LDO Linear Regulators
Analog Devices manufactures a broad line of high performance low dropout (LDO) linear regulators. These LDO regulators offer very low dropout, fast transient response, and excellent line and load regulation, and they have a very wide input voltage range (0.9 V to 80 V). Output currents range from 100 mA to 10 A, with positive, negative, and multiple outputs. Our LDO+ devices provide additional functionality and features beyond basic linear regulator performance. These may include voltage, current and temperature monitoring, diagnostic information, and features such as programmable current limit, active output discharge, or the ability to control an upstream supply powering the LDO device.
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Analog Design Tool: ADIsimPower™
ADIsimPower Selector uses your specific application requirements and compares solutions from over 300 power management parts and over 10 different topologies. Each solution takes into consideration the IC, external components, and operating condition to be able to compare expected performance.
Latest Resources
Product Selector Card
LT Journal
- Avoid Debugging Cycles in Power Management for FPGA, GPU and ASIC Systems PDF
- 1.5A, Negative Regulator Expands Family of Current-Reference Linear Regulators PDF
- Industry’s First 0.8µVRMS Noise LDO Has 79dB Power Supply Rejection Ratio at 1MHz PDF
- New Linear Regulators Solve Old Problems PDF
- Ultrafast, Low Noise, Low Dropout Linear Regulators Running in Parallel Produce Clean, Efficient, High Current Point-of-Load Power for FPGA and Server Backplanes PDF
- April 2010 - Dual 500mA µPower LDO Features Independent 1.8V–20V Inputs and Easy Sequencing in a 4mm × 3mm DFN PDF
- December 2009 - Robust, Quiet, Stable Power Supply for Active Antenna Systems with Built-In Protection and Diagnostic Capabilities PDF
- Mar 2003 Very Low Dropout (VLDO) Linear Regulator Outperforms Switching Regulators in Low Vout Applications PDF
- Dec 2003 Hot Swap Controller with Power-Up Timeout Function Simplifies Hot Swapping Boards with Multiple Power Supplies PDF
- Oct 2007 - Low Dropout Regulator Can Be Directly Paralleled to Spread The Heat PDF
- Jun 2007 - 3µA Quiescent Current LDO Improves Efficiency for Low Power Circuits in Industrial, Automotive and Battery-Powered Systems PDF
- May 2005 LDO Linear Regulators Rival Switchers for Efficiency PDF
- Dec 2005 Taking Full Advantage of Very Low Dropout Linear Regulators PDF
- Sep 2005 High Voltage Micropower Regulators Thrive in Harsh Environments PDF
- November 2004 - Power Supply Tracking for Linear Regulators PDF
- May 2004 Dual Regulators Offer Flexibility with Independent Shutdown Control and Adjustable Start-Up Timing PDF
- Feb 2004 Efficient, Flexible Boost Converter Fits into Charge-Pump Footprint PDF
- Dec 2002 A Simple Solution to Low Noise, Isolated Power Conversion PDF
- Dec 2001 Micropower Negative LDO Provides a Quiet Output in SOT-23 PDF
- Jun 1999 Micropower LDO Has the Lowest Noise and Quiescent Current in SOT-23 PDF
- High Performance Portable DC Bench Power Supply: Save Money and Free Up Bench Real Estate by Building Your Own
Application Notes
- AN-1421: Paralleling the ADP1763 LDO Regulators for High Output Current Applications (Rev. 0) PDF
