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Linear & low-dropout (LDO) regulators

TPS7A90

ACTIVE

500-mA, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy

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Data sheet

TPS7A90

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 0.5 Vin (max) (V) 6.5 Vin (min) (V) 1.4 Vout (max) (V) 5.7 Vout (min) (V) 0.8 Rating Catalog Noise (µVrms) 4.7 PSRR at 100 KHz (dB) 48 Iq (typ) (mA) 2.1 Thermal resistance θJA (°C/W) 57 Load capacitance (min) (µF) 22 Regulated outputs (#) 1 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 0.5 Vin (max) (V) 6.5 Vin (min) (V) 1.4 Vout (max) (V) 5.7 Vout (min) (V) 0.8 Rating Catalog Noise (µVrms) 4.7 PSRR at 100 KHz (dB) 48 Iq (typ) (mA) 2.1 Thermal resistance θJA (°C/W) 57 Load capacitance (min) (µF) 22 Regulated outputs (#) 1 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
WSON (DSK) 10 6.25 mm² 2.5 x 2.5
  • 1.0% accuracy over line, load, and temperature
  • Low output noise: 4.7 µVRMS (10 Hz–100 kHz)
  • Low dropout: 100 mV (max) at 0.5 A
  • Wide input voltage range: 1.4 V to 6.5 V
  • Wide output voltage range: 0.8 V to 5.7 V
  • High power-supply rejection ratio (PSRR):
    • 60 dB at DC
    • 50 dB at 100 kHz
    • 30 dB at 1 MHz
  • Fast transient response
  • Adjustable start-up in-rush control with selectable soft-start charging current
  • Open-drain power-good (PG) output
  • RθJC = 3.2ºC/W
  • 2.5-mm × 2.5-mm, 10-pin WSON package
  • 1.0% accuracy over line, load, and temperature
  • Low output noise: 4.7 µVRMS (10 Hz–100 kHz)
  • Low dropout: 100 mV (max) at 0.5 A
  • Wide input voltage range: 1.4 V to 6.5 V
  • Wide output voltage range: 0.8 V to 5.7 V
  • High power-supply rejection ratio (PSRR):
    • 60 dB at DC
    • 50 dB at 100 kHz
    • 30 dB at 1 MHz
  • Fast transient response
  • Adjustable start-up in-rush control with selectable soft-start charging current
  • Open-drain power-good (PG) output
  • RθJC = 3.2ºC/W
  • 2.5-mm × 2.5-mm, 10-pin WSON package

The TPS7A90 is a low-noise (4.7 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 500 mA with only 100 mV of maximum dropout to 5 V and 200 mV to 5.7 V.

The TPS7A90 output is adjustable with external resistors from 0.8 V to 5.7 V. The TPS7A90 wide input voltage range supports operation as low as 1.4 V and up to 6.5 V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A90 is ideal for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs)].

The TPS7A90 is designed to power noise-sensitive components such as those found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7-µVRMS output noise and wideband PSRR (30 dB at 1 MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

The TPS7A90 is a low-noise (4.7 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 500 mA with only 100 mV of maximum dropout to 5 V and 200 mV to 5.7 V.

The TPS7A90 output is adjustable with external resistors from 0.8 V to 5.7 V. The TPS7A90 wide input voltage range supports operation as low as 1.4 V and up to 6.5 V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A90 is ideal for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs)].

The TPS7A90 is designed to power noise-sensitive components such as those found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7-µVRMS output noise and wideband PSRR (30 dB at 1 MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.
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Technical documentation

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Type Title Date
* Data sheet TPS7A90 500-mA, High-Accuracy, Low-Noise LDO Voltage Regulator datasheet (Rev. A) PDF | HTML 29 Jun 2020
White paper Parallel LDO Architecture Design Using Ballast Resistors PDF | HTML 14 Dec 2022
White paper Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast PDF | HTML 13 Dec 2022
Application note High-Performance CMOS Image Sensor Power Supply in Industrial Camera and Vision (Rev. A) 30 Jul 2021
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
EVM User's guide TPS7A91EVM-831 Evaluation Module User's Guide 29 Nov 2016

Design & development

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

Evaluation board

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Evaluation board

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Simulation model

TPS7A9001 PSpice Transient Model

SBVM709.ZIP (92 KB) - PSpice Model
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Simulation model

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Calculation tool

PARALLEL-LDO-CALC — Parallel low-dropout (LDO) calculator

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Supported products & hardware

Supported products & hardware

Products
Linear & low-dropout (LDO) regulators
TPS7A33 — 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable TPS7A47 — 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A47-Q1 — Automotive 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A4701-EP — Enhanced product, 36-V, 1-A, 4-μVRMS, RF LDO voltage regular TPS7A52 — 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A52-Q1 — Automotive 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A53 — 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53-Q1 — Automotive, 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53A-Q1 — Automotive, 3-A, low-VIN 5.6-µVRMS low-noise high-accuracy ultra-low dropout voltage regulator TPS7A53B — 3-A, 1.1-V, low-VIN, low-noise high-accuracy ultra-low-dropout voltage regulator with 0.5-V low VREF TPS7A54 — 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A54-Q1 — Automotive 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A57 — 5-A, low-input-voltage, low-noise, high-accuracy low-dropout (LDO) voltage regulator TPS7A83A — 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A84A — 3-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A85A — 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A94 — 1-A, ultra-low noise, ultra-high PSRR, RF voltage regulator TPS7B7702-Q1 — Automotive 300-mA, off-battery (40-V), dual-channel adjustable antenna low-dropout voltage regulator TPS7A8300 — 2-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi TPS7A84 — 3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A85 — 4-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A96 — 2-A, ultra-low noise ultra-high PSRR RF voltage regulator TPS7A4501-SP — Radiation-hardened, QMLV, 1.5-V to 20-V input 1.5-A low-dropout (LDO) regulator TPS7H1111-SP — Radiation-hardened, QMLV and QMLP, 1.5A ultra-low-noise high-PSRR low-dropout (LDO) regulator TPS7H1111-SEP — Radiation-tolerant, 1.5A, ultra-low-noise ultra-high-PSRR RF LDO regulator TPS7A90 — 500-mA, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy TPS7A91 — 1-A, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy TPS7A92 — 2-A, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy
Hardware development
Evaluation board
TPS7A57EVM-081 — TPS7A57 evaluation module for 5-A low-noise high-accuracy low-dropout (LDO) voltage regulator
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Reference designs

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Design guide: PDF
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Reference designs

TIDA-01024 — High Channel Count JESD204B Daisy Chain Clock Reference Design for RADAR and 5G Wireless Testers

High-speed multi-channel applications require low noise and scalable clocking solutions capable of precise channel-to-channel skew adjustment to achieve optimal system SNR, SFDR, and ENOB. This reference design supports scaling up JESD204B synchronized clocks in daisy chain configuration. This (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010131 — Multichannel RF transceiver clocking reference design for RADARs and wireless 5G testers

Analog front end for high-speed end equipments like phased-array radars, wireless communication testers, and electronic warfare require synchronized, multipletransceiver signal chains. Each transceiver signal chain includes high-speed, analog-to-digital converters (ADCs), digital-to-analog (...)
Design guide: PDF
Schematic: PDF
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