The Texas Instruments TPS7H3301-SP is a sink and source double data rate (DDR) termination regulator designed for space applications with built-in VTTREF buffer.

The component is specifically designed to be a compact, low-noise solution for applications with space and weight limitations. The space DDR termination applications include solid state recorders, single board computers, and payload processing. 

During read/write conditions, the fast transient response feature of the component enables stable supply. Any voltage offset between VTT/Vo and VTTREF are minimized by the fast tracking feature of the VTTREF during transients. DDR VTT termination applications is supported by the TPS7H3301-SP using DDR, DDR2, DDR3, DDR4.

The component can be integrated with an enable input and an open-drain power-good output (PGOOD) to enable simple power sequencing. To monitor when all supplies have come into regulation. PGOOD output can be tied to multiple open-drain outputs. During suspend to RAM (S3) power down mode, VTT/Vo can be discharged using enable signal.

The product is radiation hardened, space-graded and is tested for on-orbit Single Event Effects (SEE) event rates in LEO and GEO using Cosmic Ray Effects on Micro-Electronics 96 (CREME96).


  • Command and data handling (C&DH)
  • Optical imaging payload
  • Radar imaging payload

Orderable Part Numbers

Key features

  • 5962R14228:
    • Radiation hardness assurance (RHA) qualified to total ionizing dose (TID) 100 krad(Si)
    • Single event latch-up (SEL), single event gate rupture (SEGR), single event burnout (SEB) immune to LET=70 MeV-cm2/mg(2)
    • Single event transient (SET), single event functional interrupt (SEFI), and single event upset (SEU) characterized to 70 MeV-cm2/mg(2)
  • Supports DDR, DDR2, DDR3, DDR3L, and DDR4 termination applications
  • Input voltage: supports a 2.5-V and 3.3-V rail(3)
  • Separate low-voltage input (VLDOIN) down to
    0.9 V for improved power efficiency(3)
  • 3-A sink and source termination regulator includes droop compensation
  • Enable input and power-good output for power supply sequencing
  • VTT termination regulator
    • Output voltage range: 0.5 to 1.75 V
    • 3-A sink and source current
  • Integrated precision voltage divider network with sense input
  • Remote sensing (VTTSNS)
  • VTTREF buffered reference
    • ±15-mV accuracy
    • ±10-mA sink and source current
  • Undervoltage lockout (UVLO) and overcurrent limit (OCL) functionality integrated

Development Kits

Testing & qualification

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Last updated: 2021-12-21


Radiation-hardness-assured (RHA) 3-A sink/source DDR termination linear regulator



input voltage
0.9 to 3.5 V
output current VTT
< 3 A
operating temperature
-55 to 125 C
RoHS compliance
REACH compliance
export control


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