- AN159 - Measuring 2nV/√Hz Noise and 120dB Supply Rejection on Linear Regulators PDF
- AN-1120: Noise Sources in Low Dropout (LDO) Regulators (Rev. 0) PDF
- AN140 - Basic Concepts of Linear Regulator and Switching Mode Power Supplies PDF
- AN142 - New Linear Regulators Solve Old Problems PDF
- AN52 - Linear Technology Magazine Circuit Collection, Volume 1 PDF
- AN65 - A Fourth Generation of LCD Backlight Technology PDF
- AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing PDF
- AN-1099: Capacitor Selection Guidelines (Rev. 0) PDF
- AN-1072: How to Successfully Apply Low Dropout Regulators PDF
- AN63 - Power for Pentium Processors; Meeting VRE Requirements PDF
- AN122 - Diode Turn-On Time Induced Failures in Switching Regulators PDF
- AN98 - Signal Sources, Conditioners and Power Circuitry Circuits of the Fall, 2004 PDF
- AN101 - Minimizing Switching Regulator Residue in Linear Regulator Outputs PDF
- AN84 - Linear Technology Magazine Circuit Collection, Volume IV PDF
- AN83 - Performance Verification of Low Noise, Low Dropout Regulators PDF
- AN70 - A Monolithic Switching Regulator with 100µV Output Noise PDF
- AN69 - LT1575 UltraFast Linear Controller Makes Fast Transient Response Power Supplies PDF
- AN67 - Linear Technology Magazine Circuit Collection, Volume III PDF
- AN66 - Linear Technology Magazine Circuit Collection, Volume II PDF
- AN64 - Using the LTC1325 Battery Management IC: PDF
- AN60 - PCMCIA Card and Card Socket Power Management: PDF
- AN58 - 5V to 3.3V Converters for Microprocessor Systems PDF
- AN54 - Power Conversion from Milliamps to Amps at Ultra-High Efficiency (Up to 95%) PDF
- AN53 - Micropower High Side MOSFET Drivers PDF
- AN51 - Power Conditioning for Notebook and Palmtop Systems PDF
Technical Articles
- Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions
- New Supply Clean Power with Ultralow Noise LDO Regulators
- Output Voltage Noise Measurements for Linear Regulators
- Hybrid Wide Dimming Ratio Linear LED Current Controller Using LT8614 & LT3083/LT6015
- Low Noise Power Supplies Come in Many Flavors: Part 1 - Linear Regulators
- Common Questions About the LTC2668 Family of 16bit VOUT DACs
- AN159: Measuring 2nV/√Hz Noise and 120dB Supply Rejection on Linear Regulators - The Quest for Quiet
- Shutdown with the LT3080x Current Source Reference Linear Regulators
- A New Era in Space Products - Radiation Tolerant
- Increasing Output Current of the Ultralow Noise, Ultrahigh PSRR LT3042 200mA Linear Regulator
- Paralleling Linear Regulators Made Easy
- Loop Gain and its Effect on Analog Control Systems
- Linear Regulators with Active Output Discharge Target Systems Needing Fast Power Down
- Digital Control Enables High Reliability DC-to-DC Power Conversion with Active Snubbing
- ADIsimPower Provides Robust, Customizable DC-DC Converter Designs
- The Fundamentals of LDO Design and Applications
- Part 2: Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards
Product Selection Guide
User Guides
- UG-832: EVAL-ADIsimPower Quick Start Guide PDF
- UG-842: EVAL-ADIsimPower User Guide PDF
- UG-400: ezLINX iCoupler Isolated Interface Development Environment Hardware User Guide PDF
- UG-414: Evaluating the ADP196 High-Side Load Switch PDF
