LT3030 - Dual 750mA/250mA Low Dropout, Low Noise, Micropower Linear Regulator

Features

  • Output Current: 750mA/250mA
  • Low Dropout Voltage: 300mV
  • Low Noise: 20μVRMS (10Hz to 100kHz)
  • Low Quiescent Current: 120μA/75μA
  • Wide Input Voltage Range: 1.7V to 20V
  • Adjustable Output: 1.220V Reference Voltage
  • Shutdown Quiescent Current: <1μA
  • Stable with 10μF/3.3μF Minimum Output Capacitor
  • Stable with Ceramic, Tantalum or Aluminum Electrolytic Capacitors
  • Precision Threshold for Shutdown Logic or UVLO Function
  • PWRGD Flag for each Output
  • Reverse Battery and Reverse Output-to-Input Protection
  • Current Limit with Foldback and Thermal Shutdown
  • Thermally Enhanced 20-Lead TSSOP and 28-Lead (4mm × 5mm) QFN Packages
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3030 Typical Application
LT3030 Typical Application

Description

The LT®3030 is a dual, micropower, low noise, low dropout linear regulator. The device operates with either common or independent input supplies for each channel, over a 1.7V to 20V input voltage range. Output 1/Output 2 supply 750mA/250mA respectively with a typical dropout voltage of 300mV. 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 120μA/75μA quiescent current makes it an ideal choice. In shutdown, quiescent current drops to less than 1μA. Shutdown control is independent for each channel and its precision logic threshold allows for voltage lockout functionality. The LT3030 includes a PWRGD flag for each channel to indicate output regulation.

The LT3030 optimizes stability and transient response with low ESR ceramic output capacitors, requiring a minimum of only 10μF/3.3μF.

Internal circuitry provides reverse-battery protection, reverse-current protection, current limiting with foldback and thermal shutdown with hysteresis. The adjustable output voltage device has a 1.220V reference voltage. The LT3030 is offered in the thermally enhanced 20-lead TSSOP and 28-lead, low profile (4mm × 5mm × 0.75mm) QFN 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
LT3030EFE#PBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT3030EFE#TRPBF TSSOP-20 FE E 05-08-1663 (CB) Yes
LT3030EUFD#PBF 4x5 QFN-28 UFD E 05-08-1712 Yes
LT3030EUFD#TRPBF 4x5 QFN-28 UFD E 05-08-1712 Yes
LT3030HFE#PBF TSSOP-20 FE H 05-08-1663 (CB) Yes
LT3030HFE#TRPBF TSSOP-20 FE H 05-08-1663 (CB) Yes
LT3030HUFD#PBF 4x5 QFN-28 UFD H 05-08-1712 Yes
LT3030HUFD#TRPBF 4x5 QFN-28 UFD H 05-08-1712 Yes
LT3030IFE#PBF TSSOP-20 FE I 05-08-1663 (CB) Yes
LT3030IFE#TRPBF TSSOP-20 FE I 05-08-1663 (CB) Yes
LT3030IUFD#PBF 4x5 QFN-28 UFD I 05-08-1712 Yes
LT3030IUFD#TRPBF 4x5 QFN-28 UFD I 05-08-1712 Yes
LT3030MPFE#PBF TSSOP-20 FE MP 05-08-1663 (CB) Yes
LT3030MPFE#TRPBF TSSOP-20 FE MP 05-08-1663 (CB) Yes


LT3030 Package Drawing
LT3030 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
LT3030EFE#PBF TSSOP-20 E $4.67 $3.27 Yes
LT3030EFE#TRPBF TSSOP-20 E $3.33 Yes
LT3030EUFD#PBF 4x5 QFN-28 E $4.67 $3.27 Yes
LT3030EUFD#TRPBF 4x5 QFN-28 E $3.33 Yes
LT3030HFE#PBF TSSOP-20 H $5.62 $3.93 Yes
LT3030HFE#TRPBF TSSOP-20 H $3.99 Yes
LT3030HUFD#PBF 4x5 QFN-28 H $5.62 $3.93 Yes
LT3030HUFD#TRPBF 4x5 QFN-28 H $3.99 Yes
LT3030IFE#PBF TSSOP-20 I $5.14 $3.60 Yes
LT3030IFE#TRPBF TSSOP-20 I $3.66 Yes
LT3030IUFD#PBF 4x5 QFN-28 I $5.14 $3.60 Yes
LT3030IUFD#TRPBF 4x5 QFN-28 I $3.66 Yes
LT3030MPFE#PBF TSSOP-20 MP $12.60 $8.82 Yes
LT3030MPFE#TRPBF TSSOP-20 MP $8.88 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
DC1855A LT3030 Demo Board | Dual, Low Noise, Micropower Linear Regulator 2.2V ≤ VIN ≤ 20V, Vout1/Vout2 = 1.5V/1.8V/2.5V/3.3V/5V @ 750mA/250mA $75.00
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
LT3030HFE#PBF TSSOP-20 H $5.62 $3.93 Yes
LT3030HFE#TRPBF TSSOP-20 H $3.99 Yes
LT3030HUFD#PBF 4x5 QFN-28 H $5.62 $3.93 Yes
LT3030HUFD#TRPBF 4x5 QFN-28 H $3.99 Yes
LT3030IFE#PBF TSSOP-20 I $5.14 $3.60 Yes
LT3030IFE#TRPBF TSSOP-20 I $3.66 Yes
LT3030IUFD#PBF 4x5 QFN-28 I $5.14 $3.60 Yes
LT3030IUFD#TRPBF 4x5 QFN-28 I $3.66 Yes
LT3030MPFE#PBF TSSOP-20 MP $12.60 $8.82 Yes
LT3030MPFE#TRPBF TSSOP-20 MP $8.88 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

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

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Models for the following parts are available in LTspice IV:
LT3030

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