Product details

Output options Adjustable Output, Fixed Output Iout (Max) (A) 0.15 Vin (Max) (V) 5.5 Vin (Min) (V) 1.8 Vout (Max) (V) 2.5 Vout (Min) (V) 1.23 Fixed output options (V) 1.5, 1.6, 1.8 Noise (uVrms) 90 Iq (Typ) (mA) 0.085 Thermal resistance θJA (°C/W) 66 Rating Catalog Load capacitance (Min) (µF) 0.1 Regulated outputs (#) 1 Features Enable Accuracy (%) 3 PSRR @ 100 KHz (dB) 8 Dropout voltage (Vdo) (Typ) (mV) 150 Operating temperature range (C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (Max) (A) 0.15 Vin (Max) (V) 5.5 Vin (Min) (V) 1.8 Vout (Max) (V) 2.5 Vout (Min) (V) 1.23 Fixed output options (V) 1.5, 1.6, 1.8 Noise (uVrms) 90 Iq (Typ) (mA) 0.085 Thermal resistance θJA (°C/W) 66 Rating Catalog Load capacitance (Min) (µF) 0.1 Regulated outputs (#) 1 Features Enable Accuracy (%) 3 PSRR @ 100 KHz (dB) 8 Dropout voltage (Vdo) (Typ) (mV) 150 Operating temperature range (C) -40 to 125
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • 150-mA LDO
  • Available in 1.5-V, 1.6-V, 1.8-V Fixed-Output and Adjustable (1.2-V to 2.5-V) Versions
  • Low Input Voltage Requirement (Down to 1.8 V)
  • Small Output Capacitor, 0.1-µF
  • Dropout Voltage Typically 200 mV at 150 mA
  • Less Than 1 µA Quiescent Current in Shutdown Mode
  • Thermal Protection
  • Over Current Limitation
  • 5-Pin SOT-23 (DBV) Package
  • APPLICATIONS
    • Portable Communication Devices
    • Battery Powered Equipment
    • PCMCIA Cards
    • Personal Digital Assistants
    • Modems
    • Bar Code Scanners
    • Backup Power Supplies
    • SMPS Post Regulation
    • Internet Audio

  • 150-mA LDO
  • Available in 1.5-V, 1.6-V, 1.8-V Fixed-Output and Adjustable (1.2-V to 2.5-V) Versions
  • Low Input Voltage Requirement (Down to 1.8 V)
  • Small Output Capacitor, 0.1-µF
  • Dropout Voltage Typically 200 mV at 150 mA
  • Less Than 1 µA Quiescent Current in Shutdown Mode
  • Thermal Protection
  • Over Current Limitation
  • 5-Pin SOT-23 (DBV) Package
  • APPLICATIONS
    • Portable Communication Devices
    • Battery Powered Equipment
    • PCMCIA Cards
    • Personal Digital Assistants
    • Modems
    • Bar Code Scanners
    • Backup Power Supplies
    • SMPS Post Regulation
    • Internet Audio

The TPS721xx family of LDO regulators is available in fixed voltage options that are commonly used to power the latest DSPs and microcontrollers with an adjustable option ranging from 1.22 V to 2.5 V. These regulators can be used in a wide variety of applications ranging from portable, battery-powered equipment to PC peripherals. The family features operation over a wide range of input voltages (1.8 V to 5.5 V) and low dropout voltage (150 mV at full load). Therefore, compared to many other regulators that require 2.5-V or higher input voltages for operation, these regulators can be operated directly from two AAA batteries. Also, the typical quiescent current (ground pin current) is low, starting at 85 µA during normal operation and 1 µA in shutdown mode. These regulators can be operated very efficiently and, in a battery-powered application, help extend the longevity of the device.

Similar LDO regulators require 1-µF or larger output capacitors for stability. However, this regulator uses an internal compensation scheme that stabilizes the feedback loop over the full range of input voltages and load currents with output capacitances as low as 0.1-µF. Ceramic capacitors of this size are relatively inexpensive and available in small footprints.

