First space linear regulator for DDR memory termination

First space linear regulator for DDR memory termination

New Products |
By Nick Flaherty

The TPS7H3301-SP is the only DDR regulator immune to single-event effects up to 65 megaelectron volts per centimeter squared (MeV-cm2), powering space-satellite payloads including single-board computers, solid-state recorders and other memory applications. 

The regulator integrates two monolithic power field-effect transistors (FETs) for source and sink termination and an internal voltage reference and is up to 50 percent smaller than a switch-mode regulator DDR solution.

The 3 A sink and source tracking termination regulator is specifically designed for low input voltage, low-cost, and low external component count systems where space is a key application parameter. It integrates a high-performance, low-dropout (LDO) linear regulator that is capable of both sinking and sourcing current and employs a fast feedback loop so that ceramic capacitors can be used to support the fast load transient response. To achieve tight regulation with minimum effect of trace resistance, a remote sensing pin can provide a separate trace from the high-current voltage output, and there is also a dedicated pin for VTT power supply to minimize the LDO power dissipation on user application. 

Designers can pair the TPS7H3301-SP with the TPS50601-SP buck converter to create the smallest complete power solution for DDR memory, and they have access to a full suite of support resources, including comprehensive radiation reports, on-demand training and Simulation Program with Integrated Circuit Emphasis (SPICE) models to reduce development time and quickly complete worst-case circuit analysis by downloading a full-capability linear regulator SPICE model.

The TPS7H3301-SP is available now in a 16-pin dual-ceramic flat package that is Qualified Manufacturer List (QML) Class V and 100 krad (silicon) radiation hardness assurance (RHA) qualified (5962R1422801VXC). 

For more information or to download the radiation report, see

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