Product details


Output options Adjustable Output, Negative and Positive, Negative Output, Dual Output Iout (Max) (A) 0.15 Vin (Max) (V) 33 Vin (Min) (V) -33 Vout (Max) (V) 30 Vout (Min) (V) 1.2 Noise (uVrms) 15 Iq (Typ) (mA) 0.075 Thermal resistance θJA (°C/W) 44 Load capacitance (Min) (µF) 10 Rating Catalog Regulated outputs (#) 2 Features Enable, Soft Start Accuracy (%) 2.5 PSRR @ 100 KHz (dB) 56 Dropout voltage (Vdo) (Typ) (mV) 238 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

WSON (DSC) 10 9 mm² 3 x 3 open-in-new Find other Linear regulators (LDO)


  • Positive and Negative LDOs in One Package
  • Wide Input Voltage Range: ±3.3 V to ±33 V
  • Wide Output Voltage Range:
    • Positive Range: 1.2 V to 30 V
    • Negative Range: –30 V to 0 V
  • Output Current: 150 mA per Channel
  • Monotonic Start-Up Tracking
  • High Power-Supply Rejection Ratio (PSRR):
    • 69 dB (120 Hz)
    • ≥ 50 dB (10 Hz to 2 MHz)
  • Output Voltage Noise: 21 µVRMS (10 Hz–100 kHz)
  • Buffered 1.2-V Reference Output
  • Stable With a 10-µF or Larger Output Capacitor
  • Single Positive-Logic Enable
  • Adjustable Soft-Start In-Rush Control
  • 3-mm × 3-mm, 10-Pin WSON Package
  • Low Thermal Resistance: RθJA = 44.4°C/W
  • Operating Temperature Range: –40 to +125°C
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The TPS7A39 device is a dual, monolithic, high-PSRR, positive and negative low-dropout (LDO) voltage regulator capable of sourcing (and sinking) up to 150 mA of current. The regulated outputs can be independently and externally adjusted to symmetrical or asymmetrical voltages, making this device an ideal dual, bipolar power supply for signal conditioning.

Both positive and negative outputs of the TPS7A39 ratiometrically track each other during startup to mitigate floating conditions and other power-supply sequencing issues common in dual-rail systems. The negative output can regulate up to 0 V, extending the common-mode range for single-supply amplifiers. The TPS7A39 also features high PSRR to eliminate power-supply noise, such as switching noise, that can compromise signal integrity.

Both regulators are controlled with a single positive logic enable pin for interfacing with standard digital logic. A capacitor-programmable soft-start function controls in-rush current and start-up time. The internal reference voltage of the TPS7A39 can be overridden with an external reference to enable precision outputs, output voltage margining, or to track other power supplies. Additionally, the TPS7A39 has a buffered reference output that can be used as a voltage reference for other components in the system.

These features make the TPS7A39 a robust, simplified solution to power operational amplifiers, digital-to-analog converters (DACs), and other precision analog circuitry.

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Technical documentation

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Type Title Date
* Data sheet TPS7A39 Dual, 150-mA, Wide VIN Positive and Negative LDO Voltage Regulator datasheet (Rev. A) Sep. 15, 2017
Technical article What’s not in the power MOSFET data sheet part 2: voltage-dependent leakage currents Jul. 23, 2021
Application note Powering a dual-supply op amp circuit with one LDO (Rev. A) Mar. 07, 2019
Technical article Improving sensor DAQ performance using the PRU-ICSS for grid protection and control Oct. 09, 2018
Technical article Interfacing multiple ADCs to a single processor for grid protection and control Sep. 13, 2018
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Application note Dual Bipolar Power-Supply Considerations for Amplifiers Aug. 01, 2017
User guide TPS7A39EVM-865 Evaluation Module User's Guide Jul. 20, 2017

Design & development

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

Hardware development

document-generic User guide

The TPS7A39EVM-865 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS7A39 150-mA tracking positive/negative low-dropout (LDO) voltage regulator.

The EVM circuit board is configured to be a reference design for engineering applications (...)

  • Wide input voltage range: ±3 V to ±33 V
  • Monotonic start-up tracking
  • Output voltage noise: 15 µVRMS
  • Programmable soft start
  • Buffered reference output

Design tools & simulation

SBVM711A.ZIP (53 KB) - PSpice Model
SBVM712A.ZIP (4 KB) - PSpice Model

Reference designs

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TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
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Flexible Interface (PRU-ICSS) Reference Design for Simultaneous, Coherent DAQ Using Multiple ADCs
TIDA-01555 — This reference design showcases an interface implementation for connecting multiple high voltage bipolar input, 8-channel, mux-input SAR ADCs (6) with the Sitara Arm processors for expanding the number of input channels using Programmable Real-time Unit (PRU-ICSS). ADCs are configured for (...)
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2.3 nV/√Hz, Differential, Time Gain Control (TGC) DAC Reference Design for Ultrasound
TIDA-01427 — The TIDA-01427 reference design provides a solution for differential signal chain used for generating a time-varying control voltage (VCNTL) to drive multiple AFE devices in a parallel configuration. TI's low-noise analog front ends (AFEs) for medical ultrasound have a time gain control (TGC (...)
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