Linear & low-dropout (LDO) regulators
With the largest portfolio of LDOs, we have the right one for you
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Low VIN (≤7 V)
Design for low-voltage applications with our broad portfolio of low-VIN LDOs.
Mid VIN (7 V to 30 V)
Design for multicell battery or other mid-voltage applications with our regulators.
Wide VIN (>30 V)
Enhance system reliability with our robust LDOs featuring input ranges above 30 V.
New products
Automotive, 70-mA 40-V voltage-tracking low-dropout regulator with FB and 6-mV tracking tolerance
Approx. price (USD) 1ku | 0.493
3-A, 1.1-V, low-VIN, low-noise high-accuracy ultra-low-dropout voltage regulator with 0.5-V low VREF
Approx. price (USD) 1ku | 1.19
Automotive, 70-mA 40-V voltage-tracking low-dropout (LDO) regulator with 5-mV tracking tolerance
Approx. price (USD) 1ku | 0.339
Automotive, 500-mA, low-noise ultra-low-IQ high-PSRR low-dropout (LDO) voltage regulator
Approx. price (USD) 1ku | 0.278
2-A, ultra-low noise ultra-high PSRR RF voltage regulator
Approx. price (USD) 1ku | 3.92
Radiation-tolerant, 1.5-A, ultra-low noise, ultra-high PSRR RF LDO regulator
Power trends
Power density
You can further improve your application’s performance when you consider thermals. An LDO’s nature is to regulate a voltage by turning excess power into heat, making this integrated circuit a good fit for low-power or small VIN-to-VOUT differential applications. Choosing the right LDO with the right package is crucial to maximizing an application’s performance.
LDO Basics: Thermals
An empirical analysis of the impact of board layout on LDO thermal performance
Measuring the Thermal Impedance of LDOs in situ
Featured products for power density
Low quiescent current (IQ)
We understand that achieving ultra-low quiescent current (IQ) shouldn’t compromise your system performance. We offer regulators with low standby power combined with excellent load transient response so that you can achieve the longest battery runtimes while maintaining key performance. Our linear regulator portfolio includes low-IQ LDOs with input voltages as high as 100 V to help you with your low-standby power needs.
Understanding the Foundations of Quiescent Current in Linear Power Systems
LDO Basics: Quiescent Current
Featured products for low quiescent current (IQ)
Low noise & precision
We can help solve your low-noise design challenges with a broad portfolio of low-noise and high power-supply rejection ratio (PSRR) regulators. High PSRR over a wide bandwidth enables the LDO to filter switching noise emanating from upstream DC/DC converters. Low-noise (<5 µVRMS) outputs minimize low-frequency noise to maintain the signal integrity of sensitive analog circuitry such as ADCs or DACs, helping you generate clean power for precision applications.
LDO Basics: Noise
LDO Basics: Power Supply Rejectino Ratio (PSRR)
How to measure LDO noise
Featured products for low noise & precision
Technical resources
LDO Basics (Rev. A)
Low Dropout Regulators Quick Reference Guide (Rev. P)
A Topical Index of TI LDO Application Notes (Rev. F)
Discover featured applications
Low-noise, high power-supply rejection ratio (PSRR) low-dropout regulators (LDOs) enable sensor loads to reach their peak performance – without compromising the life span of smart meters.
LDOs maximize measurement accuracy and reduce noise and power consumption in gas, electricity, heat and water meters. Our low standby current and low-noise LDOs can achieve longer battery run times while maintaining low transient performance.
Featured resources
- TIDA-00839 – Magnetic Tamper Detection Using Low-Power Hall Effect Sensors Reference Design
- TIDA-010008 – Flat-Clamp TVS based Reference Design for Protection Against Transient for Grid Applications
- Make metering more efficient – Technical article
- Linear power for automated industrial systems – Application note
Convert energy stored in a battery to instantaneous multiphase AC power for traction drives with highly accurate, high PSRR LDOs compliant with AEC-Q100 qualification testing.
