Product details

Output options Adjustable Output Iout (Max) (A) 1 Vin (Max) (V) 5.7 Vin (Min) (V) 1.7 Vout (Max) (V) 5.5 Vout (Min) (V) 0 Noise (uVrms) 0.46 Iq (Typ) (mA) 15 Thermal resistance θJA (°C/W) 46 Rating Catalog Load capacitance (Min) (µF) 4.7 Regulated outputs (#) 1 Features Adjustable current limit, Enable, Foldback overcurrent protection, Output discharge, Power good, Soft start Accuracy (%) 1 PSRR @ 100 KHz (dB) 78 Dropout voltage (Vdo) (Typ) (mV) 150 Operating temperature range (C) -40 to 125
Output options Adjustable Output Iout (Max) (A) 1 Vin (Max) (V) 5.7 Vin (Min) (V) 1.7 Vout (Max) (V) 5.5 Vout (Min) (V) 0 Noise (uVrms) 0.46 Iq (Typ) (mA) 15 Thermal resistance θJA (°C/W) 46 Rating Catalog Load capacitance (Min) (µF) 4.7 Regulated outputs (#) 1 Features Adjustable current limit, Enable, Foldback overcurrent protection, Output discharge, Power good, Soft start Accuracy (%) 1 PSRR @ 100 KHz (dB) 78 Dropout voltage (Vdo) (Typ) (mV) 150 Operating temperature range (C) -40 to 125
WSON (DSC) 10 9 mm² 3 x 3
  • Ultra-low output noise:
    • 0.46 µVRMS (typ, 10 Hz to 100 kHz)
  • High power-supply ripple rejection (PSRR):
    • 102 dB at 100Hz
    • 110 dB at 1 kHz
    • 95 dB at 10 kHz
    • 78 dB at 100 kHz
    • 50 dB at 1 MHz
  • Accuracy over line, load, and temperature: 1%
  • Low dropout: 150 mV at 1 A
  • Wide input voltage range: 1.7 V to 5.7 V
  • Wide output voltage range: 0 V to 5.5 V
  • Parallelable for lower noise and higher current
  • Fast transient response
  • Precision enable and UVLO
  • Programmable current limit
  • Programmable PG threshold
  • Adjustable start-up inrush control
  • Open-drain, power-good (PG) output
  • Package: 3.00-mm × 3.00-mm, 10-pin WSON:
    • JEDEC RθJA: 46.1°C/W
    • EVM RθJA: 25.6°C/W
  • Ultra-low output noise:
    • 0.46 µVRMS (typ, 10 Hz to 100 kHz)
  • High power-supply ripple rejection (PSRR):
    • 102 dB at 100Hz
    • 110 dB at 1 kHz
    • 95 dB at 10 kHz
    • 78 dB at 100 kHz
    • 50 dB at 1 MHz
  • Accuracy over line, load, and temperature: 1%
  • Low dropout: 150 mV at 1 A
  • Wide input voltage range: 1.7 V to 5.7 V
  • Wide output voltage range: 0 V to 5.5 V
  • Parallelable for lower noise and higher current
  • Fast transient response
  • Precision enable and UVLO
  • Programmable current limit
  • Programmable PG threshold
  • Adjustable start-up inrush control
  • Open-drain, power-good (PG) output
  • Package: 3.00-mm × 3.00-mm, 10-pin WSON:
    • JEDEC RθJA: 46.1°C/W
    • EVM RθJA: 25.6°C/W

The TPS7A94 is an ultra-low-noise (0.46 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1 A with only 150 mV of dropout. The low dropout, in conjunction with a wide bandwidth error amplifier, allows for very high PSRR (110 dB at 1 kHz and 50 dB at 1 MHz) under low operating headroom (500 mV) and high output current (750 mA).

The device output is adjustable from 0 V to 5.5 V with an external resistor. With its wide input voltage range, the device supports operation as low as 1.7 V and up to 5.7 V. The device includes programmable current limit, programmable PG threshold, and precision enable, allowing better control in the application.

With its high-accuracy reference and wide-bandwidth topology, the device can be easily paralleled to achieve lower noise and higher current.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce inrush current, the device is an excellent choice for powering sensitive analog low-voltage devices.

The TPS7A94 is an ultra-low-noise (0.46 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1 A with only 150 mV of dropout. The low dropout, in conjunction with a wide bandwidth error amplifier, allows for very high PSRR (110 dB at 1 kHz and 50 dB at 1 MHz) under low operating headroom (500 mV) and high output current (750 mA).

The device output is adjustable from 0 V to 5.5 V with an external resistor. With its wide input voltage range, the device supports operation as low as 1.7 V and up to 5.7 V. The device includes programmable current limit, programmable PG threshold, and precision enable, allowing better control in the application.

With its high-accuracy reference and wide-bandwidth topology, the device can be easily paralleled to achieve lower noise and higher current.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce inrush current, the device is an excellent choice for powering sensitive analog low-voltage devices.

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Technical documentation

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Type Title Date
* Data sheet TPS7A94 1-A, Ultra-Low Noise, Ultra-High PSRR, Low-Dropout Regulator datasheet (Rev. A) PDF | HTML 04 May 2022
User guide TPS7A94EVM-046 Evaluation Module (Rev. B) PDF | HTML 04 Aug 2022
Technical article LDO basics: noise – how a noise-reduction pin improves system performance 14 Jun 2017

Design & development

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

Evaluation board

LMX2594PSEVM — LMX2594 evaluation module for 15-GHz RF synthesizer with for multiple-device phase synchronization

The LMX2594 evaluation module (EVM) is a platform for evaluating the phase-synchronization (PS) feature of the LMX2594 wideband RF synthesizer. LMX2594PSEVM contains two LMX2594 parts that share the same reference clock.

After phase synchronization, the phase of the parts' outputs can be (...)

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

TPS7A94EVM-046 — TPS7A94 evaluation module for 1-A, ultra-low noise, ultra-high PSRR, RF voltage regulator

The TPS7A94 evaluation module (EVM) helps design engineers evaluate the operation and performance of the TPS7A94 linear regulator for use in their own circuit application. This EVM configuration contains a single low-noise, small-size, linear regulator for a wide range of applications.

The regulator (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS7A94 PSpice Transient Model (600-mA Current Limit)

SBVM986.ZIP (66 KB) - PSpice Model
Simulation model

TPS7A94 PSpice Transient Model (800-mA Current Limit)

SBVM987.ZIP (68 KB) - PSpice Model
Simulation model

TPS7A94 PSpice Transient Model (1-A Current Limit)

SBVM988.ZIP (67 KB) - PSpice Model
Package Pins Download
WSON (DSC) 10 View options

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