LT3029 - Dual 500mA/500mA Low Dropout, Low Noise, Micropower Linear Regulator
Features
- Output Current: 500mA per Channel
- Low Dropout Voltage: 300mV
- Low Noise: 20μVRMS (10Hz to 100kHz)
- Low Quiescent Current: 55μA per Channel
- Wide Input Voltage Range: 1.8V to 20V (Common or Independent Input Supply)
- Adjustable Output: 1.215V Reference Voltage
- Very Low Quiescent Current in Shutdown: <1μA per Channel
- Stable with 3.3μF Minimum Output Capacitor
- Stable with Ceramic, Tantalum or Aluminum Electrolytic Capacitors
- Reverse-Battery and Reverse Output-to-Input Protection
- Current Limit with Foldback and Thermal Shutdown
- Tracking/Sequencing Capability: Compatible with LTC292X Power Supply Tracking ICs
- Thermally Enhanced 16-Lead MSOP and 16-Lead (4mm × 3mm) DFN Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LT3029 is a dual, micropower, low noise, low dropout linear regulator. The device operates either with a common input supply or independent input supplies for each channel, over an input voltage range of 1.8V to 20V. Each output supplies up to 500mA of output current with a typical dropout voltage of 300mV. Quiescent current is well controlled in dropout. With an external 10nF bypass capacitor, output noise is only 20μVRMS over a 10Hz to 100kHz bandwidth. Designed for use in battery-powered systems, the low 55μA quiescent current per channel makes it an ideal choice. In shutdown, quiescent current drops to less than 1μA. Shutdown control is independent for each channel, allowing for flexible power management.
The LT3029 optimizes stability and transient response with low ESR ceramic output capacitors, requiring a minimum of only 3.3μF. The regulator does not require the addition of ESR, as is common with other regulators.Internal circuitry provides reverse-battery protection, reverse-current protection, current limiting with foldback and thermal shutdown. The device is available as an adjustable output voltage device with a 1.215V reference voltage. The LT3029 is offered in the thermally enhanced 16-lead MSOP and 16-lead, low profile (4mm × 3mm × 0.75mm) DFN packages.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT3029EDE#PBF | 4x3 DFN-16 | DE | E | 05-08-1732 | Yes |
| LT3029EDE#TRPBF | 4x3 DFN-16 | DE | E | 05-08-1732 | Yes |
| LT3029EMSE#PBF | MS-16E | MSE | E | 05-08-1667 | Yes |
| LT3029EMSE#TRPBF | MS-16E | MSE | E | 05-08-1667 | Yes |
| LT3029HDE#PBF | 4x3 DFN-16 | DE | H | 05-08-1732 | Yes |
| LT3029HDE#TRPBF | 4x3 DFN-16 | DE | H | 05-08-1732 | Yes |
| LT3029HMSE#PBF | MS-16E | MSE | H | 05-08-1667 | Yes |
| LT3029HMSE#TRPBF | MS-16E | MSE | H | 05-08-1667 | Yes |
| LT3029IDE#PBF | 4x3 DFN-16 | DE | I | 05-08-1732 | Yes |
| LT3029IDE#TRPBF | 4x3 DFN-16 | DE | I | 05-08-1732 | Yes |
| LT3029IMSE#PBF | MS-16E | MSE | I | 05-08-1667 | Yes |
| LT3029IMSE#TRPBF | MS-16E | MSE | I | 05-08-1667 | Yes |
| LT3029MPMSE | MS-16E | MSE | MP | 05-08-1667 | No |
| LT3029MPMSE#PBF | MS-16E | MSE | MP | 05-08-1667 | Yes |
| LT3029MPMSE#TR | MS-16E | MSE | MP | 05-08-1667 | No |
| LT3029MPMSE#TRPBF | MS-16E | MSE | MP | 05-08-1667 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT3029EDE#PBF | 4x3 DFN-16 | E | $4.10 | $2.87 | Yes | |
| LT3029EDE#TRPBF | 4x3 DFN-16 | E | $2.93 | Yes | ||
| LT3029EMSE#PBF | MS-16E | E | $4.10 | $2.87 | Yes | |
| LT3029EMSE#TRPBF | MS-16E | E | $2.93 | Yes | ||
| LT3029HDE#PBF | 4x3 DFN-16 | H | $4.96 | $3.47 | Yes | |
| LT3029HDE#TRPBF | 4x3 DFN-16 | H | $3.53 | Yes | ||
| LT3029HMSE#PBF | MS-16E | H | $4.96 | $3.47 | Yes | |
| LT3029HMSE#TRPBF | MS-16E | H | $3.53 | Yes | ||
| LT3029IDE#PBF | 4x3 DFN-16 | I | $4.47 | $3.13 | Yes | |
| LT3029IDE#TRPBF | 4x3 DFN-16 | I | $3.19 | Yes | ||
| LT3029IMSE#PBF | MS-16E | I | $4.47 | $3.13 | Yes | |
| LT3029IMSE#TRPBF | MS-16E | I | $3.19 | Yes | ||
| LT3029MPMSE | MS-16E | MP | $11.06 | $7.74 | No | |
| LT3029MPMSE#PBF | MS-16E | MP | $11.06 | $7.74 | Yes | |
| LT3029MPMSE#TR | MS-16E | MP | $7.80 | No | ||
| LT3029MPMSE#TRPBF | MS-16E | MP | $7.80 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1408A | LT3029EDE Demo Board | Dual Input, Dual Low Dropout, Low Noise, Micropower Linear Regulator, 2.3V ≤ VIN ≤ 20V, Vout1/Vout2 = 1.5V/1.8V/2.5V/3.3V/5V/Adj @ 500mA | $100.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT3029HDE#PBF | 4x3 DFN-16 | H | $4.96 | $3.47 | Yes | |
| LT3029HDE#TRPBF | 4x3 DFN-16 | H | $3.53 | Yes | ||
| LT3029HMSE#PBF | MS-16E | H | $4.96 | $3.47 | Yes | |
| LT3029HMSE#TRPBF | MS-16E | H | $3.53 | Yes | ||
| LT3029IDE#PBF | 4x3 DFN-16 | I | $4.47 | $3.13 | Yes | |
| LT3029IDE#TRPBF | 4x3 DFN-16 | I | $3.19 | Yes | ||
| LT3029IMSE#PBF | MS-16E | I | $4.47 | $3.13 | Yes | |
| LT3029IMSE#TRPBF | MS-16E | I | $3.19 | Yes | ||
| LT3029MPMSE#PBF | MS-16E | MP | $11.06 | $7.74 | Yes | |
| LT3029MPMSE#TRPBF | MS-16E | MP | $7.80 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- General Purpose Linear Regulator
- Battery-Powered Systems
- Microprocessor Core/Logic Supplies
- Post Regulator for Switching Supplies
- Tracking/Sequencing Power Supplies
People Who Viewed This Product Also Viewed
- LT1763 - 500mA, Low Noise, LDO Micropower Regulators
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LT3032 Series - Dual 150mA Positive/Negative Low Noise Low Dropout Linear Regulator
- LT3085 - Adjustable 500mA Single Resistor Low Dropout Regulator
- LT3024 - Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulator
- LT3015 - 1.5A, Low Noise, Negative Linear Regulator with Precision Current Limit
- LT1761 - 100mA, Low Noise, LDO Micropower Regulators in TSOT-23
- LT1963A Series - 1.5A, Low Noise, Fast Transient Response LDO Regulators
- LT1964 - 200mA, Low Noise, Low Dropout Negative Micropower Regulator
- LT3081 - 1.5A Single Resistor Rugged Linear Regulator with Monitors
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Models for the following parts are available in LTspice:
LT3029
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
