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Linear & low-dropout (LDO) regulators

TPS7A49

ACTIVE

150-mA, 36-V, low-noise, high-PSRR, adjustable low-dropout voltage regulator with enable

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Data sheet

TPS7A49

ACTIVE
Data sheet Order now

Product details

Rating Catalog Vin (max) (V) 36 Vin (min) (V) 3 Iout (max) (A) 0.15 Output options Adjustable Output Vout (max) (V) 33 Vout (min) (V) 1.2 Noise (µVrms) 15 PSRR at 100 KHz (dB) 54 Iq (typ) (mA) 0.06 Features Enable, Soft start Thermal resistance θJA (°C/W) 48 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 260 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 36 Vin (min) (V) 3 Iout (max) (A) 0.15 Output options Adjustable Output Vout (max) (V) 33 Vout (min) (V) 1.2 Noise (µVrms) 15 PSRR at 100 KHz (dB) 54 Iq (typ) (mA) 0.06 Features Enable, Soft start Thermal resistance θJA (°C/W) 48 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 260 Operating temperature range (°C) -40 to 125
VSON (DRB) 8 9 mm² (3 mm × 3 mm) HVSSOP (DGN) 8 14.7 mm² (3 mm × 4.9 mm)
  • Input Voltage Range: 3 V to 36 V
  • Noise:
    • 12.7 µVRMS (20 Hz to 20 kHz)
    • 15.4 µVRMS (10 Hz to 100 kHz)
  • Power-Supply Ripple Rejection:
    • 72 dB (120 Hz)
    • ≥ 52 dB (10 Hz to 400 kHz)
  • Adjustable Output: 1.194 V to 33 V
  • Output Current: 150 mA
  • Dropout Voltage: 260 mV at 100 mA
  • Stable with Ceramic Capacitors ≥ 2.2 µF
  • CMOS Logic-Level-Compatible Enable Pin
  • Fixed Current-Limit and Thermal Shutdown Protection
  • Packages: 8-Pin HVSSOP PowerPAD™ and
    3-mm × 3-mm VSON
  • Operating Temperature Range:
    –40°C to 125°C
  • Input Voltage Range: 3 V to 36 V
  • Noise:
    • 12.7 µVRMS (20 Hz to 20 kHz)
    • 15.4 µVRMS (10 Hz to 100 kHz)
  • Power-Supply Ripple Rejection:
    • 72 dB (120 Hz)
    • ≥ 52 dB (10 Hz to 400 kHz)
  • Adjustable Output: 1.194 V to 33 V
  • Output Current: 150 mA
  • Dropout Voltage: 260 mV at 100 mA
  • Stable with Ceramic Capacitors ≥ 2.2 µF
  • CMOS Logic-Level-Compatible Enable Pin
  • Fixed Current-Limit and Thermal Shutdown Protection
  • Packages: 8-Pin HVSSOP PowerPAD™ and
    3-mm × 3-mm VSON
  • Operating Temperature Range:
    –40°C to 125°C

The TPS7A49 series of devices are positive, high-voltage (36 V), ultralow-noise (15.4 µVRMS, 72-dB PSRR) linear regulators that can source a 150-mA load.

These linear regulators include a CMOS logic-level-compatible enable pin and capacitor-programmable soft-start function that allows for customized power-management schemes. Other available features include built-in current limit and thermal shutdown protection to safeguard the device and system during fault conditions.

The TPS7A49 family is designed using bipolar technology, and is ideal for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This design makes the device an excellent choice to power operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.

In addition, the TPS7A49 family of linear regulators is suitable for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversion, maximum system performance is provided in sensitive instrumentation, test and measurement, audio, and RF applications.

For applications where positive and negative high-performance rails are required, consider TI’s TPS7A30xx family of negative high-voltage, ultralow-noise linear regulators as well.

The TPS7A49 series of devices are positive, high-voltage (36 V), ultralow-noise (15.4 µVRMS, 72-dB PSRR) linear regulators that can source a 150-mA load.

These linear regulators include a CMOS logic-level-compatible enable pin and capacitor-programmable soft-start function that allows for customized power-management schemes. Other available features include built-in current limit and thermal shutdown protection to safeguard the device and system during fault conditions.

The TPS7A49 family is designed using bipolar technology, and is ideal for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This design makes the device an excellent choice to power operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.

In addition, the TPS7A49 family of linear regulators is suitable for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversion, maximum system performance is provided in sensitive instrumentation, test and measurement, audio, and RF applications.

For applications where positive and negative high-performance rails are required, consider TI’s TPS7A30xx family of negative high-voltage, ultralow-noise linear regulators as well.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS7A49 36-V, 150-mA, Ultralow-Noise, Positive Linear Regulator datasheet (Rev. E) PDF | HTML May 26, 2015
White paper Demystifying LDO Turn-On (Start-Up) Time (Rev. B) PDF | HTML Mar 10, 2026
Application note An empirical analysis of the impact of board layout on LDO thermal performance (Rev. A) PDF | HTML Sep 23, 2025
White paper Parallel LDO Architecture Design Using Ballast Resistors PDF | HTML Dec 14, 2022
White paper Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast PDF | HTML Dec 13, 2022
Application note A Topical Index of TI LDO Application Notes (Rev. F) Jun 27, 2019
Application note Accurate Thermal Calculations on the Back of a Napkin Jun 3, 2019
E-book LDO Basics (Rev. A) Apr 8, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) Mar 21, 2018
Technical article LDO basics: dropout PDF | HTML Mar 16, 2017

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Package Pins CAD symbols, footprints & 3D models
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