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, PWM controllers, and gate drivers as shown in Table 3-1.

The TPS50601A-SP is a 6 A highly efficient buck converter with over a decade in flight heritage that can be used to power the core and auxiliary rails. The 7 V rated input provides plenty of margin to operate from a standard nominal 5 V power rail. The footprint compatible TPS7H4002-SP can also be used as it is architecturally very similar to the TPS50601A-SP with a lower current limit for smaller inductor sizing which provides additional savings in board space. For a similar 6 A rad-tolerant design, the TPS7H4010-SEP provides an extremely compact design in a 4×6 mm WQFN package and is the widest V_in space grade switching regulator at 32 V_in.

The RHA buck converters are typically limited to a 7 V_in recommended operating condition. If a designer needs to accommodate a higher input voltage, the TPS7H5001-SP 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 5V 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 its wide input range (2.2 - 20 V_in) all in a small plastic 6.5 × 3.5 mm SOT package. The TPS7H1111-SP and TPS7H1111-SEP can be used as alternatives for applications needing high PSRR and noise performance.