Radiation-hardened, 2.2-V to 20-V, 1-A low-noise adjustable output LDO in Space Enhanced Plastic



Product details


Output options Adjustable Output Iout (Max) (A) 1 Vin (Max) (V) 20 Vin (Min) (V) 2.2 Vout (Max) (V) 20 Vout (Min) (V) 1.21 Noise (uVrms) 45 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 50.5 Load capacitance (Min) (µF) 10 Rating Space Regulated outputs (#) 1 Features Enable, Radiation Hardened Accuracy (%) 3 PSRR @ 100 KHz (dB) 63 Dropout voltage (Vdo) (Typ) (mV) 240 Operating temperature range (C) -55 to 125 Radiation, SEL (MeV.cm2/mg) 43 Radiation, TID (Typ) (krad) 30 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-223 (DCQ) 6 46 mm² 6.5 x 7.06 open-in-new Find other Linear regulators (LDO)


  • VID V62/18616
  • Radiation hardened
    • SEL, SEB, and SEGR immune up to LET = 43 MeV-cm2/mg
    • SET and SEFI characterized up to LET = 43 MeV-cm2/mg
    • TID assured for every wafer lot up to 20 krad(Si)
    • TID characterized up to 50 krad(Si)
  • Space enhanced plastic
    • Au bondwire and NiPdAu lead finish
    • Enhanced mold compound for low outgassing
    • One fabrication, assembly, and test site
    • Extended product life cycle
    • Extended product change notification
    • Product traceability
  • Optimized for fast transient response
  • Output current: 1 A
  • Dropout voltage: 300 mV
  • Low noise: 45 µVRMS (10 Hz to 100 kHz)
  • 1-mA quiescent current
  • No protection diodes needed
  • Controlled quiescent current in dropout
  • Adjustable output voltage: 1.21 V to 20 V
  • Less than 1-µA quiescent current in shutdown
  • Stable with 10-µF output capacitor
  • Stable with ceramic capacitors
  • Reverse-battery protection
  • No reverse current
  • Thermal limiting

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The TPS73801-SEP is a low-dropout (LDO) regulator optimized for fast transient response. The device can supply 1 A of output current with a dropout voltage of 300 mV. Operating quiescent current is 1 mA and drops to less than 1 µA in shutdown. Compared to many other regulators, quiescent current is well controlled and does not rise in dropout. In addition to fast transient response, a very low output noise makes the TPS73801-SEP regulator ideal for sensitive RF supply applications.

Output voltage range is from 1.21 to 20 V and is stable with use of output capacitors as low as 10 µF. Small ceramic capacitors can be used without the necessary addition of ESR. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse-current protection. The TPS73801-SEP regulator is available with an adjustable 1.21-V reference voltage and in the 6-pin TO-223 (DCQ) package.

open-in-new Find other Linear regulators (LDO)
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TPS7A4501-SP ACTIVE Radiation-hardness-assured (RHA), 1.5-V to 20-V, 1.5-A low-dropout (LDO) regulator Radiation Hardened Assured version with higher max current output (1.5 A) and lower noise rating (35 uVrms).
TPS7H1101A-SP ACTIVE Radiation-hardness-assured (RHA), 1.5-V to 7-V input, 3-A low-noise low-dropout (LDO) regulator Radiation Hardened Assured version with added features like soft start, power good, adjustable current limit, and current sense for complex power requirements.

Technical documentation

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Type Title Date
* Data sheet TPS73801-SEP 1-A Low-Noise Fast-Transient-Response Low-Dropout Regulator in Space Enhanced Plastic datasheet (Rev. A) May 31, 2021
* Radiation & reliability report TPS73801-SEP Total Ionizing Dose (TID) Radiation Report (Rev. B) Apr. 26, 2021
* VID TPS73801-SEP VID V6218616 Aug. 06, 2020
* Radiation & reliability report TPS73801-SEP Production Flow and Reliability Report Jan. 29, 2019
* Radiation & reliability report TPS73801-SEP Single-Event Effects (SEE) Test Report Jan. 08, 2019
Selection guide TI Space Products (Rev. H) Jan. 27, 2021
Technical article Space Enhanced Plastic gives designers a new solution for emerging low-Earth orbit commercial applications Oct. 03, 2019
Application note Reduce the risk in NewSpace with Space Enhanced Plastic products Jul. 29, 2019
E-book Preview: Radiation Handbook for Electronics (Rev. A) Jun. 07, 2019
E-book Radiation Handbook for Electronics (Rev. A) May 21, 2019
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 20, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The Texas Instruments DEM-SOT223LDO demonstration module (DEM) helps designers evaluate the operation and performance of Texas Instruments low-dropout regulators (LDOs).  This module is compatible with most positive output LDOs offered in the SOT223 (DCQ) package.

Design tools & simulation

SLVMCX3.ZIP (3 KB) - PSpice Model
SLVMCX6.TSC (1203 KB) - TINA-TI Reference Design
SLVMCX7.ZIP (17 KB) - TINA-TI Spice Model

CAD/CAE symbols

Package Pins Download
SOT-223 (DCQ) 6 View options

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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