TPS791

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100-mA, low-noise, low-dropout voltage regulator with enable

TPS791 is in the process of being discontinued
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TPS784 ACTIVE 300-mA, low-IQ, high-PSRR, low-dropout (LDO) voltage regulator with high accuracy and enable Better accuracy with active high enable
TPS7A20 ACTIVE 300-mA ultra-low-noise low-IQ low-dropout (LDO) linear regulator with high PSRR Higher PSRR and better noise with active high enable

Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 5.2 Vout (min) (V) 1.2 Fixed output options (V) 1.8, 3.3, 4.7 Noise (µVrms) 15 Iq (typ) (mA) 0.17 Thermal resistance θJA (°C/W) 178, 192.6 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 45 Dropout voltage (Vdo) (typ) (mV) 38 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 5.2 Vout (min) (V) 1.2 Fixed output options (V) 1.8, 3.3, 4.7 Noise (µVrms) 15 Iq (typ) (mA) 0.17 Thermal resistance θJA (°C/W) 178, 192.6 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 45 Dropout voltage (Vdo) (typ) (mV) 38 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • 100-mA Low-Dropout Regulator With EN
  • Available in 1.8-V, 3.3-V, 4.7-V, and Adj.
  • High PSRR (70 dB at 10 kHz)
  • Ultralow Noise (15 µVRMS)
  • Fast Start-Up Time (63 µs)
  • Stable With Any 1-µF Ceramic Capacitor
  • Excellent Load, Line Transient
  • Very Low Dropout Voltage (38 mV at Full Load, TPS79147)
  • 5-Pin SOT23 (DBV) Package
  • TPS792xx Provides EN Options
  • 100-mA Low-Dropout Regulator With EN
  • Available in 1.8-V, 3.3-V, 4.7-V, and Adj.
  • High PSRR (70 dB at 10 kHz)
  • Ultralow Noise (15 µVRMS)
  • Fast Start-Up Time (63 µs)
  • Stable With Any 1-µF Ceramic Capacitor
  • Excellent Load, Line Transient
  • Very Low Dropout Voltage (38 mV at Full Load, TPS79147)
  • 5-Pin SOT23 (DBV) Package
  • TPS792xx Provides EN Options

The TPS791 device is a low-dropout (LDO) low-power linear voltage regulator that features high power-supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in a small outline, SOT23 package. The device is stable, with a small 1-µF ceramic capacitor on the output. The TPS791 uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 38 mV at 100 mA, TPS79147). This device achieves fast start-up times (approximately 63 µs with a 0.001-µF bypass capacitor) while consuming very low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79118 exhibits approximately 15 µVRMS of output voltage noise with a 0.1-µF bypass capacitor. Applications with analog components that are noise sensitive, such as portable RF electronics, benefit from the high PSRR and low noise features as well as the fast response time.






The TPS791 device is a low-dropout (LDO) low-power linear voltage regulator that features high power-supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in a small outline, SOT23 package. The device is stable, with a small 1-µF ceramic capacitor on the output. The TPS791 uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 38 mV at 100 mA, TPS79147). This device achieves fast start-up times (approximately 63 µs with a 0.001-µF bypass capacitor) while consuming very low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79118 exhibits approximately 15 µVRMS of output voltage noise with a 0.1-µF bypass capacitor. Applications with analog components that are noise sensitive, such as portable RF electronics, benefit from the high PSRR and low noise features as well as the fast response time.






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Technical documentation

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* Data sheet TPS791 Ultralow Noise, High PSRR, Fast RF 100-mA Low-Dropout Linear Regulators datasheet (Rev. D) PDF | HTML 01 Feb 2018

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
Reference designs

TIDA-01576 — High accuracy analog input module reference design with 16-bit 1-MSPS dual simultaneous-sampling ADC

This reference design accurately measures 16-channel AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range. This range covers protection and measurement requirements (including sampling requirements as per IEC 61850-9-2), which simplifies system design and improves (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01013 — Low Power, Low Noise 24b Analog Front-End Reference Design for DAQ and Wireless Sensor IoT Systems

The need for lower power, lower noise analog front-ends (AFE) is becoming increasingly important in many applications today, such as data acquisition systems (DAQs), field instrumentation, Internet-of-Things (IoT), and automatic test equipment. In many cases, this need is highlighted by the advent (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01214 — Isolated, High-Accuracy Analog Input Module Reference Design Using 16-Bit ADC and Digital Isolator

This reference design provides accurate measurements of AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range, covering protection and measurement range (including sampling requirements of IEC 61850-9-2), simplifying system design and improving trip time (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBV) 6 View options
SOT-23 (DBV) 5 View options

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