- UG-412: Evaluating the ADP7182 Low Noise, Linear Regulator PDF
- UG-439: Evaluation Board for the ADP5034 TSSOP Micro Power Management Unit (PMU) (Rev. A) PDF
- UG-706: ADIsimPE Quick Start Guide (Rev. A) PDF
- UG-311: Reliability Handbook PDF
- UG-334: Evaluation Board for the ADP1876 Step-Down DC-to-DC Controller PDF
- UG-265: RedyKits for the ADP7104 Low Dropout (LDO) Linear Regulator PDF
- UG-264: RedyKits for the ADP7102 Low Dropout (LDO) Linear Regulator PDF
- UG-218: User Guide for the ADP7102/ADP7104 Evaluation Board PDF
- UG-271: Evaluating the ADP5023/ADP5024/ADP5034/ADP5037 Micropower Management Unit (Micro PMU) (Rev. C) PDF
- UG-289: RedyKit for the ADP150 LDO PDF
- UG-227: Evaluating the ADP223/ADP225 Dual, 300 mA Output, Adjustable, Low Noise, High PSRR Voltage Regulator PDF
- UG-122: Evaluating the ADP2140 Buck and LDO Combination Regulator PDF
- UG-091: RedyKits for the ADP160 and ADP162 Ultralow IQ Low Dropout (LDO) Regulator PDF
- UG-117: Setting Up the Evaluation Boards for the ADP160/ADP161/ADP162/ADP163 PDF
- UG-186: Evaluation Board User Guide for ADP322/ADP323 PDF
- UG-181: PLC Demo System, Industrial Process Control Demo System (Rev. A) PDF
- UG-148: RedyKit for the ADP124 LDO PDF
- UG-147: RedyKit for the ADP122 LDO PDF
- UG-090: RedyKit™ for the ADP151 LDO PDF
- UG-116: Setting Up the Evaluation Board for the ADP151 PDF
- UG-089: RedyKit for the ADP2140 PDF
- UG-052: RedyKit for the ADP121 LDO PDF
- UG-055: RedyKit for the ADP122/ADP123 LDO PDF
- UG-056: Setting Up the Evaluation Board for the ADP124/ADP125 PDF
- UG-054: Setting Up the Evaluation Board for the ADP150 PDF
Evaluation Documentation
- EVAL-ADP120: Evaluation Board for the ADP120 PDF
- ADP121 Evaluation Board (EVAL-ADP121) PDF
- ADP190 Evaluation Board for the High-Side Power Switch (EVAL-ADP190) PDF
- ADP1754/ADP1755 Evaluation Board PDF
- ADP1752/ADP1753 Evaluation Board PDF
- ADP220/ADP221 Evaluation Board PDF
- ADP1740/ADP1741 Evaluation Board PDF
- ADP130 Evaluation Board Documentation for 350 mA, Low VIN, Low Quiescent Current, CMOS Linear Regulator PDF
- EVAL-ADP1706/ADP1707/ADP1708: Evaluation Board for the ADP1706/ADP1707/ADP1708 Data Sheet PDF
- EVAL-ADP1720: Evaluation Board for the ADP1720 Data Sheet PDF
- EVAL-ADP1715/ADP1716: Evaluation Board for the ADP1715/ADP1716 PDF
- EVAL-ADP1710/ADP1711: Evaluation Board for the ADP1710/ADP1711 PDF
- ADP1712/ADP1713/ADP1714: Evaluation Board (EVAL-ADP1712/ADP1713/ADP1714) PDF
Circuit Notes
- CN0343: Ultrasonic Distance Measurement PDF
- CN0228: Single Supply Powers a 28 V, High Voltage Phase-Locked Loop (PLL) Synthesizer PDF
- CN0319: 14-Bit, 4-20 mA, Loop Powered, Ther mocouple Temperature Measurement System Using ARM Cortex-M3 PDF
- CN0305: A 16-Bit, 300 kSPS Low Power Successive Approximation ADC System with Optimum Low Power Drive Amplifier for Sub-Nyquist Input Signals Up to 4 kHz PDF
- CN0276: High Performance, 10-Bit to 16-Bit Resolver-to-Digital Converter PDF
- CN0280: Robust Completely Isolated Current Sense Circuit with Isolated Power Supply for Solar Photovoltaic Converters PDF
- CN-0285: Broadband Low Error Vector Magnitude (EVM) Direct Conversion Transmitter PDF
Design Tools
Solutions Bulletins & Brochures
Videos