Design efficient drivetrains with wide voltage range, low power consumption LDOs. Maintain clean rails with high PSRR and high accuracy over temperature, without compromising safety or performance.
Featured resources
- PMP23223 – Smart isolated gate driver with bias supply reference design
- TIDA-020014 – HEV/EV traction inverter power stage with 3 types of IGBT/SiC bias-supply solutions reference design
- TPS7B84-Q1 – Automotive 150-mA, 40-V, low-dropout (LDO) linear regulator with enable and fast transient response
- TPS7B86-Q1 – Automotive 500-mA, 40-V, ultra-low-IQ, low-dropout (LDO) linear regulator with power good
- TPS7B4253-Q1 – Automotive 300-mA, off-battery (40-V), adjustable voltage-tracking low-dropout voltage regulator
Provide clean, steady rails for analog front ends, field-programmable gate arrays (FPGAs) and digital signal processors with our highly accurate, high PSRR LDOs.
LDOs with a high PSRR and low noise make it possible to achieve precise and clean rails in medical imaging signal chains such as converters, clocks and FPGAs by generating a clean DC signal, which prevents the power supply from compromising noise-sensitive loads. Devices with low thermal resistance are also important in medical applications, given the combination of high input voltages and high current.
Featured resources
- TIDA-01352 – 400-W Continuous, Scalable, ±2.5- to ±150-V, Programmable Ultrasound Power Supply Reference Design
- TIDA-01458 – Low-Noise Fixed Drop-Out ±2.5 to ±12-VOUT 3A Power Supply Reference Design for Ultrasound CW Pulser
- PARALLEL-LDO-CALC – Parallel low-dropout (LDO) calculator
Create wearable medical and personal electronics that maximize battery run time with low quiescent current (IQ) in chipscale packages.
Our low-power low-dropout regulators enable extended battery life in chip-scale packaging for medical and commercial wearable electronics. Low-IQ devices minimize power consumption while wearable devices are in standby mode, without compromising performance.
Featured resources
- TIDA-00373 – Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Reference Design
- TIDA-050007 – Ultra-low Standby Power Reference Design for Wireless Earbud Battery
- PMP21884 – Tiny, ultra-low IQ DC/DC power supply with battery charging reference design for wearables
- No Tradeoffs: Linear Power Supplies for Ultra-Low Power and Dynamic Performance – Application note
- LDOs Thermal Performance in Small SMD Packages – Application note
Maintain clear rails in electric vehicle charging with AEC-Q100 LDOs.
Single-phase AC, 400-V onboard chargers and high- to low-voltage DC/DC converters in hybrid and electric vehicles are using low-cost LDOs with low noise to maintain stable voltage rails.
Featured resources
- TIDA-020030 – SiC/IGBT isolated gate driver reference design with thermal diode and sensing FET
- TIDA-020014 – HEV/EV traction inverter power stage with 3 types of IGBT/SiC bias-supply solutions reference design
- PMP30473 – Lowest noise auxiliary dual output power supply reference design
- TPS7B84-Q1 – Automotive 150-mA, 40-V, low-dropout (LDO) linear regulator with enable and fast transient response
- TPS7B81-Q1 – Automotive 150-mA, off-battery (40-V), ultra-low-IQ, low-dropout voltage regulator with enable
- LDO Noise Demystified (Rev. B) – Application note
- PCB Thermal design for automotive DC/DC converters – Video
Design & development resources
PSpice® for TI design and simulation tool
Universal LDO linear voltage regulator evaluation module for DBV, DRB, DRV and DQN packages
The MULTIPKGLDOEVM-823 evaluation module (EVM) helps you evaluate the operation and performance of several common packages of linear regulators for possible use in circuit applications. This particular EVM configuration has a DRB, DRV, DQN and DBV footprint for you to solder and (...)
Universal LDO linear voltage regulator evaluation module for DCY, DDA and KVU packages
The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU, (...)