This family of regulators is particularly suited as a portable power supply solution due to its minimal board space requirement and 1.8-V minimum input voltage. Being able to use two off-the-shelf AAA batteries makes system design easier and also reduces component cost. Moreover, the solution will be more efficient than if a regulator with a higher input voltage is used.

The TPS721xx family of LDO regulators is available in fixed voltage options that are commonly used to power the latest DSPs and microcontrollers with an adjustable option ranging from 1.22 V to 2.5 V. These regulators can be used in a wide variety of applications ranging from portable, battery-powered equipment to PC peripherals. The family features operation over a wide range of input voltages (1.8 V to 5.5 V) and low dropout voltage (150 mV at full load). Therefore, compared to many other regulators that require 2.5-V or higher input voltages for operation, these regulators can be operated directly from two AAA batteries. Also, the typical quiescent current (ground pin current) is low, starting at 85 µA during normal operation and 1 µA in shutdown mode. These regulators can be operated very efficiently and, in a battery-powered application, help extend the longevity of the device.

Similar LDO regulators require 1-µF or larger output capacitors for stability. However, this regulator uses an internal compensation scheme that stabilizes the feedback loop over the full range of input voltages and load currents with output capacitances as low as 0.1-µF. Ceramic capacitors of this size are relatively inexpensive and available in small footprints.

This family of regulators is particularly suited as a portable power supply solution due to its minimal board space requirement and 1.8-V minimum input voltage. Being able to use two off-the-shelf AAA batteries makes system design easier and also reduces component cost. Moreover, the solution will be more efficient than if a regulator with a higher input voltage is used.

Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet TPS721xx: Low Input Voltage, Cap Free 150-mA Low-Dropout Regulators datasheet (Rev. C) 31 Mar 2006
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note LDO Noise Demystified (Rev. B) 18 Aug 2020
Application note LDO PSRR Measurement Simplified (Rev. A) 09 Aug 2017
User guide Universal Low-Dropout (LDO) Linear Voltage Regulator EVM User's Guide 12 Oct 2016
User guide DEM-SOT23LDO Demonstration Fixture User's Guide (Rev. A) 02 Jun 2005

Design & development

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

Evaluation board

DEM-SOT23LDO — DEM-SOT23LDO Compatible With Most Positive-Output LDO Regulators in 5- or 6-Lead SOT23 (DBV) Package

Out of stock on TI.com
Evaluation board

TPS76901EVM-127 — SOT-23 LDO, 5-V to 1.8-V, 100-mA output power supply

The TPS76901EVM-127 evaluation module (EVM) provides designers with an easy layout for using and evaluating the TPS76901 SOT-23 LDO in an application to regulate from 5 V to a selectable output. The EVM includes input and output capacitors.

In stock
Limit: 5
Evaluation board

TPS76918EVM-127 — SOT23 LDO, 5 V to 3.3 V, 100mA output power supply

The TPS76918EVM-127 give designer an easy layout for using and evaluating TPS76918 SOT23 LDO in an application to regulate from 5V to a 1.8V output. It includes input and output capacitors.

In stock
Limit: 5
Evaluation board

TPS76933EVM-127 — SOT-23 LDO, 5-V to 1-V, 100-mA output power supply

The TPS76933EVM-127 evaluation module (EVM) provides designers with an easy layout for using and evaluating the TPS76933 SOT-23 LDO in an application to regulate from 5 V to a 3.3-V output. The EVM includes input and output capacitors.

In stock
Limit: 5
Evaluation board

TPS79301EVM — TPS79301 Evaluation Module

In stock
Limit: 5
Evaluation board

TPS79328EVM — TPS79328 Evaluation Module

The purpose of this EVM is to facilitate evaluation of the TPS793xx family of LDO regulators. Each EVM package contains one SLVP191 test board, with either a TPS79301DBV linear regulator or a TPS79328DBV linear regulator, as well as supporting passive components. The TPS79301DBV adjustable device (...)

In stock
Limit: 5
Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos