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
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3029 Typical Application
LT3029 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


LT3029 Package Drawing
LT3029 Package Drawing

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 NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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
Click here to view our complete list of demo boards

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 NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

  • General Purpose Linear Regulator
  • Battery-Powered Systems
  • Microprocessor Core/Logic Supplies
  • Post Regulator for Switching Supplies
  • Tracking/Sequencing Power Supplies

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Design Tools

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