 12-Phase (EGS) | TPS536C9 | |||
Dual Channel, 8-Phase TLVR (BHS) | ||||
Dual Channel, 12-Phase TLVR (BHS) | ||||
OKS: Contact TI for multi-phase controllers |
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Smart Power Stage | ||||
90-A NexFET™ smart power stage in 5x6mm package | CSD95410 | |||
50-A NexFET™ smart power stage in 4x5mm package | CSD95420 | |||
BHS, OKS: Contact TI for Smart Power Stages in Development | ||||
Low Drop Out Regulator | ||||
1.5A | TPS748A | Linear Regulator with Adjustable Soft-Start, PG, Enable, and 0.85% Reference Accuracy |
Products in italics have a second-source from another supplier.