LTC3035 - 300mA VLDO Linear Regulator with Charge Pump Bias Generator

Features

  • Wide Input Voltage Range: 1.7V to 5.5V
  • Wide Adjustable Output Voltage Range: 0.4V to 3.6V
  • Built-In Charge Pump Generates High Side Bias
  • Very Low Dropout: 45mV at 300mA
  • ± 2% Voltage Accuracy Over Temperature, Supply, Load
  • Fast Transient Recovery
  • Low Operating Current: IIN = 100μA Typ
  • Low Shutdown Current: IIN = 1μA Typ
  • Stable with Ceramic Capacitor Down to 1μF
  • Output Current Limit
  • Thermal Overload Protected
  • Reverse Output Current Protected
  • Available in 8-Lead (3mm × 2mm)
    DFN Package

Typical Application

LTC3035 Typical Application
LTC3035 Typical Application

Description

The LTC3035 is a micropower, VLDO (very low dropout) linear regulator which operates from input voltages as low as 1.7V. The device is capable of supplying 300mA of output current with a typical dropout voltage of only 45mV. To allow operation at low input voltages the LTC3035 includes a charge pump generator that provides the necessary bias voltage for the internal LDO circuitry. Output current comes directly from the input supply for high efficiency regulation. The charge pump bias generator requires only a 0.1μF flying capacitor and a 1μF bypass capacitor for operation. The low 0.4V internal reference voltage allows the LTC3035 to be programmed to much lower output voltages than commonly available in LDOs. The output voltage is programmed via two tiny SMD resistors. The LTC3035’s low quiescent current makes it an ideal choice for use in battery-powered systems.

Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal overload protection, output current limiting and reverse output current protection. The LTC3035 is available in a tiny, low profile (3mm × 2mm × 0.75mm) 8-lead DFN package.

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
LTC3035EDDB#PBF 3x2 DFN-8 DDB E 05-08-1702 Yes
LTC3035EDDB#TRMPBF 3x2 DFN-8 DDB E 05-08-1702 Yes
LTC3035EDDB#TRPBF 3x2 DFN-8 DDB E 05-08-1702 Yes


LTC3035 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
LTC3035EDDB#PBF 3x2 DFN-8 E $1.92 Yes
LTC3035EDDB#TRMPBF 3x2 DFN-8 E $1.92 $1.37 Yes
LTC3035EDDB#TRPBF 3x2 DFN-8 E $1.92 $1.35 Yes
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* 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
DC886A LTC3035EDDB Demo Board | VLDO Linear Regulator, Charge Pump Bias Generator, 1.7V ≤ VIN ≤ 5.5V, Vout = 2.5V/3.3V/5V/Adj @ 300mA Contact Factory
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Click here to view our complete list of demo boards

Applications

  • Li-Ion to 3.3V Low Dropout Supplies
  • 2 × AA to 1.8V Low Dropout Supplies
  • Low Power Handheld Devices
  • Low Voltage Logic Supplies
  • DSP Power Supplies
  • Cellular Phones
  • Portable Electronic Equipment
  • Handheld Medical Instruments
  • Post Regulator for Switching Supply Noise Rejection

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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

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:
LTC3035

Technical Support