- Minimizing Switching Regulator Residue in Linear Regulator Outputs
- Analog Devices: Battery Formation & Test Capabilities
- Next-Generation Sensors for Condition-Based Monitoring
- LT3015 Video Product Brief
- Directly Parallel This High Power Density Linear Regulator - LT3080
- LT3070 5A Low Voltage Digitally Programmable 85mV Low Dropout Linear Regulator
- Introducing the LT3070 Point-of-Load Regulator for FPGA & Server Backplanes
- LT3009 Video Product Brief
- LT3080 Video Product Brief
- 1.5A LDO+ Regulator Monitors Current and Temperature
- 2.1A LDO+ Regulator Features Cable Drop Compensation and Monitors Current and Temperature
- Low Noise Rail-to-Rail Negative Regulator with Programmable Current Limit
- Ultralow Noise and Ultrahigh PSRR
- LT3081 Video Product Brief
- Low Voltage Power Supplies
- Lowest Noise LDOs Enable Cutting Edge Signal Chain Performance
Press Releases
Frequently Asked Questions
Design Notes
- DN228 - Isolated RS485 Transceiver Breaks Ground Loops PDF
- DN549 - Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions PDF
- DN157 - UltraFast Linear Regulator Eliminates All Bulk Tantalum and Electrolytic Output Capacitors PDF
- DN96 - 12-Bit Rail-to-Rail Micropower DACs in an SO-8 PDF
- DN529 - Control the Voltage of a Remote Load Over Any Length of Copper Wire PDF
- DN170 - Battery Backup Regulator is Glitch-Free and Low Dropout PDF
- DN172 - High Efficiency Linear and Switching Solutions for Splitting a Digital Supply PDF
- DN121 - New Micropower, Low Dropout Regulators Ease Battery Supply Designs PDF
- DN179 - Micropower 600kHz Step-Up DC/DC Converter Delivers 5V at 1A from a Li-Ion Cell PDF
- DN220 - Lowest Noise SOT-23 LDOs Have 20µA Quiescent Current, 20µVrms Noise PDF
- DN314 - 80V Linear Regulator is Micropower PDF
- DN292 - Very Low Dropout (VLDO) Linear Regulators Supply Low Voltage Outputs PDF
- DN119 - LT1580 Fast Response Low Dropout Regulator Achieves 0.4 Dropout at 4 Amps PDF
- DN115 - Create a Virtual Ground with the LT1118-2.5 Sink/Source Voltage Regulator PDF
- DN82 - 5V to 3.3V Regulator with Fail-Safe Switchover PDF
- DN210 - 2-Phase, Dual Switching Regulator Fits in Tight Places PDF
- DN367 - Tiny Versatile Buck Regulators Operate from 3.6V to 36V Input PDF
- DN316 - Ultralow Noise Switching Power Supplies Simplify EMI Compliance PDF
- DN74 - Techniques for Deriving 3.3V from 5V Supplies PDF
- DN122 - Dual Regulators Power Pentium® Processor or Upgrade CPU PDF
- DN91 - 5V to 3.3V Circuit Collection PDF
- DN90 - High Efficiency Power Sources for Pentium TM Processors PDF
- DN87 - Fast Regulator Paces High Performance Processors PDF
- DN506 - 1.5A Rail-to-Rail Output Synchronous Step-Down Regulator Adjusts with a Single Resistor PDF
LDO Linear Regulators
| SortOrder | Part# | Number of Outputs | Vin (min) (V) | Vin (max) (V) | Output Current (typ) (A) | Output Voltage | Isupply (typ) (A) | Dropout Voltage (typ) (V) |
|---|---|---|---|---|---|---|---|---|
| 1 | LT3094 | 1 | -20 | -1.8 | 500m | Adj | 2.35m | 235m |
| 2 | LT3033 | 1 | 950m | 10 | 3 | Adj | 1.9m | 95m |
| 3 | LT3070-1 | 1 | 950m | 3 | 5 | Adj | 1m | 85m |
| 4 | LT3045-1 | 1 | 1.8 | 20 | 500m | - | 2.2m | 260m |
| 5 | ADP7185 | 1 | -5.5 | -2 | 500m | -0.5, -1, -1.2, -1.5, -1.8, -2.5, -3, -3.3, Adj | 5.5m | 190m |
