3 Space Rated Power Devices

TI's portfolio of leading power density ICs is capable of providing a full power management design through a selection of buck converters, LDOs, DDR termination regulators, PWM controllers, and gate drivers as shown in Table 3-1.

The TPS7H4001-SP and TPS7H4003-SEP are high current (18 A) buck converters with integrated FETs and the key feature of being able to parallel up to 4 devices 90 degrees out of phase without the need for external clocking meant to meet the increasing need for higher current on the core rail. The 0.6 V reference allows them to meet the low voltage requirement typically seen for this rail. The TPS50601A-SP is a smaller 6 A highly efficient buck converter with over a decade in flight heritage used to power many of the auxiliary rails. The footprint compatible TPS7H4002-SP can also be used for powering auxiliary rails as it is architecturally very similar to the TPS50601A-SP with a lower current limit for smaller inductor sizing. For a similar 6 A rad-tolerant design, the TPS7H4010-SEP provides an extremely compact design in a 4x6 mm WQFN package and is the widest V_in space grade switching regulator at 32 V_in.

The RHA buck converters are limited to a 7 V_in recommended operating condition. If a designer needs to accommodate a higher input voltage, the TPS7H5001-SP or TPS7H5005-SEP PWM controller can be used to build a discrete buck converter. This highly flexible controller paired with a gate driver is capable of working with both Si and GaN FETs to be used as a first stage conversion or in a high efficient GaN supply that powers the core rail directly. The 0.6 V reference with +0.7%/-1.0% reference accuracy provides a very tight tolerance to meet the core voltage. To pair with the controller, the TPS7H6003-SP is a half-bridge gate driver to drive eGaN FETs. This driver has integrated LDOs with 5 V output on the low-side and high-side to properly control the gate drive voltage and added input interlock protection to protect against shoot-through events for a highly reliable design.

For noise sensitive rails, TI can provide a number of low-dropout regulators. The TPS7H1101A-SP offers the most integrated design with enable, configurable soft-start, and power good for power sequencing as well as added protective features like current foldback protection. For a rad-tolerant alternative, the TPS73801-SEP provides an extremely versatile LDO to be used across the wide input range (2.2 - 20 V_in) all in a small plastic 6.5 x 3.5 mm SOT package. The TPS7H1111-SP and TPS7H1111-SEP can be used as alternatives for applications needing high PSRR and noise performance.

Lastly, for powering DDR memory, the TPS7H3301-SP or TPS7H3302-SEP is a linear design with the capability to sink and source current and able to power DDR1, DDR2, DDR3, DDR3L, and DDR4. The links in Table 3-1 direct you to the product page of each device for more product specific information.

For more detailed information in meeting DC and AC regulation requirements, see the following white paper: Powering a New Era of High-Performance Space-Grade Xilinx FPGAs.