REG101

ACTIVE

100-mA, 10-V, low-dropout voltage regulator with enable

A newer version of this product is available

open-in-new Compare alternates
This product continues to be available for existing customers. New designs should consider an alternate product.
Drop-in replacement with upgraded functionality to the compared device
LP2985 ACTIVE 150-mA, 16-V, low-dropout voltage regulator with enable Wider voltage range
TPS7A24 ACTIVE 200-mA, 18-V, ultra-low-IQ, low-dropout (LDO) voltage regulator with enable Wider voltage range

Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 10 Vin (min) (V) 1.8 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 2.8, 2.85, 3, 3.3, 5 Noise (µVrms) 23 Iq (typ) (mA) 0.4 Thermal resistance θJA (°C/W) 150 Rating Catalog Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Features Enable, Foldback Overcurrent protection, Foldback overcurrent protection Accuracy (%) 2 PSRR at 100 KHz (dB) 46 Dropout voltage (Vdo) (typ) (mV) 60 Operating temperature range (°C) -40 to 85
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 10 Vin (min) (V) 1.8 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 2.8, 2.85, 3, 3.3, 5 Noise (µVrms) 23 Iq (typ) (mA) 0.4 Thermal resistance θJA (°C/W) 150 Rating Catalog Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Features Enable, Foldback Overcurrent protection, Foldback overcurrent protection Accuracy (%) 2 PSRR at 100 KHz (dB) 46 Dropout voltage (Vdo) (typ) (mV) 60 Operating temperature range (°C) -40 to 85
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • NEW DMOS TOPOLOGY:
    • Ultra Low Dropout Voltage:
      • 60mV typ at 100mA
      • Output capacitor NOT required for stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 23 µVrms
  • HIGH ACCURACY: ±1.5% max
  • HIGH EFFICIENCY:
    • IGND = 500 µA at IOUT = 100mA
    • Not Enabled: IGND = 10nA
  • 2.5V,2.8V,2.85V,3.0V,3.3V,5.0V,AND ADJUSTABLE OUTPUT VERSIONS
  • OTHER OUTPUT VOLTAGES AVAILABLE UPON REQUEST
  • FOLDBACK CURRENT LIMIT
  • THERMAL PROTECTION
  • SMALL SURFACE-MOUNT PACKAGES:
    • SOT23-5 and SO-8
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • PERSONAL DIGITAL ASSISTANTS
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

All trademarks are the property of their respective owners.

  • NEW DMOS TOPOLOGY:
    • Ultra Low Dropout Voltage:
      • 60mV typ at 100mA
      • Output capacitor NOT required for stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 23 µVrms
  • HIGH ACCURACY: ±1.5% max
  • HIGH EFFICIENCY:
    • IGND = 500 µA at IOUT = 100mA
    • Not Enabled: IGND = 10nA
  • 2.5V,2.8V,2.85V,3.0V,3.3V,5.0V,AND ADJUSTABLE OUTPUT VERSIONS
  • OTHER OUTPUT VOLTAGES AVAILABLE UPON REQUEST
  • FOLDBACK CURRENT LIMIT
  • THERMAL PROTECTION
  • SMALL SURFACE-MOUNT PACKAGES:
    • SOT23-5 and SO-8
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • PERSONAL DIGITAL ASSISTANTS
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

All trademarks are the property of their respective owners.

The REG101 is a family of low-noise, low-dropout linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low dropout voltage (only 60mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 500µA (at IOUT = 100mA) and drops to 10nA when not in enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variation and under dropout conditions.

The REG101 has very low output noise (typically 23µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. Accuracy is maintained over temperature, line, and load variations. Key parameters are guaranteed over the specified temperature range (-40°C to +85°C).

The REG101 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG101 is available in the SOT23-5 and the SO-8 packages.

The REG101 is a family of low-noise, low-dropout linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low dropout voltage (only 60mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 500µA (at IOUT = 100mA) and drops to 10nA when not in enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variation and under dropout conditions.

The REG101 has very low output noise (typically 23µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. Accuracy is maintained over temperature, line, and load variations. Key parameters are guaranteed over the specified temperature range (-40°C to +85°C).

The REG101 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG101 is available in the SOT23-5 and the SO-8 packages.

Download View video with transcript Video

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 DMOS 100mA Low-Dropout Regulator datasheet (Rev. D) 08 Sep 2005
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017
Application note Packaging Limits Range of Linear Regulators 08 May 2010
User guide DEM-SOT23LDO Demonstration Fixture User's Guide (Rev. A) 02 Jun 2005
More literature DMOS Delivers Dramatic Performance Gains to LDO Regulators (EDN mag) 14 Feb 2001

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

User guide: PDF
Not available 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.

User guide: PDF
Not available on TI.com
Evaluation board

TPS76933EVM-127 — TPS76933 evaluation module for SOT-23 LDO voltage regulator with 5-V to 3.3-V 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.

User guide: PDF
Not available on TI.com
Evaluation board

TPS79301EVM — TPS79301 Evaluation Module

User guide: PDF
Not available on TI.com
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 (...)

User guide: PDF
Not available on TI.com
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian

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
Information included:
  • Fab location
  • Assembly location

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