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Linear & low-dropout (LDO) regulators

TPS7A47

ACTIVE

1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable

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Data sheet
1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable

TPS7A47

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output, Programmable Output Iout (Max) (A) 1 Vin (Max) (V) 36 Vin (Min) (V) 3 Vout (Max) (V) 34 Vout (Min) (V) 1.4 Noise (uVrms) 4 Iq (Typ) (mA) 0.58 Thermal resistance θJA (°C/W) 33 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Enable, Soft Start Accuracy (%) 2.5 PSRR @ 100 KHz (dB) 60 Dropout voltage (Vdo) (Typ) (mV) 307 Operating temperature range (C) -40 to 125
Output options Adjustable Output, Programmable Output Iout (Max) (A) 1 Vin (Max) (V) 36 Vin (Min) (V) 3 Vout (Max) (V) 34 Vout (Min) (V) 1.4 Noise (uVrms) 4 Iq (Typ) (mA) 0.58 Thermal resistance θJA (°C/W) 33 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Enable, Soft Start Accuracy (%) 2.5 PSRR @ 100 KHz (dB) 60 Dropout voltage (Vdo) (Typ) (mV) 307 Operating temperature range (C) -40 to 125
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  • Input Voltage Range: +3 V to +36 V
  • Output Voltage Noise:
    4 µVRMS (10 Hz, 100 kHz)
  • Power-Supply Ripple Rejection:
    • 82 dB (100 Hz)
    • > 55 dB (10 Hz, 10 MHz)
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable
      Output via PCB Layout):
      • No External Feedback Resistors or
        Feed-Forward Capacitors Required
      • Output Voltage Range: +1.4 V to +20.5 V
    • Adjustable Version (TPS7A4701 only):
      • Output Voltage Range: +1.4 V to +34 V
  • Output Current: 1 A
  • Dropout Voltage: 307 mV at 1 A
  • CMOS Logic Level-Compatible Enable Pin
  • Built-In Fixed Current Limit and
    Thermal Shutdown
  • Available in High-Performance Thermal Package:
    5-mm × 5-mm QFN
  • Operating Temperature Range:
    –40°C to 125°C
  • Input Voltage Range: +3 V to +36 V
  • Output Voltage Noise:
    4 µVRMS (10 Hz, 100 kHz)
  • Power-Supply Ripple Rejection:
    • 82 dB (100 Hz)
    • > 55 dB (10 Hz, 10 MHz)
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable
      Output via PCB Layout):
      • No External Feedback Resistors or
        Feed-Forward Capacitors Required
      • Output Voltage Range: +1.4 V to +20.5 V
    • Adjustable Version (TPS7A4701 only):
      • Output Voltage Range: +1.4 V to +34 V
  • Output Current: 1 A
  • Dropout Voltage: 307 mV at 1 A
  • CMOS Logic Level-Compatible Enable Pin
  • Built-In Fixed Current Limit and
    Thermal Shutdown
  • Available in High-Performance Thermal Package:
    5-mm × 5-mm QFN
  • Operating Temperature Range:
    –40°C to 125°C
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The TPS7A47 is a family of positive voltage (+36 V), ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) capable of sourcing a 1-A load.

The TPS7A4700 output voltages are user-programmable (up to 20.5 V) using a printed circuit board (PCB) layout without the need of external resistors or feed-forward capacitors, thus reducing overall component count.

The TPS7A4701 output voltage can be configured with a user-programmable PCB layout (up to 20.5 V), or adjustable (up to 34 V) with external feedback resistors.

The TPS7A47 is designed with bipolar technology primarily for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry in critical applications such as medical, radio frequency (RF), and test-and-measurement.

In addition, the TPS7A47 is ideal for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversions, maximum system performance is ensured in sensitive instrumentation, test-and-measurement, audio, and RF applications.

For applications where positive and negative low-noise rails are required, consider TI’s TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

The TPS7A47 is a family of positive voltage (+36 V), ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) capable of sourcing a 1-A load.

The TPS7A4700 output voltages are user-programmable (up to 20.5 V) using a printed circuit board (PCB) layout without the need of external resistors or feed-forward capacitors, thus reducing overall component count.

The TPS7A4701 output voltage can be configured with a user-programmable PCB layout (up to 20.5 V), or adjustable (up to 34 V) with external feedback resistors.

The TPS7A47 is designed with bipolar technology primarily for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry in critical applications such as medical, radio frequency (RF), and test-and-measurement.

In addition, the TPS7A47 is ideal for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversions, maximum system performance is ensured in sensitive instrumentation, test-and-measurement, audio, and RF applications.

For applications where positive and negative low-noise rails are required, consider TI’s TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

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TPS7A88 ACTIVE 1-A, low-noise, high-PSRR, dual-channel adjustable ultra-low-dropout voltage regulator A dual-channel, low noise, 1-A LDO.
TPS7A91 ACTIVE 1-A, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy A single-channel, low-noise, 1-A LDO

Technical documentation

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Type Title Date
* Data sheet TPS7A470x 36-V, 1-A, 4-µVRMS, RF LDO Voltage Regulator datasheet (Rev. F) 01 Oct 2014
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note LDO Noise Demystified (Rev. B) 18 Aug 2020
Technical article Choosing buck converters and LDOs for miniature industrial automation equipment: what to consider 29 Jan 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Technical article Designing a pre-tracking regulator, part 1: for a positive-output LDO 18 Feb 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
Technical article Designing a power supply solution for pipeline ADCs – Part 1 03 Sep 2015
White paper How to measure LDO noise 24 Jul 2015
User guide TPS7A47xx User's Guide (Rev. A) 02 Aug 2013
Analog design journal 1Q 2013Issue Analog Applications Journal 22 Jan 2013
Analog design journal How to pick a linear regulator for noise-sensitive applications 22 Jan 2013
Application note ANY-OUT™ LDO Controlled by I2C™ IO Expander Device (Rev. A) 20 Sep 2012

Design & development

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Simulation model

TPS7A4700 PSpice Transient Model (Rev. A)

SBVM190A.ZIP (40 KB) - PSpice Model
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Simulation model

TPS7A4700 TINA-TI Transient Reference Design

SBVM302.TSC (776 KB) - TINA-TI Reference Design
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Simulation model

TPS7A4700 TINA-TI Transient Spice Model

SBVM303.ZIP (10 KB) - TINA-TI Spice Model
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Simulation model

TPS7A4701 PSpice Transient Model (Rev. A)

SBVM364A.ZIP (40 KB) - PSpice Model
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Simulation model

TPS7A4701 TINA-TI Transient Reference Design

SBVM401.ZIP (15 KB) - TINA-TI Reference Design
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Simulation model

TPS7A4701 TINA-TI Transient Spice Model

SBVM402.ZIP (9 KB) - TINA-TI Spice Model
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Simulation model

TPS7A4701 Unencrypted PSpice Transient Model (Rev. A)

SBVM621A.ZIP (2 KB) - PSpice Model
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Simulation model

TPS7A4700 Unencrypted PSpice Model

SBVM663.ZIP (1 KB) - PSpice Model
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Simulation model

TPS7A4700 Unencrypted PSpice Transient Model

SBVM939.ZIP (2 KB) - PSpice Model
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