| 6 | ADP1765 | 1 | 1.1 | 1.98 | 5 | 0.85, 0.9, 0.95, 1.0, 1.1, 1.2, 1.25, 1.3, 1.5 | 5m | 59m |
| 7 | ADP1764 | 1 | 1.1 | 1.98 | 4 | 0.85, 0.9, 0.95, 1.0, 1.1, 1.2, 1.25, 1.3, 1.6 | 5m | 47m |
| 8 | LT3045 | 1 | 1.8 | 20 | 500m | Adj | 2.4m | 260m |
| 9 | ADP7183 | 1 | -5.5 | -2 | 300m | -0.5, -1, -1.2, -1.5, -1.8, -2.5, -3, -3.3, Adj | 4m | 130m |
| 10 | LT3089 | 1 | 1.2 | 36 | 800m | Adj | 1.1m | 1.47 |
| 11 | ADP7159 | 1 | 2.3 | 5.5 | 2 | Adj | 4m | 200m |
| 12 | ADP7158 | 1 | 2.3 | 5.5 | 2 | 1.2, 1.8, 2.5, 2.8, 3.0, 3.3 | 4m | 200m |
| 13 | ADP7157 | 1 | 2.3 | 5.5 | 1.2 | Adj | 4m | 120m |
| 14 | ADP7156 | 1 | 2.3 | 5.5 | 1.2 | 1.2, 1.8, 2.5, 2.8, 3.0, 3.3 | 4m | 120m |
| 15 | ADP1763 | 1 | 1.1 | 1.98 | 3 | 0.9, 0.95, 1, 1.1, 1.2, 1.25, 1.3, 1.5 | 12m | 95m |
| 16 | ADP1762 | 1 | 1.1 | 1.98 | 2 | 0.9, 0.95, 1, 1.1, 1.2, 1.25, 1.3, 1.5 | 9.4m | 62m |
| 17 | ADP1761 | 1 | 1.1 | 1.98 | 1 | 0.9, 0.95, 1, 1.1, 1.2, 1.25, 1.3, 1.5 | 7.3m | 30m |
| 18 | LT3066 | 1 | 1.8 | 45 | 500m | Adj | 64µ | 300m |
| 19 | LT3091 | 1 | -36 | -1.5 | 1.5 | -Adj | 1.2m | 300m |
| 20 | LT3088 | 1 | 1.2 | 36 | 800m | Adj | 400µ | 1.35 |
| 21 | RH1965 | 1 | 1.8 | 20 | 900m | Adj | - | - |
| 22 | LT3042 | 1 | 1.8 | 20 | 200m | Adj | 2m | 350m |
| 23 | LT3062 | 1 | 1.6 | 45 | 200m | Adj | 45µ | 300m |
| 24 | LT3061 | 1 | 1.6 | 45 | 100m | Adj | 45µ | 250m |
| 25 | ADP7142 | 1 | 2.7 | 40 | 200m | 1.8, 2.5, 3.3, 5 | 50µ | 200m |
| 26 | ADP7118 | 1 | 2.7 | 20 | 200m | 1.8, 2.5, 3.3, 5 | 50µ | 200m |
| 27 | ADP7112 | 1 | 2.7 | 20 | 200m | 1.8, 2.5, 3.3, 5 | 50µ | 200m |
| 28 | ADP166 | 1 | 2.2 | 5.5 | 150m | 1.2, 1.8, 2.2, 2.3, 2.85, 3, 3.3 | 42µ | 120m |
| 29 | ADP165 | 1 | 2.2 | 5.5 | 150m | 1.2, 1.8, 2.2, 2.3, 2.85, 3, 3.3 | 42µ | 120m |
| 30 | ADM7155 | 1 | 2.3 | 5.5 | 600m | Adj | 6.5m | 120m |
| 31 | ADM7154 | 1 | 2.3 | 5.5 | 600m | 1.2, 1.8, 2.5, 2.8, 3.0, 3.3 | 4m | 120m |
| 32 | RH3083MK | 1 | 1.2 | 23 | 2.8 | Adj | - | - |
| 33 | LT3063 | 1 | 1.6 | 45 | 200m | Adj | 45µ | 300m |
| 34 | ADM7172 | 1 | 2.3 | 6.5 | 2 | 1.3, 1.8, 2.5, 3.0, 3.3, 4.2, 5.0 | 700µ | 172m |
| 35 | ADM7171 | 1 | 2.3 | 6.5 | 1 | 1.3, 1.8, 2.5, 3.0, 3.3, 4.2, 5.0 | 700µ | 84m |
| 36 | ADM7170 | 1 | 2.3 | 6.5 | 500m | 1.3, 1.8, 2.5, 3.0, 3.3, 4.2, 5.0 | 700µ | 42m |
| 37 | LT3065 | 1 | 1.8 | 45 | 500m | 1.2, 1.5, 1.8, 2.5, 3.3, 5, Adj | 55µ | 300m |
| 38 | LT3090 | 1 | -36 | -1.5 | 600m | -Adj | 1m | 300m |
| 39 | ADM7151 | 1 | 4.5 | 16 | 800m | Adj | 4.3m | 600m |
| 40 | ADM7150 | 1 | 4.5 | 16 | 800m | 1.8, 2.8, 3.0, 3.3, 4.5, 4.8, 5.0 | 4.3m | 600m |
| 41 | LT3081 | 1 | 1.2 | 36 | 1.5 | Adj | 1.1m | 1.21 |
| 42 | LT3055 | 1 | 2 | 45 | 500m | Adj | 65µ | 350m |
| 43 | ADP7105 | 1 | 3.3 | 20 | 500m | 1.8, 3.3, 5.0 | 400µ | 350m |
| 44 | LT3030 | 2 | 1.8 | 20 | 750m | Adj | 120µ | 300m |
| 45 | LT3007 | 1 | 2 | 45 | 20m | 1.2, 1.5, 1.8, 2.5, 3.3, 5, Adj | 3µ | 300m |
| 46 | ADP7182 | 1 | -28 | -2.7 | 200m | -1.2, -1.5, -1.8, -2.5, -3, 5, -5 | 33µ | 185m |
| 47 | ADM7160 | 1 | 2.2 | 5.5 | 200m | 1.8, 2.5, 3.3 | 10µ | 150m |
| 48 | LT3086 | 1 | 1.4 | 40 | 2.1 | Adj | 1.2m | 330m |
| 49 | LTC3026-1 | 1 | 1.14 | 5 | 1.5 | Adj | 95µ | 100m |
| 50 | HMC1060 | 4 | 3.35 | 5.6 | 500m | 3.3, 5.0 | - | - |
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