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Product details

Parameters

Output options Adjustable Output Iout (Max) (A) 1 Vin (Max) (V) 20 Vin (Min) (V) 2.2 Vout (Max) (V) 20 Vout (Min) (V) 1.2 Noise (uVrms) 45 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 51 Load capacitance (Min) (µF) 10 Rating Catalog Regulated outputs (#) 1 Features Enable, Reverse Current Protection, Reverse Voltage Protection Accuracy (%) 3 PSRR @ 100 KHz (dB) 45 Dropout voltage (Vdo) (Typ) (mV) 300 Operating temperature range (C) -40 to 125 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)

Features

  • Optimized for Fast Transient Response
  • Output Current: 1.0 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 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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Description

The TPS73801 is a low-dropout (LDO) regulator optimized for fast transient response. The device can supply 1.0 A of output current with a dropout voltage of 300 mV. Operating quiescent current is 1 mA, dropping to less than 1 µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the TPS73801 regulators have very low output noise, which makes them ideal for sensitive RF supply applications.

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

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Technical documentation

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Type Title Date
* Data sheet TPS73801 1.0-A Low-Noise Fast-Transient-Response Low-Dropout Regulator datasheet (Rev. C) Jul. 30, 2015
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
Application note Hybrid Battery Charger with Load Control for Telecom Equipments (Rev. A) May 09, 2018
Technical article LDO basics: noise – part 1 Jun. 14, 2017

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
5
Description

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.

Reference designs

REFERENCE DESIGNS Download
ADC-based, digitally-isolated, wide-input, 16-channel, AC/DC binary input reference design
TIDA-00420 This reference design showcases a cost-optimized and scalable ADC-based AC/DC binary input module (BIM) architecture with reinforced isolation. The 16 channels of a 10- or 12-bit SAR ADC are used for sensing multiple binary inputs. The op amps, in addition to keeping the cost per-channel low (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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

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